INTERNATIONAL CONFERENCE ON QUANTUM INFORMATION AND QUANTUM COMPUTING (ICQIQC 2013)
PROGRAMME and ABSTRACTS
IISc, Bangalore 7-11 January 2013
Supporting academic institutions
Harish-Chandra Research Institute, Allahabad
Indian Institute of Science, Bangalore
00 Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore
Quantum Information Group, Institute of Mathematical Sciences, Chennai
Raman Research Institute, Bangalore
Tata Institute of Fundamental Research, Mumbai
Supporting agencies
Board of Research in Nuclear Sciences
Council of Scientific and Industrial Research
Space-time
The International Conference on Quantum Information and Quantum Computing starts at 17:00 on January 6, and ends at 20:30 on January 11. The conference venue is the Faculty Hall, Main Building, Indian Institute of Science, Bangalore.
Registration
The registration opens at 17:00 on 6 January, on the ground floor of the Physical Sciences Building. From 8:00 on 7 January onwards, the registration and information desk shifts to the Faculty Hall Foyer.
Welcome Reception
The conference welcome reception takes place at 19:00 on 6 January, on the lawns of the Jawahar Visitors House, IISc campus.
Food
The participants should have breakfast at their place of accommodation. During 7-11 January, lunch and dinner for registered participants have been arranged in the Guest House reception area, IISc.
Transport
Taxis and vans have been arranged to transport participants between the Green Path hotel/the United Theological College hostel and IISc. The pick-up time in the mornings is 8:00, and the return time in the evenings is after dinner.
Banquet
The conference banquet is at 19:00 on 8 January, at the Taj Vivanta, Yeshwantpur. Vehicles have been arranged to transport the participants between IISc and Taj Vivanta.
Cultural Programme
A combined Indian classical dance and music performance (Bharatanatyam and Veena) has been arranged at 18:00 on 10 January, in the J.R.D. Tata auditorium of the National Institute of Advanced Studies, IISc campus.
Travel Desk
To assist the participants in their travel and sight-seeing plans, a travel desk has been arranged, next to the registration and information desk. Local Contact Information
Overall Conveners: Prof. Apoorva Patel 97412-94802 Prof. Anil Kumar 98454-21938
Accommodation and Transport Arrangements: Dr. Subroto Mukerjee 94817-89167
Registration: Prof. Vasant Natarajan 94498-27574
Catering and Food: Prof. Arindam Ghosh 98800-64200
Faculty Hall Management and Poster Presentations: Dr. P.S. Anil Kumar 98863-72499
Banquet and Cultural Programme: Dr. Kota Murali 97409-66884
Physics Department Office: Mr. Srivatsa 080-2293-3334 International Advisory Committee
Scott Aaronson Cambridge, USA Girish S. Agarwal Oklahoma, USA Alain Aspect Paris, France Charles H. Bennett IBM-Yorktown Heights, USA Sougato Bose London, UK Gilles Brassard Montreal, Canada Samuel L. Braunstein York, UK Hans J. Briegel Innsbruck, Austria Carlton M. Caves Albuquerque, USA Artur Ekert Oxford, UK and NUS, Singapore Lov K. Grover Murray Hill, USA Jozef Gruska Brno, Czech Republic Dipankar Home Kolkata, India Jaewan Kim Seoul, Korea Raymond Laflamme Waterloo, Canada Anthony J. Leggett Urbana-Champaign, USA Maciej Lewenstein Barcelona, Spain Daniel Lidar Los Angeles, USA Seth Lloyd Cambridge, USA Archan S. Majumdar Kolkata, India John Preskill Pasadena, USA S.M. Roy Mumbai, India R. Simon Chennai, India Umesh Vazirani Berkeley, USA Vlatko Vedral Oxford, UK, and Singapore Yoshihisa Yamamoto Stanford, USA, and Tokyo, Japan National Organizing Committee
P.S. Anil Kumar IISc, Bangalore Arvind IISER, Mohali Arindam Ghosh IISc, Bangalore N.D. Hari Dass CMI, Chennai Guruprasad Kar ISI, Kolkata H.R. Krishnamurthy IISc, Bangalore Anil Kumar IISc, Bangalore T.S. Mahesh IISER, Pune Prabha Mandayam IMSc, Chennai Subroto Mukerjee IISc, Bangalore Kota Murali IBM, Bangalore Vasant Natarajan IISc, Bangalore Rahul Pandit IISc, Bangalore Prasanta Panigrahi IISER, Kolkata Apoorva Patel IISc, Bangalore Arun K. Pati HRI, Allahabad K.V. Ramanathan IISc, Bangalore Aditi Sen De HRI, Allahabad Diptiman Sen IISc, Bangalore Ujjwal Sen HRI, Allahabad Urbasi Sinha RRI, Bangalore C.E. Veni Madhavan IISc, Bangalore International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Monday 07 January 2013
Monday 07 January 2013
Registration - Faculty Hall, Main Building (08:30-08:45)
Inauguration - Faculty Hall, Main Building (08:45-09:00)
Welcome - Faculty Hall, Main Building (08:45-09:00)
- Presenters: Prof. PANDIT, Rahul; Prof. KUMAR, Anil
Session 1 - Faculty Hall, Main Building (09:00-10:30) time title 09:00 Experimental Quantum Error Correction Presenter: LAFLAMME, Raymond The Achilles' heel of quantum information processors is the fragility of quantum states and processes. Without a method to control imperfection and imprecision of quantum devices, the probability that a quantum computation succeeds will decrease exponentially in the number of gates it requires. In the last fifteen years, building on the discovery of quantum error correction, accuracy threshold theorems were proved showing that error can be controlled using a reasonable amount of resources as long as the error rate is smaller than a certain threshold. We thus have a scalable theory describing how to control quantum systems. I will briefly review some of the assumptions of the accuracy threshold theorems and comment on recent experiments that have been done and should be done to turn quantum error correction into an experimental reality.
09:45 Key Establishment a la Merkle in a Quantum World Presenter: BRASSARD, Gilles In 1974, Ralph Merkle proposed the first unclassified scheme for secure communications over insecure channels. When legitimate communicating parties are willing to spend an amount of effort proportional to some parameter N, an eavesdropper cannot break into their communication without expending an effort proportional to N^2, which is quadratically more than the legitimate effort. However, Merkle's original scheme becomes completely insecure against a quantum adversary. Can its security be restored (at least partially) if the legitimate parties are also allowed to use quantum computation? We give two novel key agreement schemes in the spirit of Merkle's. The first one requires an effort proportional to N^{5/3} to be broken by a quantum adversary. In the second scheme, the legitimate parties are purely classical, yet it cannot be broken by a quantum eavesdropper who is not willing to work significantly harder than the legitimate parties, making it the first provably secure post-quantum cryptographic scheme in the random oracle model. In these schemes, as opposed to quantum key distribution, all communication is classical. No prior knowledge of cryptography will be assumed.
Tea/coffee break - Faculty Hall Foyer, Main Building (10:30-11:00)
Session 2 - Faculty Hall, Main Building (11:00-12:30) time title 11:00 Spin Filtering, Internal Exchange Interactions: Towards Molecular Data Storage and Manipulations? Presenter: MOODERA, Jagadeesh Bilayer systems consisting of a ferromagnet and a normal layer can show huge internal exchange fields, and when combined with a counter electrode to form a tunnel junction can yield large spin polarization as well as magnetoresistance. A phenalenyl organic molecular layer in close proximity to a ferromagnet can show unexpected magnet and spin filtering phenomena down to a monolayer/bilayer level. These will be shown and discussed.
11:45 Dynamics of Entanglement under Environmental Perturbations and its Control Presenter: AGARWAL, Girish We consider general features of the dynamics of quantum entanglement under environmental perturbations and under the action of other unavoidable devices like amplifiers. We argue quite generally that one needs to make the evolution non markovian to slow down the loss of entanglement. The results would be illustrated by a number of examples using both qubits and continuous variables.
Page 2 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Monday 07 January 2013
Lunch - Guest House Lawns (12:30-14:00)
Session 3 - Faculty Hall, Main Building (14:00-15:30) time title 14:00 Witnesses for Teleportation, Discord and Purity Presenter: MAJUMDAR, Archan We describe mechanisms for detecting three useful but different quantum information processing resources in unknown states, viz., (i) utility as teleportation channel, (ii) quantum correlations beyond entanglement, and (iii) purity, respectively.
