Sunil Mukhi April 2018
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Summary of Indian Strings Meeting 2007
Conference Statistics The Talks Summary of Indian Strings Meeting 2007 Sunil Mukhi, TIFR HRI, Allahabad October 15-19 2007 Sunil Mukhi, TIFR Summary of Indian Strings Meeting 2007 Conference Statistics The Talks Outline 1 Conference Statistics 2 The Talks Sunil Mukhi, TIFR Summary of Indian Strings Meeting 2007 There were 3 discussion sessions of 90 minutes each. At four full days (Monday afternoon – Friday lunch) this must be the shortest ISM ever! Conference Statistics The Talks Conference Statistics This conference featured 27 talks: 4 × 90 minutes 23 × 30 minutes Sunil Mukhi, TIFR Summary of Indian Strings Meeting 2007 At four full days (Monday afternoon – Friday lunch) this must be the shortest ISM ever! Conference Statistics The Talks Conference Statistics This conference featured 27 talks: 4 × 90 minutes 23 × 30 minutes There were 3 discussion sessions of 90 minutes each. Sunil Mukhi, TIFR Summary of Indian Strings Meeting 2007 Conference Statistics The Talks Conference Statistics This conference featured 27 talks: 4 × 90 minutes 23 × 30 minutes There were 3 discussion sessions of 90 minutes each. At four full days (Monday afternoon – Friday lunch) this must be the shortest ISM ever! Sunil Mukhi, TIFR Summary of Indian Strings Meeting 2007 IOPB, IMSc and SINP were out for a ! South Zone and East Zone were very scarcely represented. Conference Statistics The Talks The scorecard for the talks was as follows: Institute Faculty Postdocs Students Total HRI 4 3 5 12 TIFR 3 3 2 8 IIT-K 1 0 1 2 Utkal 1 0 0 1 IIT-R 1 0 0 1 IIT-M 0 0 1 1 IACS 0 0 1 1 Kings 1 0 0 1 Total 11 6 10 27 Sunil Mukhi, TIFR Summary of Indian Strings Meeting 2007 South Zone and East Zone were very scarcely represented. -
Mathematical Physics and String Theory
TIFR Annual Report 2001-02 THEORETICAL PHYSICS String Theory and Mathematical Physics Tachyon Condensation and Black Hole Entropy Condensation of tahcyons in closed string theory was analyzed and its connection with the computation of the black hole entropy was pointed out. The entropy computed in this manner was found to be in precise agreement with the the Bekenstein-Hawking Entropy. [Atish Dabholkar] Tachyon Potential and C-function A tachyon potential with the appropriate critical points was proposed in terms of an effective c-function of the worldsheet theory and it was determined as a solution of certain integrable equations. [Atish Dabholkar and C. Vafa of Harvard University] D-branes in PP-wave Backgrounds Dirichlet branes in the background of a PP wave were constructed and the open string spectrum was in agreement with the gauge theory spectrum. [Atish Dabholkar and Sharoukh Parvizi] Loop Equation and Wilson Line Correlators in Non-commutative Gauge Theories Loop equations for correlators of Wilson line operators in non-commutative gauge theories were derived. Unlike what happens for closed Wilson loops, the joining term survives in the planar equations. This fact was used to obtain a NEW loop equation which relates the correlation function of an arbitrary number of Wilson lines to a set of closed Wilson loops, obtained by joining the individual Wilson lines together by a series of well-defined cutting and joining manipulations. For closed loops, we showed that the non-planar contributions do not have a smooth limit in the limit of vanishing non-commutativity and hence the equations do not reduce to their commutative counterparts [Avinash Dhar and Y. -
IISER AR PART I A.Cdr
