The De Broglie-Bohm Pilot Wave Theory Via E- Infinity Cantorian Spacetime Interpretation*)
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The Theory of (Exclusively) Local Beables
The Theory of (Exclusively) Local Beables Travis Norsen Marlboro College Marlboro, VT 05344 (Dated: June 17, 2010) Abstract It is shown how, starting with the de Broglie - Bohm pilot-wave theory, one can construct a new theory of the sort envisioned by several of QM’s founders: a Theory of Exclusively Local Beables (TELB). In particular, the usual quantum mechanical wave function (a function on a high-dimensional configuration space) is not among the beables posited by the new theory. Instead, each particle has an associated “pilot- wave” field (living in physical space). A number of additional fields (also fields on physical space) maintain what is described, in ordinary quantum theory, as “entanglement.” The theory allows some interesting new perspective on the kind of causation involved in pilot-wave theories in general. And it provides also a concrete example of an empirically viable quantum theory in whose formulation the wave function (on configuration space) does not appear – i.e., it is a theory according to which nothing corresponding to the configuration space wave function need actually exist. That is the theory’s raison d’etre and perhaps its only virtue. Its vices include the fact that it only reproduces the empirical predictions of the ordinary pilot-wave theory (equivalent, of course, to the predictions of ordinary quantum theory) for spinless non-relativistic particles, and only then for wave functions that are everywhere analytic. The goal is thus not to recommend the TELB proposed here as a replacement for ordinary pilot-wave theory (or ordinary quantum theory), but is rather to illustrate (with a crude first stab) that it might be possible to construct a plausible, empirically arXiv:0909.4553v3 [quant-ph] 17 Jun 2010 viable TELB, and to recommend this as an interesting and perhaps-fruitful program for future research. -
The Union of Quantum Field Theory and Non-Equilibrium Thermodynamics
The Union of Quantum Field Theory and Non-equilibrium Thermodynamics Thesis by Anthony Bartolotta In Partial Fulfillment of the Requirements for the degree of Doctor of Philosophy CALIFORNIA INSTITUTE OF TECHNOLOGY Pasadena, California 2018 Defended May 24, 2018 ii c 2018 Anthony Bartolotta ORCID: 0000-0003-4971-9545 All rights reserved iii Acknowledgments My time as a graduate student at Caltech has been a journey for me, both professionally and personally. This journey would not have been possible without the support of many individuals. First, I would like to thank my advisors, Sean Carroll and Mark Wise. Without their support, this thesis would not have been written. Despite entering Caltech with weaker technical skills than many of my fellow graduate students, Mark took me on as a student and gave me my first project. Mark also granted me the freedom to pursue my own interests, which proved instrumental in my decision to work on non-equilibrium thermodynamics. I am deeply grateful for being provided this priviledge and for his con- tinued input on my research direction. Sean has been an incredibly effective research advisor, despite being a newcomer to the field of non-equilibrium thermodynamics. Sean was the organizing force behind our first paper on this topic and connected me with other scientists in the broader community; at every step Sean has tried to smoothly transition me from the world of particle physics to that of non-equilibrium thermody- namics. My research would not have been nearly as fruitful without his support. I would also like to thank the other two members of my thesis and candidacy com- mittees, John Preskill and Keith Schwab. -
On the Foundations of Eurhythmic Physics: a Brief Non Technical Survey