14:30 Extremal Extensions of Entanglement Witnesses and PPT Entangled States Presenter: ARVIND PPT entangled states are very interesting objects and their entanglement is typically unearthed using positive maps which are not completely positive. The talk will give an overview of the field and also describe some of our recent results.
15:00 Bound-entanglement is Not a Rare Phenomenon for Gaussian States Presenter: R, Simon Horodecki, Cirac, and Lewenstein have shown that bound-entanglement for continuous variables is a rare phenomenon. We examine this issue in the case of Gaussian states, and show that in this restricted case bound-entanglement is NOT a rare phenomenon. The significance of this result is that it encourages the hope of actually producing in the laboratory continuous variable bound-entangled states.
Tea/coffee break - Faculty Hall Foyer, Main Building (15:30-16:00)
Session 4 - Faculty Hall, Main Building (16:00-17:00) time title 16:00 Quantum Simulations by NMR Presenter: DU, Jiangfeng
16:30 Recent Developments in Quantum Information Processing by NMR Presenter: KUMAR, Anil After a brief introduction to NMR Quantum Information Processing, the following recent developments in our laboratory will be described. 1. Universal quantum computation in NMR using Genetic Algorithm. Gates, PPS and singlet state (Bell State) creation. 2. Quantum Simulation of Dzyaloshinsky-Moriya (DM) interaction in presence of Heisenberg XY interaction, by NMR using Genetic Algorithm. 3. Quantum simulation of frustration in quantum transverse Ising spin system by NMR.
Free time - Main Building (17:00-19:00)
Dinner - Guest House Lawns (19:00-20:30)
Page 3 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Tuesday 08 January 2013
Tuesday 08 January 2013
Session 5 - Faculty Hall, Main Building (09:00-10:30) time title 09:00 Quantum Tomography Presenter: SUDARSHAN, E C George Quantum Computation is carried out with the use of qubits which are two level Quantum Mechanical systems, whose states are represented by 2x2 complex hermitian matrices of unit trace. The determination of the state of such a system is already familiar from the traditional analysis of the polarization states of a light beam. Such an analysis involves the use of photometers, quarter wave plates, polarisers and analysers. The subject of Quantum Tomography is the study of multiple, coupled qubits. Each of these processes is a partial detection of the result of "measurements " which may be represented by the Pauli matrices for each qubit. We may use these as successive steps in a tomographic analysis. Tomography relates to the determination of a two dimensional distribution, in terms of an infinity of line integrals as originally introduced by Radon. This can be used for medical diagnostics, structure determination in Engineering applications etc. When the distribution is a complex valued wave function, the methods become applicable to Quantum Tomography. In the presence of entanglement, we need to do quantum process tomography.
09:45 Quantum Dot Spin-Photon Entanglement via Frequency Downconversion to Telecom Wavelength Presenter: YAMAMOTO, Yoshihisa Long-distance quantum teleportation and quantum repeater technologies require entanglement between a single matter quantum bit (qubit) and a telecommunications (telecom)-wavelength photonic qubit. Electron spins in III-V semiconductor quantum dots are among the matter qubits that allow for the fastest spin manipulation and photon emission, but entanglement between a single quantum-dot spin qubit and a flying (propagating) photonic qubit has yet to be demonstrated. Moreover, many quantum dots emit single photons at visible to near- infrared wavelengths, where silica fibre losses are so high that long-distance quantum communication protocols become difficult to implement. Here we demonstrate entanglement between an InAs quantum-dot electron spin qubit and a photonic qubit, by frequency downconversion of a spontaneously emitted photon from a singly charged quantum dot to a wavelength of 1,560 nanometres. The use of sub-10-picosecond pulses at a wavelength of 2.2 micrometres in the frequency downconversion process provides the necessary quantum erasure to eliminate which-path information in the photon energy. Together with previously demonstrated indistinguishable single-photon emission at high repetition rates, the present technique advances the III-V semiconductor quantum-dot spin system as a promising platform for long-distance quantum communication.
Tea/coffee break - Faculty Hall Foyer, Main Building (10:30-11:00)
Session 6 - Faculty Hall, Main Building (11:00-12:30) time title 11:00 Higher-order Interferences of Single Photons Presenter: WEIHS, Gregor Using a three- and a five-path interferometer and single photons derived from a heralded single photon sources we have been able to put tight bounds on potential higher-order interferences and on the possibility of quaternion-based quantum mechanics.
Page 4 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Tuesday 08 January 2013
11:30 Multi-dimensional Quantum Systems: Two is Company but Three is still not a Crowd Presenter: SINHA, Urbasi This talk will cover a few experiments and theoretical proposals that I have been working on in recent times. The first experiment describes a precision test for Born rule for probabilities in quantum mechanics. As one of the postulates of quantum mechanics, Born's rule tells us how to get probabilities for experimental outcomes from the complex wave function of the system. It's quadratic nature entails that interference occurs in pairs of paths. An experiment was done at the Institute for Quantum Computing, Canada that sets out to test the correctness of Born's rule by testing for the presence or absence of genuine three-path interference. This is done using single photons and a triple slit aperture [1,2,3,4]. In the next experiment I will describe the usage of the triple slit system to demonstrate a stable qutrit. The qutrit levels are encoded in the spatial modes of single photons which are incident on the system of triple slits. Our set-up demonstrates a very simple qutrit which allows for tomographic reconstruction of generalized states. We have used our qutrit to perform the first ever experimental verification of the Aharon-Vaidman quantum game which exemplifies the advantage of using simple quantum systems to outperform classical strategies. The quantum version of the game is a specific example of a system where the quantum effects can be demonstrated even when all parties play the game at the same location and is thus conceptually distinct from the games using Bell-type entanglement. Our experiment therefore demonstrates that a quantum advantage is possible even when the underlying property is not entanglement. Furthermore, one of the main experimental challenges in demonstrating a truly “quantum” version of the game lies in the fact that most approaches involve intermediate measurement steps which could lead to decoherence thus rendering any future quantum moves meaningless. In this experiment however, we are free from such loss of information [5]. In the last part, I will describe some recent theoretical work involving Feynman’s path integral formalism which aims to provide theoretical insight to the type of experiments discussed earlier [6].
12:00 Multiparty Quantum Correlations in Many-body Systems Presenter: SEN, Ujjwal The recent developments in computation and communication tasks have underlined the necessity to preserve quantum coherence in states shared by a large number of quantum systems. Such exciting developments on the theoretical front were accompanied by several experimental proposals and realizations, by using e.g. photons, ion traps, cold atoms, and nuclear magnetic resonance. I will introduce a macroscopic state and show that in contrast to other existing states, it has quantum coherence that is resistant to the twin effects of environmental noise -- local decoherence on all the particles and loss of a finite fraction of its particles. The nature of quantum correlations also holds the key in the understanding of nonclassical phenomena such as quantum phase transitions in spin systems. I will discuss about our recent works where we employ a genuine multipartite entanglement measure, the generalized geometric measure, for investigating the quantum phase transition in an infinite quantum spin-1/2 chain with two-spin as well as three-spin interactions. We show that in contrast to bipartite entanglement of the ground state, the genuine multiparty one unerringly indicates the quantum phase transition in the system. The system lends itself to a complementary behavior between bipartite and genuine multipartite entanglements.
Lunch - Guest House Lawns (12:30-14:00)
Session 7 - Faculty Hall, Main Building (14:00-15:30) time title 14:00 The Quantum Substate Theorem Presenter: NAYAK, Ashwin Consider quantum states rho, sigma in the same finite dimensional Hilbert space. We say that rho is a c-substate of sigma if rho <= 2^c sigma, where <= represents the Lowner partial order. This may be used to construct the state rho from sigma, much like we may generate fair coin tosses from biased ones through rejection sampling. The success probability of the process is then 1/2^c. We are interested in how well sigma simulates rho in the above sense. In other words, we are interested in the least c such that rho is a c-substate of sigma. This quantity is the relative min-entropy of the two states. For typical applications, such as privacy trade-offs in communication protocols, it suffices to construct an approximation rho' to rho, with respect to a metric on quantum states. This leads us to the notion of the *smooth* relative min-entropy of the two states. If rho is a c-substate of sigma, i.e., their relative min-entropy is at most c, then their relative entropy is also at most c. Jain, Radhakrishnan and Sen (2002) gave a weak converse to this relation via the Quantum Substate Theorem. This gives a bound on the eps-smooth relative min-entropy in terms of the more familiar notion of relative entropy. We present alternative proofs of the Quantum Substate Theorem, also strengthening it in the process. The proofs that we present are both shorter and conceptually simpler than the original proof.