dm{f©H$ à{VdoXZ Annual Report 2016-17 ^maVr¶ {dkmZ {ejm Ed§ AZwg§YmZ g§ñWmZ nwUo Indian Institute of Science Education and Research Pune XyaX{e©Vm Ed§ bú` uCƒV‘ j‘Vm Ho$ EH$ Eogo d¡km{ZH$ g§ñWmZ H$s ñWmnZm {Og‘| AË`mYw{ZH$ AZwg§YmZ g{hV AÜ`mnZ Ed§ {ejm nyU©ê$n go EH$sH¥$V hmo& u{Okmgm Am¡a aMZmË‘H$Vm go `wº$ CËH¥$ï> g‘mH$bZmË‘H$ AÜ`mnZ Ho$ ‘mÜ`m‘ go ‘m¡{bH$ {dkmZ Ho$ AÜ``Z H$mo amoMH$ ~ZmZm& ubMrbo Ed§ Agr‘ nmR>çH«$‘ VWm AZwg§YmZ n[a`moOZmAm| Ho$ ‘mÜ`‘ go N>moQ>r Am`w ‘| hr AZwg§YmZ joÌ ‘| àdoe& Vision & Mission uEstablish scientific institution of the highest caliber where teaching and education are totally integrated with state-of-the-art research uMake learning of basic sciences exciting through excellent integrative teaching driven by curiosity and creativity uEntry into research at an early age through a flexible borderless curriculum and research projects Annual Report 2016-17 Correct Citation IISER Pune Annual Report 2016-17, Pune, India Published by Dr. K.N. Ganesh Director Indian Institute of Science Education and Research Pune Dr. Homi J. Bhabha Road Pashan, Pune 411 008, India Telephone: +91 20 2590 8001 Fax: +91 20 2025 1566 Website: www.iiserpune.ac.in Compiled and Edited by Dr. Shanti Kalipatnapu Dr. V.S. Rao Ms. Kranthi Thiyyagura Photo Courtesy IISER Pune Students and Staff © No part of this publication be reproduced without permission from the Director, IISER Pune at the above address Printed by United Multicolour Printers Pvt. -
Star Products from Commutative String Theory
hep-th/0108072 TIFR/TH/01-28 Star Products from Commutative String Theory Sunil Mukhi Tata Institute of Fundamental Research, Homi Bhabha Rd, Mumbai 400 005, India ABSTRACT A boundary-state computation is performed to obtain derivative corrections to the Chern-Simons coupling between a p-brane and the RR gauge potential Cp−3. We work to quadratic order in the gauge field strength F , but all orders in derivatives. In a certain limit, which requires the presence of a constant B-field background, it is found that these corrections neatly sum up into the product of (commutative) gauge fields. The result ∗2 is in agreement with a recent prediction using noncommutativity. arXiv:hep-th/0108072v1 10 Aug 2001 August 2001 Introduction In a recent paper[1] it was shown that the noncommutative formulation of open-string theory can actually give detailed information about ordinary commutative string theory. Once open Wilson lines are included in the noncommutative action, one has exact equality of commutative and noncommutative actions including all α′ corrections on both sides. As a result, a lot of information about α′ corrections on the commutative side is encoded in the lowest-order term (Chern-Simons or DBI) on the noncommutative side, and can be extracted explicitly. The predictions of Ref.[1] were tested against several boundary-state computations in commutative open-string theory performed in Ref.[2], and impressive agreement was found. The latter calculations were restricted to low-derivative orders, largely because the boundary-state computation becomes rather tedious when we go to high derivative order. However, in some specific cases, particularly when focusing on Chern-Simons couplings in the Seiberg-Witten limit[3], the predictions from noncommutativity in Ref.[1] are simple and elegant to all derivative orders as long as we work with weak field strengths (quadratic order in F ). -
Schedule Titles and Zoom Links: Please Note That IST = UTC + 5:30
The Dual Mysteries of Gauge Theories and Gravity IIT Madras 2020 Schedule Titles and zoom links: Please note that IST = UTC + 5:30 Mon, Oct 19, Session 1: Chair: Suresh Govindarajan 09:00--9:30 IST Opening address by David Gross and Director’s welcome speech Zvi Bern 9:30- 10:25 IST Scattering Amplitudes as a Tool for Understanding Gravity Aninda Sinha 10:40--11:20 IST Rebooting the S-matrix bootstrap Mon, Oct 19, Session 2: Chair: Jyotirmoy Bhattacharyya Jerome Gauntlett 14:00-14:40 IST Spatially Modulated & Supersymmetric Mass Deformations of N=4 SYM Elias Kiritsis 14:55-15:35 IST Emergent gravity from hidden sectors and TT deformations Rene Meyer 15:50 -16:30 IST Strongly Correlated Dirac Materials, Electron Hydrodynamics & AdS/CFT Mon, Oct 19, Session 3: Chair: Bindusar Sahoo Chethan Krishnan 19:30-20:10 IST Cosmic Censorship of Trans-Planckian Field Ranges in Gravitational Collapse Timm Wrase 20:25 - 21:05 IST Misaligned SUSY in string theory Thomas van Riet 21:20 -22:00 IST A de Sitter landscape and Russel's teapot 1 The Dual Mysteries of Gauge Theories and Gravity Tue, Oct 20, Session 1: Chair: Nabamita Banerjee Rajesh Gopakumar 9:00 - 9:40 IST Branched Covers and Worldsheet Localisation in AdS_3 Gustavo Joaquin Turiaci 9:55- 10:35 IST The gravitational path integral near extremality Ayan Mukhopadhyay 10:50- 11:30 IST Analogue quantum black holes Tue, Oct 20, Session 2: Chair: Koushik Ray David Mateos 14:00-14:40 IST Holographic Dynamics near a Critical Point Shiraz Minwalla 14:55 - 15:35 IST Fermi seas from Bose condensates and a bosonic exclusion principle in matter Chern Simons theories. -