International Journal of Philosophy 2017; 5(6): 50-53 http://www.sciencepublishinggroup.com/j/ijp doi: 10.11648/j.ijp.20170506.11 ISSN: 2330-7439 (Print); ISSN: 2330-7455 (Online) On the Foundations of Eurhythmic Physics: A Brief Non Technical Survey Paulo Castro 1, José Ramalho Croca 1, 2, Rui Moreira 1, Mário Gatta 1, 3 1Center for Philosophy of Sciences of the University of Lisbon (CFCUL), Lisbon, Portugal 2Department of Physics, University of Lisbon, Lisbon, Portugal 3Centro de Investigação Naval (CINAV), Portuguese Naval Academy, Almada, Portugal Email address: To cite this article: Paulo Castro, José Ramalho Croca, Rui Moreira, Mário Gatta. On the Foundations of Eurhythmic Physics: A Brief Non Technical Survey. International Journal of Philosophy . Vol. 5, No. 6, 2017, pp. 50-53. doi: 10.11648/j.ijp.20170506.11 Received : October 9, 2017; Accepted : November 13, 2017; Published : February 3, 2018 Abstract: Eurhythmic Physics is a new approach to describe physical systems, where the concepts of rhythm, synchronization, inter-relational influence and non-linear emergence stand out as major concepts. The theory, still under development, is based on the Principle of Eurhythmy, the assertion that all systems follow, on average, the behaviors that extend their existence, preserving and reinforcing their structural stability. The Principle of Eurhythmy implies that all systems in Nature tend to harmonize or cooperate between themselves in order to persist, giving rise to more complex structures. This paper provides a brief non-technical introduction to the subject. Keywords: Eurhythmic Physics, Principle of Eurhythmy, Non-Linearity, Emergence, Complex Systems, Cooperative Evolution among a wider range of interactions. -
Path Integral and Asset Pricing
Path Integral and Asset Pricing Zura Kakushadze§†1 § Quantigicr Solutions LLC 1127 High Ridge Road #135, Stamford, CT 06905 2 † Free University of Tbilisi, Business School & School of Physics 240, David Agmashenebeli Alley, Tbilisi, 0159, Georgia (October 6, 2014; revised: February 20, 2015) Abstract We give a pragmatic/pedagogical discussion of using Euclidean path in- tegral in asset pricing. We then illustrate the path integral approach on short-rate models. By understanding the change of path integral measure in the Vasicek/Hull-White model, we can apply the same techniques to “less- tractable” models such as the Black-Karasinski model. We give explicit for- mulas for computing the bond pricing function in such models in the analog of quantum mechanical “semiclassical” approximation. We also outline how to apply perturbative quantum mechanical techniques beyond the “semiclas- sical” approximation, which are facilitated by Feynman diagrams. arXiv:1410.1611v4 [q-fin.MF] 10 Aug 2016 1 Zura Kakushadze, Ph.D., is the President of Quantigicr Solutions LLC, and a Full Professor at Free University of Tbilisi. Email: [email protected] 2 DISCLAIMER: This address is used by the corresponding author for no purpose other than to indicate his professional affiliation as is customary in publications. In particular, the contents of this paper are not intended as an investment, legal, tax or any other such advice, and in no way represent views of Quantigic Solutions LLC, the website www.quantigic.com or any of their other affiliates. 1 Introduction In his seminal paper on path integral formulation of quantum mechanics, Feynman (1948) humbly states: “The formulation is mathematically equivalent to the more usual formulations. -
Critical Notice: the Quantum Revolution in Philosophy (Richard Healey; Oxford University Press, 2017)
Critical notice: The Quantum Revolution in Philosophy (Richard Healey; Oxford University Press, 2017) DAVID WALLACE Richard Healey’s The Quantum Revolution in Philosophy is a terrific book, and yet I disagree with nearly all its main substantive conclusions. The purpose of this review is to say why the book is well worth your time if you have any interest in the interpretation of quantum theory or in the general philosophy of science, and yet why in the end I think Healey’s ambitious project fails to achieve its full goals. The quantum measurement problem is the central problem in philosophy of quantum mechanics, and arguably the most important issue in philosophy of physics more generally; not coincidentally, it has seen some of the field’s best work, and some of its most effective engagement with physics. Yet the debate in the field largely now appears deadlocked: the last few years have seen developments in our understanding of many of the proposed solutions, but not much movement in the overall dialectic. This is perhaps clearest with a little distance: metaphysicians who need to refer to quantum mechanics increasingly tend to talk of “the three main interpretations” (they mean: de Broglie and Bohm’s hidden variable theory; Ghirardi, Rimini and Weber’s (‘GRW’) dynamical-collapse theory; Everett’s many- universes theory) and couch their discussions so as to be, as much as possible, equally valid for any of those three. It is not infrequent for philosophers of physics to use the familiar framework of underdetermination of theory by evidence to discuss the measurement problem. -