Page 5 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Tuesday 08 January 2013
14:30 Unextendible Mutually Unbiased Bases Presenter: MANDAYAM, Prabha Mutually Unbiased Bases play an important role in our understanding of complementarity in quantum mechanics and are central to most quantum cryptographic tasks. A set of MUBs is said to be unextendible if there does not exist another basis that is unbiased with respect to the given set. While constructions of complete sets of (d + 1) MUBs in dimension d = 2^n are known, we prove the existence of smaller, unextendible sets of MUBs in these dimensions. In particular, we provide a construction of unextendible sets of (d + 1) MUBs in d = 2^n , using commuting classes of Pauli operators. Furthermore, our construction identifies sets of n-qubit Pauli operators that lead to state-independent proofs of the Kochen-Specker theorem in 2^n dimensions.
15:00 Measurement-Induced Non-locality in an n-partite Quantum State Presenter: JOAG, Pramod We generalize the concept of measurement-induced non-locality (MiN) to n-partite quantum states. We get exact analytical expressions for MiN in an n-partite pure and n-qubit mixed state. We obtain the conditions under which MiN equals geometric discord in an n-partite pure state and an n-qubit mixed state. We relate MiN and Meyer-Wallach measure of entanglement in multipartite pure states.
Tea/coffee break - Faculty Hall Foyer, Main Building (15:30-16:00)
Group Photograph - In front of J.N. Tata Statue (16:00-16:15)
Poster Session - Faculty Hall Foyer, Main Building (16:15-17:30)
Public Lecture - Faculty Hall, Main Building (17:30-18:30) time title 17:30 The Second Quantum Revolution: Harnessing the quantum properties of nature Presenter: LAFLAMME, Raymond We are at the dawn of a new technological revolution. Just as the 19th century was the Machine Age and the 20th century was the Information Age, the 21st century promises to go down as the Quantum Age. Harnessing and controlling the counter-intuitive properties of quantum mechanics will enable previously unimaginable technologies that will transform the ways we work, communicate and live. Quantum information processing forces us to learn a new language---one that describes the behaviours and interactions of the universe's most fundamental building blocks. We are now learning to speak this quantum language---to control quantum systems and apply them toward unprecedented applications in the laboratory and beyond. We are discovering new ways to navigate the nano-scale world, and we are tapping into the incredible potential of quantum computers, sensors, communications devices and more. Quantum technologies are already finding real-world applications, and the fundamental groundwork is now being laid for revolutionary advances in the coming years, from ultra-powerful computers to unbreakable cryptography and more. I will describe some of the recent progress in the field, particularly in the experimental realm, such as implementations of algorithms on small quantum processors---an important demonstration of control over the quantum world. I will conclude by exploring some of the unexpected offshoots of quantum information research, such as advances in neutron interferometry and oil exploration.
Free time - Main Building (18:30-19:00)
Banquet - Strategy Hall, Taj Vivanta (19:00-21:30)
Page 6 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Wednesday 09 January 2013
Wednesday 09 January 2013
Session 8 - Faculty Hall, Main Building (09:00-10:30) time title 09:00 Low Decoherence Silicon-based Electron Spin Qubits Presenter: LYON, Stephen Qubits with long coherence are required for quantum information applications. It has been known for decades that electron spins in Si have long relaxation times, but it was often assumed that embedding the qubits into a solid host would limit their coherence to a millisecond, or so. However, improvements in materials and measurements have steadily increased the measured spin coherence of electrons in Si. I will discuss recent ensemble Electron Spin Resonance (ESR) measurements which find that electrons bound to donors in silicon can have very long spin coherence times - 3 or 4 orders of magnitude longer than a millisecond. Free electrons, on the other hand, remain coherent for only a few microseconds; a simple consequence of phonon scattering and the spin-orbit interaction. Lithographically-defined quantum dots are being actively pursued by several groups, since these electrons can be manipulated with gate electrodes while remaining bound and thus promising long spin coherence. I will discuss ESR experiments on arrays of Si/SiGe quantum dots where we find that binding electrons into dots improves their spin coherence by at least 2 orders of magnitude relative to free electrons, though it is still shorter than seen with the donors.
09:45 Entangled Photon Triplets Presenter: JENNEWEIN, Thomas Non-classical states of light, such as entangled photon pairs and number states, are essential for fundamental tests of quantum mechanics and optical quantum technologies. The most widespread technique for creating these quantum resources is spontaneous parametric down-conversion of laser light into photon pairs. Conservation of energy and momentum in this process, known as phase-matching, gives rise to strong correlations that are used to produce two-photon entanglement in various degrees of freedom. It has been a longstanding goal in quantum optics to realize a source that can produce analogous correlations in photon triplets, but of the many approaches considered, none has been technically feasible. In the first part of the talk, we report the observation of photon triplets generated by cascaded down-conversion [1]. Each triplet originates from a single pump photon, and therefore quantum correlations will extend over all three photons in a way not achievable with independently created photon pairs. Our photon-triplet source will allow experimental interrogation of novel quantum correlations, the generation of tripartite entanglement without post-selection and the generation of heralded entangled photon pairs suitable for linear optical quantum computing. Two of the triplet photons have a wavelength matched for optimal transmission in optical fibres, suitable for three-party quantum communication. Furthermore, our results open interesting regimes of non-linear optics, as we observe spontaneous down-conversion pumped by single photons, an interaction also highly relevant to optical quantum computing.
Entangled quantum particles have correlations stronger than those allowed by classical physics. These correlations are at the heart of deep foundational questions in quantum mechanics and form the basis of many emerging quantum technologies. Although the discrete variables of up to 14 ions and the continuous variables between three intense optical beams have been entangled, it has remained an open challenge to entangle the continuous properties of three or more individual particles. In the second part of the talk, we report an experimental demonstration of genuine tripartite continuous-variable entanglement between three separated particles [2]. In our set-up the three particles are photons created directly from a single input photon; the creation process leads to quantum correlations between the energies and emission times of the photons. The entanglement between our photons is the three-party generalization of the Einstein–Podolsky–Rosen correlations for continuous variables, and could serve as a valuable resource in a wide variety of quantum information tasks.
Tea/coffee break - Faculty Hall Foyer, Main Building (10:30-11:00)
Session 9 - Faculty Hall, Main Building (11:00-12:30) time title 11:00 Qudit Communication Network Presenter: KIM, Jaewan Optical coherent states can be interpreted as d-dimensional quantum systems, or qudits of even superposition of pseudo-number states. Cross-Kerr nonlinear interaction can generate the maximal entanglements of pseudo- phase and pseudo-number states from two opticl coherent states. Extended network of these entangled coherent states is a qudit cluster state and can be used as qudit communication network for d-dimensional teleportation or multi-user quantum cryptographic network.
Page 7 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Wednesday 09 January 2013
11:30 Multiparty Quantum Correlation and its Application in Quantum Communication Presenter: SEN DE, Aditi Recent developments in computation and communication tasks have underlined the necessity to preserve quantum coherence in states shared by a large number of quantum systems. Such exciting developments on the theoretical front were accompanied by several experimental proposals and realizations, by using e.g. photons, ion traps, cold atoms, and nuclear magnetic resonance. I will introduce a macroscopic Schrodinger cat state and show that in contrast to other proposed cat states, it has quantum coherence that is resistant to the twin effects of environmental noise -- local decoherence on all the particles and loss of a finite fraction of its particles. We will also establish a universal complementarity relation between the capacity of classical information transmission by employing a multiparty quantum state as a multiport quantum channel, and the genuine multipartite entanglement of that quantum state. The relation holds for arbitrary pure or mixed quantum states of an arbitrary number of parties in arbitrary dimensions.
12:00 Quantum Correlations are Physical Presenter: PATI, Arun Erasure of information stored in a quantum state requires energy cost and is inherently an irreversible operation. If quantumness of a system is physical, does erasure of quantum correlation as measured by discord also need some energy cost? In this talk, I will show that change in quantum correlation is never larger than the total entropy change of the system and the environment. The entropy cost of erasing correlation has to be at least equal to the amount of quantum correlation erased. Hence, quantum correlation can be regarded as genuinely physical. We show that the new bound leads to the Landauer erasure. The physical cost of erasing quantum correlation is well respected in the case of bleaching of quantum information, thermalization, and can have potential application for any channel leading to erasure of quantum correlation.