Holomorphic Bootstrap for Rational CFT in 2D
Holomorphic Bootstrap for Rational CFT in 2D Sunil Mukhi YITP, July 5, 2018 Based on: \On 2d Conformal Field Theories with Two Characters", Harsha Hampapura and Sunil Mukhi, JHEP 1601 (2106) 005, arXiv: 1510.04478. \Cosets of Meromorphic CFTs and Modular Differential Equations", Matthias Gaberdiel, Harsha Hampapura and Sunil Mukhi, JHEP 1604 (2016) 156, arXiv: 1602.01022. \Two-dimensional RCFT's without Kac-Moody symmetry", Harsha Hampapura and Sunil Mukhi, JHEP 1607 (2016) 138, arXiv: 1605.03314. \Universal RCFT Correlators from the Holomorphic Bootstrap", Sunil Mukhi and Girish Muralidhara, JHEP 1802 (2018) 028, arXiv: 1708.06772. and work in progress. Related work: \Hecke Relations in Rational Conformal Field Theory", Jeffrey A. Harvey and Yuxiao Wu, arXiv: 1804.06860. And older work: \Correlators of primary fields in the SU(2) WZW theory on Riemann surfaces", Samir D. Mathur, Sunil Mukhi and Ashoke Sen, Nucl. Phys. B305 (1988), 219. “Differential equations for correlators and characters in arbitrary rational conformal field theories", Samir D. Mathur, Sunil Mukhi and Ashoke Sen, Nucl. Phys. B312 (1989) 15. \On the classification of rational conformal field theories", Samir D. Mathur, Sunil Mukhi and Ashoke Sen, Phys. Lett. B213 (1988) 303. \Reconstruction of conformal field theories from modular geometry on the torus", Samir D. Mathur, Sunil Mukhi and Ashoke Sen, Nucl. Phys. B318 (1989) 483. “Differential equations for rational conformal characters", S. Naculich, Nucl. Phys. B 323 (1989) 423. Outline 1 Introduction and Motivation 2 The Wronskian determinant 3 Few-character theories 4 Monster-like theories 5 Bounds and Numerical Bootstrap 6 Hecke Relations 7 Conclusions Introduction and Motivation • The partition function of a 2D CFT is: L − c L¯ − c Z(τ; τ¯) = tr q 0 24 q¯ 0 24 where: 2πiτ 1 H q = e ;L0 = 2 2π − iP Here, H; P are the generators of translations in time and space respectively, and τ is the modular parameter of a torus. -
Year Book of the Indian National Science Academy
AL SCIEN ON C TI E Y A A N C A N D A E I M D Y N E I A R Year Book B of O The Indian National O Science Academy K 2019 2019 Volume I Angkor, Mob: 9910161199 Angkor, Fellows 2019 i The Year Book 2019 Volume–I S NAL CIEN IO CE T A A C N A N D A E I M D Y N I INDIAN NATIONAL SCIENCE ACADEMY New Delhi ii The Year Book 2019 © INDIAN NATIONAL SCIENCE ACADEMY ISSN 0073-6619 E-mail : esoffi [email protected], [email protected] Fax : +91-11-23231095, 23235648 EPABX : +91-11-23221931-23221950 (20 lines) Website : www.insaindia.res.in; www.insa.nic.in (for INSA Journals online) INSA Fellows App: Downloadable from Google Play store Vice-President (Publications/Informatics) Professor Gadadhar Misra, FNA Production Dr VK Arora Shruti Sethi Published by Professor Gadadhar Misra, Vice-President (Publications/Informatics) on behalf of Indian National Science Academy, Bahadur Shah Zafar Marg, New Delhi 110002 and printed at Angkor Publishers (P) Ltd., B-66, Sector 6, NOIDA-201301; Tel: 0120-4112238 (O); 9910161199, 9871456571 (M) Fellows 2019 iii CONTENTS Volume–I Page INTRODUCTION ....... v OBJECTIVES ....... vi CALENDAR ....... vii COUNCIL ....... ix PAST PRESIDENTS OF THE ACADEMY ....... xi RECENT PAST VICE-PRESIDENTS OF THE ACADEMY ....... xii SECRETARIAT ....... xiv THE FELLOWSHIP Fellows – 2019 ....... 1 Foreign Fellows – 2019 ....... 154 Pravasi Fellows – 2019 ....... 172 Fellows Elected (effective 1.1.2019) ....... 173 Foreign Fellows Elected (effective 1.1.2019) ....... 177 Fellowship – Sectional Committeewise ....... 178 Local Chapters and Conveners ...... -
Five Year Annual Report 2007-2012