Pilot-Wave Hydrodynamics
FL47CH12-Bush ARI 1 December 2014 20:26 Pilot-Wave Hydrodynamics John W.M. Bush Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139; email: [email protected] Annu. Rev. Fluid Mech. 2015. 47:269–92 Keywords First published online as a Review in Advance on walking drops, Faraday waves, quantum analogs September 10, 2014 The Annual Review of Fluid Mechanics is online at Abstract fluid.annualreviews.org Yves Couder, Emmanuel Fort, and coworkers recently discovered that a This article’s doi: millimetric droplet sustained on the surface of a vibrating fluid bath may 10.1146/annurev-fluid-010814-014506 self-propel through a resonant interaction with its own wave field. This ar- Copyright c 2015 by Annual Reviews. ticle reviews experimental evidence indicating that the walking droplets ex- All rights reserved hibit certain features previously thought to be exclusive to the microscopic, Annu. Rev. Fluid Mech. 2015.47:269-292. Downloaded from www.annualreviews.org quantum realm. It then reviews theoretical descriptions of this hydrody- namic pilot-wave system that yield insight into the origins of its quantum- Access provided by Massachusetts Institute of Technology (MIT) on 01/07/15. For personal use only. like behavior. Quantization arises from the dynamic constraint imposed on the droplet by its pilot-wave field, and multimodal statistics appear to be a feature of chaotic pilot-wave dynamics. I attempt to assess the po- tential and limitations of this hydrodynamic system as a quantum analog. This fluid system is compared to quantum pilot-wave theories, shown to be markedly different from Bohmian mechanics and more closely related to de Broglie’s original conception of quantum dynamics, his double-solution theory, and its relatively recent extensions through researchers in stochastic electrodynamics. -
Pilot-Wave Theory, Bohmian Metaphysics, and the Foundations of Quantum Mechanics Lecture 8 Bohmian Metaphysics: the Implicate Order and Other Arcana
Pilot-wave theory, Bohmian metaphysics, and the foundations of quantum mechanics Lecture 8 Bohmian metaphysics: the implicate order and other arcana Mike Towler TCM Group, Cavendish Laboratory, University of Cambridge www.tcm.phy.cam.ac.uk/∼mdt26 and www.vallico.net/tti/tti.html [email protected] – Typeset by FoilTEX – 1 Acknowledgements The material in this lecture is largely derived from books and articles by David Bohm, Basil Hiley, Paavo Pylkk¨annen, F. David Peat, Marcello Guarini, Jack Sarfatti, Lee Nichol, Andrew Whitaker, and Constantine Pagonis. The text of an interview between Simeon Alev and Peat is extensively quoted. Other sources used and many other interesting papers are listed on the course web page: www.tcm.phy.cam.ac.uk/∼mdt26/pilot waves.html MDT – Typeset by FoilTEX – 2 More philosophical preliminaries Positivism: Observed phenomena are all that require discussion or scientific analysis; consideration of other questions, such as what the underlying mechanism may be, or what ‘real entities’ produce the phenomena, is dismissed as meaningless. Truth begins in sense experience, but does not end there. Positivism fails to prove that there are not abstract ideas, laws, and principles, beyond particular observable facts and relationships and necessary principles, or that we cannot know them. Nor does it prove that material and corporeal things constitute the whole order of existing beings, and that our knowledge is limited to them. Positivism ignores all humanly significant and interesting problems, citing its refusal to engage in reflection; it gives to a particular methodology an absolutist status and can do this only because it has partly forgotten, partly repressed its knowledge of the roots of this methodology in human concerns. -
Hamiltonian Formulation of the Pilot-Wave Theory Has Also Been Developed by Holland [9]