Lunch - Guest House Lawns (12:30-14:00)
Free Afternoon - (14:00-20:00)
Page 8 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Thursday 10 January 2013
Thursday 10 January 2013
Session 10 - Faculty Hall, Main Building (09:00-10:30) time title 09:00 Computing Immanants from Photon Coincidences Presenter: SANDERS, Barry Predicting photon-coincidence probabilities for multi-channel interferometers with single photons entering each input port is computationally hard. The problem can be turned around by using the interferometer as a computational tool to compute these distributions. We show how photon coincidence rates as functions of delay times between input photons reveal immanants (with determinants and permanents as special cases) of the interferometer transformation matrix. Interferometers could serve as a natural purpose-built (non-universal) quantum computer for solving non-trivial computational problems. We show that the famous Hong-Ou-Mandel two-photon dip is a special case of this result.
09:45 Quantum Measurement and Feedback with Superconducting Circuits Presenter: RAJAMANI, Vijayaraghavan Recent advances in superconducting parametric amplifiers have enabled high fidelity measurements of superconducting quantum bits (qubits) near the quantum limit. I will describe experiments where we measure the state of a superconducting qubit coupled to a microwave cavity. This architecture has been named circuit Quantum Electrodynamics (cQED) and is analogous to the Cavity QED architecture in atomic physics where an atom is coupled to a cavity. We implement the qubit by using the two lowest levels of an anharmonic oscillator constructed using a capacitively shunted aluminum Josephson junction. The microwave cavity is an aluminum waveguide cavity. The qubit state modifies the resonant frequency of the cavity and can thus be measured by probing the cavity using microwaves. A central feature of this measurement process is the entanglement between the qubit and the coherent microwave field (the pointer) exiting the cavity. The use of parametric amplifiers to analyze the microwave field enables us to observe this entanglement with high fidelity. We reconstruct quantum trajectories of the qubit state as it evolves during measurement and show that the final state of the qubit is consistent with the trajectories. Further, we use quantum feedback to actively steer the state of the qubit and demonstrate Rabi oscillations which persist indefinitely. Finally, I will discuss how we can use the pointer states to generate entanglement between remote qubits and stabilize them using feedback. Applications to measurement based quantum control and quantum computing will also be discussed.
Tea/coffee break - Faculty Hall Foyer, Main Building (10:30-11:00)
Session 11 - Faculty Hall, Main Building (11:00-12:30) time title 11:00 Quantum Energy Protocol in the Quantum Hall System Presenter: YUSA, Go In this presentation, we show a theoretical proposal for an experimental method to verify a quantum protocol termed quantum energy teleportation (QET)[1], which allows energy transportation to a remote location without physical carriers. We use chiral edge channels in a quantum Hall system and their zero-point fluctuations as an experimental system[2]. We discuss the physical significance of this quantum energy protocol and estimate the order of energy gain using reasonable experimental parameters.
11:30 Towards Quantum Dot Based Planar Integrated Circuits for Quantum Information Processing Presenter: ACHANTA, Venu Gopal Quantum dots (QDs) are solid state equivalent of atoms though they differ from the atoms as they decohere due to environmental interactions. Origin and control of decoherence is interesting for high fidelity device development. There are many proposals for coupled QDs based architectures for quantum computing. Due to fabrication challenges, compared to vertically stacked QDs, it is easier to get uniform dots in plane. Thus, planar architectures are more realizable with present day technologies. QD spins are considered better qubits due to their long lifetimes. For planar quantum information processing circuits, thus coupling QD spin to photon is important. We present results on single quantum dots where the acoustic phonon mediation is shown as the dominant dephasing mechanism. In addition, we present planar photonic crystal based structures for coupling QD spin to photons. In a device with linear crossed waveguides, we demonstrate that QD spin can be mapped by measuring which path the photons take.
Page 9 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Thursday 10 January 2013
12:00 Interplay of Quantum Coherence and Environmental Noise in Biological Processes: Case of Avian Magneto-reception Presenter: BANDYOPADHYAY, Jayendra Recently there has been a growing interest in the application of quantum mechanics to understand many biological processes, namely photosynthesis, process of olfaction, avian magneto-reception, etc. These interests have brought physicists, chemists, and biologists at the same platform, and lead to the beginning of a new interdisciplinary field called ‘Quantum Biology’. A major motivation of these studies is to understand how nature utilizes certain pure quantum phenomena like coherence or entanglement to optimize biological processes. Importantly, these natural processes take place at normal temperature and without any isolation from its environment. Quantum information community is particularly interested to understand these biological processes because of its probable application in the development of quantum computer at normal temperature. In this talk, I will give a brief overview of few "quantum" biological processes, and will focus mostly on the proposed Spin-dependent Radical Pair based model of the avian magneto-reception process. I will also discuss how nature uses environmental noise in very optimal way to enhance sensitivity of the magneto-reception process.
Lunch - Guest House Lawns (12:30-14:00)
Session 12 - Physical Sciences Auditorium (14:00-15:30) time title 14:00 Macrorealism via entropic Leggett-Garg inequalities Presenter: SUDHA A foundational concept of classical world that is at variance with the quantum description is macrorealism. The notion of macrorealism rests on the classical world view that (a) physical properties of a macroscopic object exist independent of the act of observation and (b) measurements are non-invasive i.e., the measurement of an observable at any given instant of time does not influence its subsequent evolution. Quantum predictions differ at a foundational level from these two contentions. In 1985, Leggett and Garg proposed an inequality to test whether a single macroscopic object exhibits macrorealism or not. The Leggett-Garg correlation inequality (formulated originally for dichotomic observables) is satisfied by all macrorealistic theories and is violated if quantum law governs. We discuss entropic Leggett-Garg inequality developed following the approach for spatially separated entangled bipartite systems proposed by Braunstein and Caves. We discuss how macrorealistic tenet encrypted in the form of classical entropic inequality get defeated in the quantum realm.
14:30 NMR Investigations of Leggett-Garg Inequality Presenter: T S, Mahesh Distinguishing quantum from classical behavior has been an important issue since the development of quantum theory. Violations of Bell-type inequalities demonstrate the non-classical correlations between spatially separated objects, while the violations of Leggett-Garg inequality (LGI) demonstrate the non-classical correlations of a single dynamical system at different time instants. In recent years, various protocols for implementing LGI and its refined versions have been proposed and experimentally demonstrated. We describe the experimental implementation of a protocol for testing LGI for nuclear spins precessing in an external magnetic field. The implementation involves certain controlled operations, performed in parallel on pairs of spin 1/2 nuclei (target and probe) from molecules of a nuclear magnetic resonance (NMR) ensemble, which enable evaluation of temporal correlations from an LG string. Our experiment demonstrates violation of the LGI for time intervals between successive measurements, over which the effects of relaxation on the quantum state of target spin are negligible. We also describe an experimental study of recently formulated entropic Leggett-Garg inequality (ELGI) by Usha Devi et al. (arXiv: 1208.4491v2 (2012)). This inequality places a bound on the statistical measurement outcomes of dynamical observables describing a macrorealistic system. We have studied ELGI using a two-qubit NMR system. To perform the noninvasive measurements required for the ELGI study, we prepare the system qubit in a maximally mixed state as well as use the ‘ideal negative result measurement’ procedure with the help of an ancilla qubit. As predicted by quantum theory, the experimental results show a clear violation of ELGI by over four standard deviations. The violation of ELGI is attributed to the fact that certain joint probabilities are not legitimate in the quantum scenario, in the sense they do not reproduce all the marginal probabilities. Using a three-qubit system, we have experimentally demonstrated that three-time joint probabilities do not reproduce certain two-time marginal probabilities.
Page 10 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Thursday 10 January 2013
15:00 Quantum Simulation via Filtered Hamiltonian Engineering Presenter: AJOY, Ashok We propose a method for Hamiltonian engineering in quantum information processing architectures that requires no local control, but only relies on collective qubit rotations and field gradients. The technique achieves a spatial modulation of the coupling strengths via a dynamical construction of a weighting function combined to a Bragg grating. As an example, we demonstrate how to generate the ideal Hamiltonian for perfect quantum information transport between two separated nodes of a large spin network. We engineer a spin chain with optimal couplings from a large spin network, such as naturally occurring in crystals, while decoupling all unwanted interactions. For realistic experimental parameters, our Hamiltonian engineering method can be used to drive perfect quantum information transport at room-temperature.