UM-DAE CBS CENTRE FOR EXCELLENCE IN BASIC SCIENCES Health Centre Building, University of Mumbai, Kalina Campus, Mumbai -400 098 Phone: 91-22-26524983 | Fax: 91-22-26524982 FIVE YEAR REPORT (August 2007 – March 2012) UM-DAE CBS University of Mumbai (UM) – Department of Atomic Energy (DAE) Centre for Excellence in Basic Sciences (CBS) FIVE YEAR REPORT (August 2007 – March 2012) Preface The Centre for Excellence in Basic Sciences (CBS) was created in 2007 as a project of the Board of Research in Nuclear Sciences (BRNS), a wing of DAE, with the objective of sustaining a brand institution in the field of Basic Sciences on the campus of a University. The principal thrust was to impart high quality undergraduate and post graduate education in the midst of a vibrant research environment with emphasis on the experimental component within a multi-disciplinary framework. This was, indeed a novel initiative, and if successful, this would form a role model for many Universities to follow. CBS formally came into existence on March 26, 2007, with the signing of an MoU between the University of Mumbai and the Department of Atomic Energy (DAE). The Centre has ipso-facto autonomy with regard to academic, financial and administrative activities. The University made available a 5- acre plot of land on the Kalina campus, Santa Cruz (E) for the construction of permanent buildings while DAE has been providing all the necessary funds. For the first five years BRNS sanctioned Rs. 51.50 crores for the CBS project. In 2007 the Centre started the 5-year Integrated M. -
Mathematical Physics and String Theory
TIFR Annual Report 2002-03 THEORETICAL PHYSICS String Theory and Mathematical Physics Closed String Tachyon Potential Calculation The closed string 4-Tachyon amplitude in C/ZN orbifold was calculated. In an appropriate large N limit, this will throw some light on the behaviour of closed string tachyon potential in target space. [Allan Adams, Atish Dabholkar, Ashik Iqubal, Joris Raeymaekers] Compactification by Duality Twists The Scherk-Schwarz potential generated by string theory compactifications was investigated in the case of twists belonging to the duality group. For some twists, such twisted compactifications are equivalent to introducing internal fluxes. [Atish Dabholkar, Ashik Iqubal, Prasanta Tripathy, Sandip Trivedi] Duality twists, Fluxes, and Orbifolds An important problem in string theory is to generate a potential for the unwanted massless moduli fields. With this motivation, compactifications with duality twists and their relation to orbifolds and compactifications with fluxes were investigated. Inequivalent compactifications were classified by conjugacy classes of the U-duality group and resulted in gauged supergravities in lower dimensions with nontrivial potential on the moduli space. It was shown that the potential has a stable minima precisely at the fixed points of the twist group and that the theory at the minimum has an exact CFT description as an orbifold. The implications of these results for moduli stablization is under investigation. [Atish Dabholkar with Chris Hull] Tachyon Condensation in String Theory Usually F-theory duals of string theory are considered for supersymmetric backgrounds. F- theory duals of certain nonsupersymmetric backgrounds were considered that have localized tachyons. Some speculations about the endpoint of the tachyon condensation were presented based on this duality. -
Orientifolds: the Unique Personality of Each Spacetime Dimension
hep-th/9710004 TIFR/TH/97-54 Orientifolds: The Unique Personality Of Each Spacetime Dimension Sunil Mukhi1 Tata Institute of Fundamental Research, Homi Bhabha Rd, Bombay 400 005, India ABSTRACT I review some recent developments in our understanding of the dynamics of Z2 ori- entifolds of type IIA and IIB strings and M-theory. Interesting physical phenomena that occur in each spacetime dimension from 10 to 1 are summarized, along with some relation- ships to nonperturbative effects and to M- and F-theory. The conceptual aspects that are highlighted are: (i) orientifolds of M-theory, (ii) exceptional gauge symmetry from open strings, (iii) certain similarities between branes and orientifold planes. Some comments arXiv:hep-th/9710004v1 1 Oct 1997 are also made on disconnected components of orientifold moduli space. September 1997 Based on talks delivered at the Workshop on Frontiers in Field Theory, Quantum Gravity and String Theory, Puri (December 1996) and at the joint Paris-Rome-Utrecht-Heraklion-Copenhagen meeting, Ecole Normale Superieure, Paris (August 1997). 