Hamiltonian Formulation of the Pilot-Wave Theory Dan N. Vollick Irving K. Barber School of Arts and Sciences University of British Columbia Okanagan 3333 University Way Kelowna, B.C. Canada V1V 1V7 Abstract In the pilot-wave theory of quantum mechanics particles have definite positions and velocities and the system evolves deterministically. The velocity of a particle is deter- mined by the wave function of the system (the guidance equation) and the wave function evolves according to Schrodinger’s equation. In this paper I first construct a Hamiltonian that gives Schrodinger’s equation and the guidance equation for the particle. I then find the Hamiltonian for a relativistic particle in Dirac’s theory and for a quantum scalar field. arXiv:2101.10117v1 [quant-ph] 21 Jan 2021 1 1 Introduction In the standard approach to quantum mechanics the wave function provides a complete description of any system and is used to calculate probability distributions for observ- ables associated with the system. In the pilot-wave theory pioneered by de Broglie [1, 2] in the 1920’s, particles have definite positions and velocities and are “guided” by the wave function, which satisfies Schrodinger’s equation. A similar approach was developed by Bohm [3, 4] in the early 1950’s (see [5] and [6] for extensive reviews). For a single particle in the non-relativistic theory the velocity of the particle is given by dX~ = J~(X,~ t) , (1) dt where X~ is the particle’s position and h¯ J~ = ψ∗ ~ ψ ψ ~ ψ∗ . (2) 2im ψ 2 ∇ − ∇ | | h i Particle trajectories are, therefore, integral curves to the vector field J~. -
Hydrodynamic Quantum Field Theory: the Free Particle
Comptes Rendus Mécanique Yuval Dagan and John W. M. Bush Hydrodynamic quantum field theory: the free particle Volume 348, issue 6-7 (2020), p. 555-571. <https://doi.org/10.5802/crmeca.34> Part of the Thematic Issue: Tribute to an exemplary man: Yves Couder Guest editors: Martine Ben Amar (Paris Sciences & Lettres, LPENS, Paris, France), Laurent Limat (Paris-Diderot University, CNRS, MSC, Paris, France), Olivier Pouliquen (Aix-Marseille Université, CNRS, IUSTI, Marseille, France) and Emmanuel Villermaux (Aix-Marseille Université, CNRS, Centrale Marseille, IRPHE, Marseille, France) © Académie des sciences, Paris and the authors, 2020. Some rights reserved. This article is licensed under the Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/ Les Comptes Rendus. Mécanique sont membres du Centre Mersenne pour l’édition scientifique ouverte www.centre-mersenne.org Comptes Rendus Mécanique 2020, 348, nO 6-7, p. 555-571 https://doi.org/10.5802/crmeca.34 Tribute to an exemplary man: Yves Couder Bouncing drops, memory / Bouncing drops, memory Hydrodynamic quantum field theory: the free particle a b,* Yuval Dagan and John W. M. Bush a Faculty of Aerospace Engineering, Technion - Israel Institute of Technology, Haifa, Israel b Department of Mathematics, Massachusetts Institute of Technology, Cambridge, MA, USA E-mails: [email protected] (Y. Dagan), [email protected] (J. W. M. Bush) Abstract. We revisit de Broglie’s double-solution pilot-wave theory in light of insights gained from the hy- drodynamic pilot-wave system discovered by Couder and Fort [1]. de Broglie proposed that quantum parti- cles are characterized by an internal oscillation at the Compton frequency, at which rest mass energy is ex- changed with field energy. -
Pilot-Wave Theory, Bohmian Metaphysics, and the Foundations of Quantum Mechanics Lecture 6 Calculating Things with Quantum Trajectories
Pilot-wave theory, Bohmian metaphysics, and the foundations of quantum mechanics Lecture 6 Calculating things with quantum trajectories Mike Towler TCM Group, Cavendish Laboratory, University of Cambridge www.tcm.phy.cam.ac.uk/∼mdt26 and www.vallico.net/tti/tti.html [email protected] – Typeset by FoilTEX – 1 Acknowledgements The material in this lecture is to a large extent a summary of publications by Peter Holland, R.E. Wyatt, D.A. Deckert, R. Tumulka, D.J. Tannor, D. Bohm, B.J. Hiley, I.P. Christov and J.D. Watson. Other sources used and many other interesting papers are listed on the course web page: www.tcm.phy.cam.ac.uk/∼mdt26/pilot waves.html MDT – Typeset by FoilTEX – 2 On anticlimaxes.. Up to now we have enjoyed ourselves freewheeling through the highs and lows of fundamental quantum and relativistic physics whilst slagging off Bohr, Heisenberg, Pauli, Wheeler, Oppenheimer, Born, Feynman and other physics heroes (last week we even disagreed with Einstein - an attitude that since the dawn of the 20th century has been the ultimate sign of gibbering insanity). All tremendous fun. This week - we shall learn about finite differencing and least squares fitting..! Cough. “Dr. Towler, please. You’re not allowed to use the sprinkler system to keep the audience awake.” – Typeset by FoilTEX – 3 QM computations with trajectories Computing the wavefunction from trajectories: particle and wave pictures in quantum mechanics and their relation P. Holland (2004) “The notion that the concept of a continuous material orbit is incompatible with a full wave theory of microphysical systems was central to the genesis of wave mechanics. -