Tea/coffee break - Physical Sciences Building (15:30-16:00)
Session 13 - Physical Sciences Auditorium (16:00-17:00) time title 16:00 Quantum Simulators of Lattice Gauge Theories Presenter: LEWENSTEIN, Maciej After a short introduction devoted to the general aspects of the theory of quantum simulators, I will discuss recent theoretical and experimental developments toward the realization simulators of lattice gauge fields and lattice gauge theories with ultracold atoms, ions, molecules or Rydberg atoms. Particular attention will be paid to external non-Abelian gauge field that lead to various types of topological states, and to quantum simulators of non-Abelian gauge theories.
16:30 Phases, Transitions and Boundary Conditions in a Model of Interacting Bosons Presenter: PAI, Ramesh We study the extended Bose Hubbard model in one dimension using the density matrix renormalization group. We find a variety of phases at commensurate filling: Superfluid, Mott insulator, density wave and Haldane insulator. In particular we deterimine the universality classes of the transitions between the different phases by obtaining the relevant critical exponents. We show that there exist Ising, Kosterlitz-Thouless and Gaussian phase transitions in addition to a discontinuous phase transition. We also highlight the importance of boundary conditions, showing that different ones which correspond to the same conventional thermodynamic limit can give different phase diagrams.
Free time - Physical Sciences Building (17:00-18:00)
Cultural Programme - J.R.D. Tata Auditorium (18:00-20:00)
Dinner - Green House (20:00-21:30)
Page 11 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Friday 11 January 2013
Friday 11 January 2013
Session 14 - Faculty Hall, Main Building (09:00-10:30) time title 09:00 Quantum Simulation of Exactly Solvable Models Presenter: KOREPIN, Vladimir We consider one dimensional models of may body quantum mechanics. Matrix product states provide a good approximation for the ground state. Analytical expression exist for the ground state of some models. We reformulated tensor networks so that they give the exact formula, when that is available.
09:45 Optical Communications at the Quantum Limit Presenter: DUTTON, Zachary In the last decade, significant progress has been made towards understanding the fundamental limits of classical communication on optical channels, with the Holevo bound giving am achievable quantum bound to the classical capacity. Remarkably, coherent (laser) states of light are sufficient to achieve this capacity. However, non-standard and heretofore unknown receivers and coding are needed to achieve this capacity. In this talk I will discuss our recent theoretical and experimental work on joint detection receivers, which perform joint quantum measurements across multiple pulses, as well as associated coding techniques. In particular I will present our demonstration of the conditional pulse nulling receiver with demodulation error rate of pulse-position modulation codewords below the standard quantum limit, and our development of the Green Machine, able to increase the capacity of coded binary-phase-shift-keyed (BPSK) modulation. I will also discuss our recent theoretical breakthrough on a receiver concept to achieve the minimum-probability-of-error in discrimination of an arbitrary number of coherent states. These techniques can be applied in future communications systems to reduce coding latency and greatly increasing the power efficiency (bits per photon).
Tea/coffee break - Faculty Hall Foyer, Main Building (10:30-11:00)
Session 15 - Faculty Hall, Main Building (11:00-12:30) time title 11:00 Study of Nanomechanical Two-level Systems: Possibility of Studying Coherent Control Presenter: DESHMUKH, Mandar We study InAs nanowire resonators fabricated on sapphire substrate with a local gate configuration. The key advantage of using an insulating sapphire substrate is that it results in a reduced parasitic capacitance, thus allowing both wide bandwidth actuation and detection using a network analyzer as well as signal detection at room temperature. Both in-plane and out of-plane vibrational modes of the nanowire can be driven and the energy difference between the two "states" controlled. The two in plane and out of plane modes can be treated as a classical two level system. We will discuss the possibility of studying coherent control of such a nanomechanical system following the work of Faust et al. (arXiv:1212.3172v1).
11:30 Molecular Route to Spin Memory Devices Presenter: V RAMAN, Karthik Using the spin state of a molecule as a quanta of information for storage, sensing and computing has generated considerable interest in building next-generation data storage and communication devices. Extensive research on single molecular magnets (SMMs) and molecules with metal ion or nitrogen vacancy as spin carrying centers for storage and for realizing quantum logic operations have been performed. However in such systems, the strong localization of spin makes superposition of quantum states a challenging task. In contrast, delocalized carbon based radical species with unpaired spin such as phenalenyl show promise as building blocks for the construction of quantum registers. These phenalenyl ligands, envisaged as mini-graphene fragment, are formed by the fusion of three benzene rings. The spin structure of these molecules respond to external stimuli (such as light, electric and magnetic fields), which provide novel schemes for quantum computing. Here, we construct a molecular device using such molecules as templates to engineer the interfacial spin transfer resulting from hybridization and magnetic exchange interaction with a ferromagnet (FM) surface showing an unexpected interfacial magnetoresistance of over 20% near room temperature. Moreover, we successfully demonstrate the formation of a nanoscale magnetic molecule with a well-defined magnetic hysteresis on FM surfaces. Such independent switching of the adsorbed magnetic molecule has been unsuccessful with SMMs. These findings suggest the use of phenalenyl based molecules as an excellent platform for building room temperature molecular-scale quantum spin memory and processors, opening avenues for developing multifunctional molecular spintronics.
Page 12 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Friday 11 January 2013
12:00 Quantum Automata and their Power Presenter: GRUSKA, Jozef The talk will discuss various models of quantum automata and their power, relations among them and also relation to the classical probabilistic automata. Concentration will be on models that should well simulate small memory quantum devices.
Lunch - Guest House Lawns (12:30-14:00)
Session 16 - Faculty Hall, Main Building (14:00-15:30) time title 14:00 Does a quantum particle know its own energy? Presenter: SORKIN, Rafael If a wave function does not describe microscopic reality then what does? Reformulating quantum mechanics in path-integral terms leads to a notion of "precluded event" and thence to the proposal that quantal reality differs from classical reality in the same way as a set of worldlines differs from a single worldline. One can then ask, for example, which sets of electron trajectories correspond to a Hydrogen atom in its ground state and how they differ from those of an excited state. I will answer the analogous questions for simple model that replaces the electron by a particle hopping (in discrete steps) on a circular lattice.
14:30 Weak Measurement and Sub-Planck Structure Presenter: PANIGRAHI, Prasanta We investigate the structure of the meter states used for weak measurement and find its connection with sub-Planck structures present in mesoscopic superposition of classical states. It is observed that the parameter regime where sub-Planck structure is present in the phase-space, is not conducive for weak measurement. The relevance for Quantum Metrology is pointed out.
15:00 Reading and Manipulating Valley Quantum States in Graphene Presenter: GHOSH, Arindam In mesoscopic disordered metals, when the sample size is smaller or of the order of the phase coherence length, the electrical conductance fluctuates with a universal magnitude \sim e^2/h as a function of Fermi energy, magnetic field or disorder, irrespective of material properties, device geometry or dimensionality. Such "universality" of mesoscopic conductance fluctuations in graphene is however more complex, because of the existence of valleys in graphene. Experimentally, very little is known on the influence of valleys on the mesoscopic fluctuations, although it has been theoretically suggested that it can become a direct probe to study the valley degeneracy and inter/intra-valley scattering processes. Here we show that the magnitude of mesoscopic conductance fluctuations in graphene increases four times near the Dirac point compared to the high density regime, indicating a density dependent crossover from orthogonal to symplectic universality class. Since the valleys represent a spin-like quantity, it allows the valley degree of freedom to be a new physical resource for a wide variety of applications, ranging from valley-based quantum computation, to valley filters or polarizers, and in this context our experiments provide a new access to study and exploit valley coherent regime in graphene.