1 E-mail: [email protected] “Personality goes a long way”[1]. 1. Introduction: Orientifolds An orientifold of an oriented, closed-string theory is obtained by taking the quotient of the theory by the action of a discrete symmetry group Γ that includes orientation reversal of the string[2,3]. After taking the quotient, one has a theory of unoriented closed and open strings. In this article I will restrict my attention to cases where Γ = Z2, so the single nontrivial element is Ω · I where I is some geometric symmetry that squares to 1. -
Mathematical Physics and String Theory
TIFR Annual Report 2004-05 THEORETICAL PHYSICS String Theory and Mathematical Physics Highlights Quantum corrections are shown to convert a singular classical geometry into a black hole geometry with a smooth horizon. The entropy of the black hole matches precisely with macroscopic counting. The AdS5 big and small blackhole saddle points have been identified with those of the large N holographic gauge theory, in the phase where the eigenvalue distribution of the unitary matrix has a gap. This indicates that the phase transition at the closing of the gap is a crossover point from a blackhole description to that in terms of excited strings. The semiclassical limit of the gauge-gravity correspondence, in a specific sector of four- dimensional Yang-Mills theory preserving half the supersymmetries, has been derived. Correlation functions of bulk and boundary operators on extended D-branes of c = 1 noncritical string theory were obtained. By higher loop calculations it has been confirmed that the deconfining transition in Yang Mills theory on S3 is of first order. It has been shown that weakly coupled gauge theory undergoes a single first order phase transition from a “black string” to a “black hole” like phase. The existence of meta-stable localized bubbles of gluon plasma –“ plasma balls” – in large N confining gauge theories, undergoing first order deconfinement transitions, have been proposed. The qualitative structure of the phase diagrams of a class of large N gauge theories on circles in 1 dimension and on tori in 2 dimensions have been determined. A matrix model incorporating the full unbroken symmetry of the c = 1 string was proposed. -
The Year Book 2019
THE YEAR BOOK 2019 INDIAN ACADEMY OF SCIENCES Bengaluru Postal Address: Indian Academy of Sciences Post Box No. 8005 C.V. Raman Avenue Sadashivanagar Post, Raman Research Institute Campus Bengaluru 560 080 India Telephone : +91-80-2266 1200, +91-80-2266 1203 Fax : +91-80-2361 6094 Email : [email protected], [email protected] Website : www.ias.ac.in © 2019 Indian Academy of Sciences Information in this Year Book is updated up to 22 February 2019. Editorial & Production Team: Nalini, B.R. Thirumalai, N. Vanitha, M. Venugopal, M.S. Published by: Executive Secretary, Indian Academy of Sciences Text formatted by WINTECS Typesetters, Bengaluru (Ph. +91-80-2332 7311) Printed by Lotus Printers Pvt. Ltd., Bengaluru CONTENTS Page Section A: Indian Academy of Sciences Memorandum of Association ................................................... 2 Role of the Academy ............................................................... 4 Statutes .................................................................................. 7 Council for the period 2019–2021 ............................................ 18 Office Bearers ......................................................................... 19 Former Presidents ................................................................... 20 Activities – a profile ................................................................. 21 Academy Document on Scientific Values ................................. 25 The Academy Trust ................................................................. 33 Section B: Professorships