The Path Integral Approach to Quantum Mechanics Lecture Notes for Quantum Mechanics IV
The Path Integral approach to Quantum Mechanics Lecture Notes for Quantum Mechanics IV Riccardo Rattazzi May 25, 2009 2 Contents 1 The path integral formalism 5 1.1 Introducingthepathintegrals. 5 1.1.1 Thedoubleslitexperiment . 5 1.1.2 An intuitive approach to the path integral formalism . .. 6 1.1.3 Thepathintegralformulation. 8 1.1.4 From the Schr¨oedinger approach to the path integral . .. 12 1.2 Thepropertiesofthepathintegrals . 14 1.2.1 Pathintegralsandstateevolution . 14 1.2.2 The path integral computation for a free particle . 17 1.3 Pathintegralsasdeterminants . 19 1.3.1 Gaussianintegrals . 19 1.3.2 GaussianPathIntegrals . 20 1.3.3 O(ℏ) corrections to Gaussian approximation . 22 1.3.4 Quadratic lagrangians and the harmonic oscillator . .. 23 1.4 Operatormatrixelements . 27 1.4.1 Thetime-orderedproductofoperators . 27 2 Functional and Euclidean methods 31 2.1 Functionalmethod .......................... 31 2.2 EuclideanPathIntegral . 32 2.2.1 Statisticalmechanics. 34 2.3 Perturbationtheory . .. .. .. .. .. .. .. .. .. .. 35 2.3.1 Euclidean n-pointcorrelators . 35 2.3.2 Thermal n-pointcorrelators. 36 2.3.3 Euclidean correlators by functional derivatives . ... 38 0 0 2.3.4 Computing KE[J] and Z [J] ................ 39 2.3.5 Free n-pointcorrelators . 41 2.3.6 The anharmonic oscillator and Feynman diagrams . 43 3 The semiclassical approximation 49 3.1 Thesemiclassicalpropagator . 50 3.1.1 VanVleck-Pauli-Morette formula . 54 3.1.2 MathematicalAppendix1 . 56 3.1.3 MathematicalAppendix2 . 56 3.2 Thefixedenergypropagator. 57 3.2.1 General properties of the fixed energy propagator . 57 3.2.2 Semiclassical computation of K(E)............. 61 3.2.3 Two applications: reflection and tunneling through a barrier 64 3 4 CONTENTS 3.2.4 On the phase of the prefactor of K(xf ,tf ; xi,ti) .... -
Quantum Fluctuation
F EATURE Kavli IPMU Principal Investigator Eiichiro Komatsu Research Area: Theoretical Physics Quantum Fluctuation The 20th century has seen the remarkable is not well known to the public. This ingredient development of the Standard Model of elementary is not contained in the name of ΛCDM, but is particles and elds. The last piece, the Higgs particle, an indispensable part of the Standard Model of was discovered in 2012. In the 21st century, we are cosmology. It is the idea that our ultimate origin is witnessing the similarly remarkable development the quantum mechanical uctuation generated in of the Standard Model of cosmology. In his 2008 the early Universe. However remarkable it may sound, book on“ Cosmology” Steven Weinberg, who led this idea is consistent with all the observational data the development of particle physics, wrote“: This that have been collected so far for the Universe. new excitement in cosmology came as if on cue Furthermore, the evidence supporting this idea keeps for elementary particle physicists. By the 1980s the accumulating and is strengthened as we collect more Standard Model of elementary particles and elds data! It is likely that all the structures we see today in had become well established. Although signicant the Universe, such as galaxies, stars, planets, and lives, theoretical and experimental work continued, there ultimately originated from the quantum uctuation was now little contact between experiment and new in the early Universe. theoretical ideas, and without this contact, particle physics lost much of its liveliness. Cosmology now Borrowing energy from the vacuum offered the excitement that particle physicists had experienced in the 1960s and 1970s.” In quantum mechanics, we can borrow energy The Standard Model of cosmology is known from the vacuum if we promise to return it as the“ ΛCDM model”.