Tea/coffee break - Faculty Hall Foyer, Main Building (15:30-16:00)
Session 17 - Faculty Hall, Main Building (16:00-17:00) time title 16:00 Panel Discussion on the Future of Quantum Computation
Conclusion - Faculty Hall, Main Building (17:00-17:15)
Vote of thanks - Faculty Hall, Main Building (17:00-17:15)
- Presenters: Prof. PATEL, Apoorva
Free time - Main Building (17:15-19:00)
Page 13 International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme Friday 11 January 2013
Dinner - Guest House Lawns (19:00-20:30)
Page 14 List of Posters
Ms. ASHOURISHEIKHI, Sakineh Local Unitary equivalent classes of N-qubits mixed 1 University of Mysore Symmetric states Ms. BAGCHI, Shrobona 2 Remote state preparation in relativistic scenario Harish-Chandra Research Institute Recent observations on secure direct quantum Dr. BANERJEE, Anindita 3 communication: Maximally efficient protocols with Bose Institute minimal resources Mr. BANERJI, Anindya Quadrature Uncertainty and Information Entropy of 4 West Bengal University of Technology Quantum Elliptical Vortex States Multisite Entanglement acts as a Better Indicator of Dr. BERA, Manabendra Nath 5 Quantum Phase Transitions in Spin Models with Harish-Chandra Research Institute Three-spin Interactions Mr. CHATTERJEE, Sourav 6 Correlating Capability of Non Local Hamiltonian IIIT Hyderabad Dr. COLLINS, David Correlated quantum states and enhanced mixed 7 Colorado Mesa University state Pauli channel parameter estimation Mr. DEMARIE, Tommaso Topological Entropy with Continuous Variable 8 Macquarie University modes on a 2D Lattice Mr. DESHPANDE, Abhishek Quantum Correlation Vector: A Unified Approach 9 IIIT Hyderabad of Multiparty Quantum Correlation Mr. DEY, Amit 10 Decoherence in an infinite range Heisenberg model Saha Institute Of Nuclear Physics Mr. DEY, Ansuman Fine-grained uncertainty relation and biased non- 11 S N Bose National Centre for Basic Sciences local games in bipartite and tripartite systems Generation of three qubit generic pure state and Ms. DOGRA, Shruti 12 their tomographic reconstruction from the two party IISER Mohali reduced states using NMR. Dr. GOYAL, Sandeep 13 Quantum walks in classical systems The University of KwaZulu-Natal Mr. GUPTA, Gyaneshwar Quantum Teleportation of Higher(2nd) Order 14 DDU Gorakhpur University Optically Polarized State Mr. H S, Karthik Can quantum probabilities be retrieved from their 15 Raman Research Institute moments? Ms. HEGDE, Swathi 16 Engineering Decoherence IISER Pune Mr. IEMINI, Fernando Quantum Correlations Measures in Systems of 17 Universidade Federal de Minas Gerais Indistinguishable Particles Mr. JASEEM, Noufal The best initial state for a quantum limited 18 IISER Thiruvananthapuram measurement Ms. JOSE, Salini Quantum Enhanced Measurements using Bose 19 IISER Thiruvananthapuram Einstein Condensates Mr. J, Prabhu Tej Quantum reading of digital memory with non- 20 Bangalore University Gaussian entangled light Mr. K P, Nagarjun Lyapunov Control of Quantum Systems with 21 CQIQC, IISc Applications to Quantum Computing Monogamy of quantum correlations reveals Mr. KAMINENI, Rama Koteswara Rao 22 frustration in quantum spin models: Experimental Indian Institute of Science demonstration in NMR Mr. KATIYAR, Hemant Quantum Correlations: Evolution, Stability and 23 IISER Pune Entropic Leggett-Garg Inequality Ms. K, Salini All Multiparty Quantum States Can Be Made 24 IISER Thiruvananthapuram Monogamous Dr. KULKARNI, Manas Dynamics of Large Quantum Systems: 25 Princeton University Equilibration, Thermalization and Interactions. Mr. KUMAR, Santosh Controllable quantum gates in a fiber coupled atom- 26 Jawaharlal Nehru University cavity system Ms. LEE, Seunghyun 27 Atom-ion and molecule-ion physics of ions. Raman Research Institute Mr. MACIEL, Thiago Analects on quantum tomographies and inference 28 Universidade Federal de Minas Gerais schemes Mr. MAL, Shiladitya Detecting mixedness of qutrit systems using the 29 S N Bose National Centre for Basic Sciences uncertainty principle Dr. MISHRA, Devendra Kumar Unambiguous discrimination of two squeezed states 30 V S Mehta College of Science using probabilistic quantum cloning Mr. MISHRA, Utkarsh Macroscopic Schrodinger Cat Resistant to Particle 31 Harish-Chandra Research Institute Loss and Local Decoherence Mr. MISRA, Avijit 32 Correlating capability of non-local Hamiltonians Harish-Chandra Research Institute Mr. MURALEEDHARAN, Gopikrishnan 33 DQC1 as a concordant computation IISER Thiruvananthapuram Dr. NARAYANAN, Andal Heat bath effects on the violation of Leggett-Garg 34 Raman Research Institute Inequalities Mr. PRAMANIK, Tanumoy Fine-grained uncertainty relation and nonlocality of 35 S N Bose National Centre for Basic Sciences tripartite systems Dr. QURESHI, Tabish 36 Quantum Twist to Complementarity Jamia Millia Islamia Dynamics of nonclassical light in integrated Dr. RAI, Amit 37 nonlinear waveguide arrays and generation of CQT, National University of Singapore robust continuous-variable entanglement Mr. RAI, Ashutosh Local simulation of singlet statistics for restricted 38 S N Bose National Center for Basic Sciences set of measurement Mr. ROY BARDHAN, Bhaskar Quantum Dynamical Decoupling to Enhance Spin 39 Louisiana State University Squeezing in a Dephasing Bath Dr. R, Prabhu Exclusion principle for multi-port quantum dense 40 Harish-Chandra Research Institute coding: qualitative and quantitative aspects Mr. S K, Sazim A Study of Teleportation and Super Dense Coding 41 Institute of Physics capacity in Remote Entanglement Distribution Dr. S V M, Satyanarayana A new two qubit mixed state for teleportation with 42 Pondicherry University improved fidelity Prof. SAMUEL, Joseph Controlling Entanglement using the Geometric 43 Raman Research Institute Phase Dr. SARVEPALLI, Pradeep 44 Topological subsystem codes from hypergraphs Indian Institute of Technology Madras Mr. SAWANT, Rahul Quantifying Multi-Path Effects in Three-Slit 45 Raman Reserach Institute Interference Generating new entanglement witnesses by Mr. SENGUPTA, Ritabrata 46 composition of extermal positive but not IISER Mohali completely maps with n-super-positive maps Dr. SHAJI, Anil On the role of non classical correlations in quantum 47 IISER Thiruvananthapuram computational speed up Ms. SHENOY, Akshata 48 Device-independent quantum information splitting Indian Institute of Science Mr. SHUKLA, Abhishek Simulating Interaction-Free Measurements and 49 IISER Pune Noise-Spectroscopy by NMR Ms. SHUKLA, Chitra Hierarchical quantum information splitting using 4- 50 Jaypee Institute of Information Technology qubit entangled states Mr. SOORAT, Ram Polarization Shift Keying for free space QKD: 51 University of Hyderabad Effect of noise on reliability of the QKD protocols Mr. SRIKRISHNA, Omkar S The operator sum-difference representation for the 52 Poornaprajna Institute of Scientific Research two-qubit amplitude damping channel Mrs. V K O, Yashodamma Is composite noise necessary for sudden death of 53 Kuvempu University entanglement? Mr. V S, Manu Quantum Simulation of Dzyaloshinsky-Moriya 54 Indian Institute of Science Interaction Mr. VANARASA, Chiranjeevi Fault tolerant establishment of Entanglement in 55 IIIT Hyderabad arbitrary Quantum Networks Dr. VINJANAMPATHY, Sai 56 Quantum Steering as a Quantum Game CQT, National University of Singapore Mr. XIA, Bichang 57 Relative entropy of quantum entangled state City University of Hong Kong Mr. YESHWANTH, Sunil 58 Equilibration times in clean and noisy systems University of Southern California Xpressions
This is an introduction to the two star artistes who will be collaborating on the 10 th of January 2013 at the International Conference on Quantum Information and Quantum Computing at the Indian Institute of Science, Bangalore. Dr. Jayanthi Kumaresh on the Veena and the danseuse Smt.Priyadarsini Govind. Both these artistes are very renowned in their respective fields of classical music and dance. This collaboration is special and is expected to bring out synergies of expressions and creativity.
Dr. Jayanthi Kumaresh has been enthralling audiences the world over with her graceful, emotive and expressive music for the last 25 years. The Statesman, a well acclaimed daily quotes that Jayanthi is "The best and most versatile Veena artiste we have today."
Born into a family where music has been the mainstay for the last seven generations, Jayanthi started playing the Veena when she was barely 3. Winning her way through several laurels and awards right from her childhood, Jayanthi was soon one of the youngest artistes in Veena to receive the A-TOP grading from the All India Radio (the highest grade offered by the only grading body in India). In recognition of her artistry, the Government of Tamilnadu has honoured her with the title of Kalaimamani. She has also been the recipient of prestigious awards like the 'Best Main Musician', 'Best Veena concert of the year', 'Sathyashree', 'Veena Nada Mani' and the like.
Jayanthi has been invited by prestigious organisations across the world like the Theatre de la Ville in Paris, the UN and the World Music Centre in New York, the Music Guimet in Paris, the Woodstock in United States, the Indo-German Societies, the Indian embassy at Sharjah and several such platforms to represent the National instrument of India – the Saraswathi Veena. Jayanthi has performed in USA, UK, Australia, New Zealand, Singapore, Malaysia, Mauritius, Luxembourg, Canada, Germany, France, Netherlands, Norway, Switzerland to name a few.
Jayanthi has recorded several CDs for companies all over the world like Times Music, Music Today, Sense World, Earthsync, Navras, Home Records etc. Jayanthi was awarded a Doctorate by the University of Mysore for her work on the subject "Analytical study of different Banis and playing techniques of the Saraswathi Veena".
She will be accompanied by Sri Jayachandra Rao on the Mridangam and Sri Pramath Kiran on Morching and Percussion. Smt. Priyadarsini Govind is today one of the foremost exponents of the Bharatanatyam in India today. For Priyadarsini Govind, Bharatanatyam has been her first love ever since she was six. After initial grooming, Priyadarsini specialized in abhinaya under 'Padma Bhushan' Smt. Kalanidhi Narayanan from the age of nine. Priyadarsini received advanced training in Bharatanatyam under Guru Swamimalai K. Rajaratnam, exponent of the Vazhvoor School from the age of ten. Priyadarsini imbibes the best of both her teachers. Priyadarsini has been giving recitals from the age of sixteen, and has performed in numerous prestigious academies in India and abroad.
This Chennai based dancer is a delight to watch, selected to dance at the prestigious Festival of India in Paris, in 1985 at the age of 20, Priyadarsini had several occasions after that to showcase her artistry---the Swarna Samaroh, celebrating 50 years of Indian Independence organized by the Sangeet Natak Academy, the Khajuraho Dance Festival and the like. Priyadarsini also holds the title of 'Kalaimamani' awarded by the Government of Tamil Nadu in 1998, an award given for artistic excellence.
Priyadarsini has performed extensively in Europe, besides in countries like the USA, Tunisia, South Africa and even Afghanistan, under the ICCR banner and on invitation by the French Government at the Parc de Villette Festival in Paris. Registered Participants
Prof. ACHANTA, Venu Gopal Tata Institute of Fundamental Research 1 [email protected] Mumbai, INDIA Prof. AGARWAL, Girish Oklahoma State University 2 [email protected] Stillwater, UNITED STATES OF AMERICA Mr. AJOY, Ashok Massachusetts Institute of Technology 3 [email protected] Cambridge, UNITED STATES OF AMERICA Prof. ARVIND, . IISER Mohali 4 [email protected] Mohali, INDIA Ms. ASHOURISHEIKHI, Sakineh University of Mysore 5 [email protected] Mysore, INDIA Ms. BAGCHI, Shrobona Harish-Chandra Research Institute 6 [email protected] Allahabad, INDIA Dr. BANDYOPADHYAY, Jayendra BITS-Pilani, Pilani Campus 7 [email protected] Pilani, INDIA Dr. BANERJEE, Anindita Bose Institute 8 [email protected] Kolkata, INDIA Mr. BANERJI, Anindya West Bengal University of Technology 9 [email protected] Hooghly, INDIA Dr. BERA, Manabendra Nath Harish-Chandra Research Institute 10 [email protected] Allahabad, INDIA Prof. BRASSARD, Gilles University of Montreal 11 [email protected] Montreal, CANADA Mr. CHATTERJEE, Sourav IIIT Hyderabad 12 [email protected] Hyderabad, INDIA Prof. CHATURVEDI, Subhash University of Hyderabad 13 [email protected] Hyderabad, INDIA Dr. COLLINS, David Colorado Mesa University 14 [email protected] Grand Junction, Colorado, UNITED STATES OF AMERICA Mr. DAS, Debmalya IISER Mohali 15 [email protected] Mohali, INDIA Mr. DEMARIE, Tommaso Macquarie University 16 [email protected] Sydney, AUSTRALIA Dr. DESHMUKH, Mandar Tata Institute of Fundamental Research 17 [email protected] Mumbai, INDIA Mr. DESHPANDE, Abhishek IIIT Hyderabad 18 [email protected] Hyderabad, INDIA Mr. DEY, Amit Saha Institute Of Nuclear Physics 19 [email protected] Kolkata, INDIA Mr. DEY, Ansuman S N Bose National Centre for Basic Sciences 20 [email protected] Kolkata, INDIA Ms. DOGRA, Shruti IISER Mohali 21 [email protected] Mohali, INDIA Dr. DU, Jiangfeng University of Science and Technology of China 22 [email protected] Hefei, CHINA Dr. DUTTON, Zachary Raytheon BBN Technologies 23 [email protected] Arlington, UNITED STATES OF AMERICA Prof. GHOSH, Arindam Indian Institute of Science 24 [email protected] Bangalore, INDIA Dr. GOYAL, Sandeep The University of KwaZulu-Natal 25 [email protected] Durban, SOUTH AFRICA Prof. GRUSKA, Jozef Masaryk University 26 [email protected] Brno, CZECH REPUBLIC Mr. GUDAPATI, Naresh Raghava CQIQC, IISc 27 [email protected] Bangalore, INDIA Mr. GUPTA, Gyaneshwar DDU Gorakhpur University 28 [email protected] Gorakhpur, INDIA Mr. H S, Karthik Raman Research Institute 29 [email protected] Bangalore, INDIA Mr. HEGDE, Subramanya University of Mysore 30 [email protected] Mysore, INDIA Ms. HEGDE, Swathi IISER Pune 31 [email protected] Pune, INDIA Mr. IEMINI, Fernando Universidade Federal de Minas Gerais 32 [email protected] Belo Horizonte, BRAZIL Mr. JASEEM, Noufal IISER Thiruvananthapuram 33 [email protected] Thiruvananthapuram , INDIA Prof. JENNEWEIN, Thomas IQC, University of Waterloo 34 [email protected] Waterloo, CANADA Prof. JOAG, Pramod University of Pune 35 [email protected] Pune, INDIA Ms. JOSE, Salini IISER Thiruvananthapuram 36 [email protected] Thiruvananthapuram, INDIA Mr. J, Prabhu Tej Bangalore University 37 [email protected] Bangalore, INDIA Mr. K P, Nagarjun CQIQC, IISc 38 [email protected] Bangalore, INDIA Prof. K V, Ramanathan Indian Institute of Science 39 [email protected] Bangalore, INDIA Mr. KAMINENI, Rama Koteswara Rao Indian Institute of Science 40 [email protected] Bangalore, INDIA Mr. KATIYAR, Hemant IISER Pune 41 [email protected] Pune, INDIA Prof. KIM, Jaewan Korea Institute for Advanced Study 42 [email protected] Seoul, REPUBLIC OF KOREA Prof. KOREPIN, Vladimir YITP, Stony Brook University 43 [email protected] Stony Brook, UNITED STATES OF AMERICA Dr. KOTA, Murali IBM India Research Laboratory 44 [email protected] Bangalore, INDIA Ms. K, Salini IISER Thiruvananthapuram 45 [email protected] Thiruvananthapuram, INDIA Dr. KULKARNI, Manas Princeton University 46 [email protected] Princeton, UNITED STATES OF AMERICA Mr. KUMAR, Amit Samsung 47 [email protected] Bangalore ., INDIA Prof. KUMAR, Anil Indian Institute of Science 48 [email protected] Bangalore, INDIA Mr. KUMAR, Santosh Jawaharlal Nehru University 49 [email protected] Delhi, INDIA Ms. KUNDU, Srijita Chennai Mathematical Institute 50 [email protected] Chennai, INDIA Prof. LAFLAMME, Raymond IQC, University of Waterloo 51 [email protected] Waterloo, CANADA Ms. LEE, Seunghyun Raman Research Institute 52 [email protected] Bangalore, INDIA Prof. LEWENSTEIN, Maciej ICFO---Institute of Photonic Sciences 53 [email protected] Castelldefels (Barcelona), SPAIN Prof. LYON, Stephen Princeton University 54 [email protected] Princeton, UNITED STATES OF AMERICA Mr. MACIEL, Thiago Universidade Federal de Minas Gerais 55 [email protected] Belo Horizonte, BRAZIL Prof. MAJUMDAR, Archan S. S N Bose National Centre for Basic Sciences 56 [email protected] Kolkata, INDIA Mr. MAL, Shiladitya S N Bose National Centre for Basic Sciences 57 [email protected] Kolkata, INDIA Dr. MANDAYAM, Prabha Institute of Mathematical Sciences 58 [email protected] Chennai, INDIA Dr. MISHRA, Devendra Kumar V S Mehta College of Science 59 [email protected] Allahabad, INDIA Mr. MISHRA, Utkarsh Harish-Chandra Research Institute 60 [email protected] Allahabad, INDIA Mr. MISRA, Avijit Harish-Chandra Research Institute 61 [email protected] Allahabad, INDIA Prof. MOODERA, Jagadeesh Massachusetts Institute of Technology 62 [email protected] Cambridge, UNITED STATES OF AMERICA Dr. MUKERJEE, Subroto Indian Institute of Science 63 [email protected] Bangalore, INDIA Mr. MURALEEDHARAN, Gopikrishnan IISER Thiruvananthapuram 64 [email protected] Thiruvananthapuram, INDIA Prof. N D, Hari Dass Chennai Mathematical Institute 65 [email protected] Chennai, INDIA Dr. NARAYANAN, Andal Raman Research Institute 66 [email protected] Bangalore, INDIA Prof. NATARAJAN, Vasant Indian Institute of Science 67 [email protected] Bangalore, INDIA Prof. NAYAK, Ashwin University of Waterloo 68 [email protected] Waterloo, CANADA Prof. N, Mukunda Indian Academy of Sciences 69 [email protected] Bangalore, INDIA Prof. P S, Anil Kumar Indian Institute of Science 70 [email protected] Bangalore, INDIA Prof. PAI, Ramesh Goa University 71 [email protected] Panaji, INDIA Prof. PANDIT, Rahul Indian Institute of Science 72 [email protected] Bangalore, INDIA Prof. PANIGRAHI, Prasanta IISER Kolkata 73 [email protected] Kolkata, INDIA Prof. PATEL, Apoorva Indian Institute of Science 74 [email protected] Bangalore, INDIA Prof. PATI, Arun Harish-Chandra Research Institute 75 [email protected] Allahabad, INDIA Mr. PRAMANIK, Tanumoy S N Bose National Centre for Basic Sciences 76 [email protected] Kolkata, INDIA Dr. QURESHI, Tabish Jamia Millia Islamia 77 [email protected] New Delhi, INDIA Dr. RAI, Amit CQT, National University of Singapore 78 [email protected] SINGAPORE Mr. RAI, Ashutosh S N Bose National Center for Basic Sciences 79 [email protected] Kolkata, INDIA Mr. RAY, Tridib Raman Research Institute 80 [email protected] Bangalore, INDIA Mr. ROY BARDHAN, Bhaskar Louisiana State University 81 [email protected] Baton Rouge, UNITED STATES OF AMERICA Dr. R, Prabhu Harish-Chandra Research Institute 82 [email protected] Allahabad, INDIA Mr. S K, Sazim Institute of Physics 83 [email protected] Bhubaneswar, INDIA Dr. S V M, Satyanarayana Pondicherry University 84 [email protected] Puducherry, INDIA Mr. SAMANTARAY, Nigam Physical Research Laboratory 85 [email protected] Ahmedabad, INDIA Prof. SAMUEL, Joseph Raman Research Institute 86 [email protected] Bangalore, INDIA Prof. SANDERS, Barry University of Calgary 87 [email protected] Calgary, CANADA Mr. SARANGI, Pratik Kumar CQIQC, IISc 88 [email protected] Bangalore, INDIA Dr. SARVEPALLI, Pradeep Indian Institute of Technology Madras 89 [email protected] Chennai, INDIA Mr. SAWANT, Rahul Raman Reserach Institute 90 [email protected] Bangalore, INDIA Dr. SEN DE, Aditi Harish-Chandra Research Institute 91 [email protected] Allahabad, INDIA Prof. SEN, Diptiman Indian Institute of Science 92 [email protected] Bangalore, INDIA Mr. SENGUPTA, Ritabrata IISER Mohali 93 [email protected] Mohali, INDIA Dr. SEN, Ujjwal Harish-Chandra Research Institute 94 [email protected] Allahabad, INDIA Dr. SHAJI, Anil IISER Thiruvananthapuram 95 [email protected] Thiruvananthapuram, INDIA Ms. SHENOY, Akshata Indian Institute of Science 96 [email protected] Bangalore, INDIA Mr. SHUKLA, Abhishek IISER Pune 97 [email protected] Pune, INDIA Ms. SHUKLA, Chitra Jaypee Institute of Information Technology 98 [email protected] Noida, INDIA Prof. SIMON, Rajiah Institute of Mathematical Sciences 99 [email protected] Chennai, INDIA Prof. SINHA, Supurna Raman Research Institute 100 [email protected] Bangalore, INDIA Dr. SINHA, Urbasi Raman Research Institute 101 [email protected] Bengaluru, INDIA Mr. SOORAT, Ram University of Hyderabad 102 [email protected] Hyderabad, INDIA Prof. SORKIN, Rafael Perimeter Institute for Theoretical Physics 103 [email protected] Waterloo, CANADA Mr. SRIKRISHNA, Omkar S Poornaprajna Institute of Scientific Research 104 [email protected] Bangalore, INDIA Mr. SRINIVASAMURTHY, Aravinda Poornaprajna Institute of Scientific research 105 [email protected] Bangalore, INDIA Prof. SUDARSHAN, E C George University of Texas at Austin 106 [email protected] Austin, UNITED STATES OF AMERICA Dr. SUDHA Kuvempu University 107 [email protected] Shimoga, INDIA Dr. SVERDLOV, Roman IISER Mohali 108 [email protected] Mohali, INDIA Dr. T S, Mahesh IISER Pune 109 [email protected] Pune, INDIA Mr. THOMAS, George IISER Mohali 110 [email protected] Mohali, INDIA Dr. V RAMAN, Karthik IBM India Research Laboratory 111 [email protected] Bangalore, INDIA Mr. V S, Manu Indian Institute of Science 112 [email protected] Bangalore, INDIA Ms. V, Anjani Priyadarsini Indian Institute of Science 113 [email protected] Bangalore, INDIA Mr. VANARASA, Chiranjeevi IIIT Hyderabad 114 [email protected] Hyderabad, INDIA Dr. VIJAYARAGHAVAN, Rajamani Tata Institute of Fundamental Research 115 [email protected] Mumbai, INDIA Mrs. V K O, Yashodamma Kuvempu University 116 [email protected] Shimoga, INDIA Dr. VINJANAMPATHY, Sai CQT, National University of Singapore 117 [email protected] SINGAPORE Mr. V, Ranjith CQIQC, IISc 118 [email protected] Bengalooru, INDIA Dr. VUDAYAGIRI, Ashok University of Hyderabad 119 [email protected] Hyderabad, INDIA Prof. WEIHS, Gregor University of Innsbruck 120 [email protected] Innsbruck, AUSTRIA Mr. XIA, Bichang City University of Hong Kong 121 [email protected] Hong Kong , CHINA Prof. YAMAMOTO, Yoshihisa National Institute of Informatics 122 [email protected] Tokyo, JAPAN Mr. YESHWANTH, Sunil University of Southern California 123 [email protected] Los Angeles, UNITED STATES OF AMERICA Prof. YUSA, Go Tohoku University 124 [email protected] Sendai, JAPAN
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