Results for 'Virtual particles'

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  1.  62
    Do Virtual Particles Exist?Robert Weingard - 1982 - PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association 1982:235 - 242.
    In this paper a few facts about Feynman diagrams and the perturbation expansion of the S-matrix are reviewed and discussed in connection with the question of the ontological status of virtual particles.
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  2.  69
    Haunted by the Spectre of Virtual Particles: A Philosophical Reconsideration.Tobias Fox - 2008 - Journal for General Philosophy of Science / Zeitschrift für Allgemeine Wissenschaftstheorie 39 (1):35-51.
    A virtual particle is an elementary particle in a quantum field theory that serves to symbolise the interaction of its counterparts, the so called real particles. In the last 20 years, philosophers of physics have put forth several arguments for and against an interpretation of virtual particles as being like ordinary objects in space and time. In this article, I will attempt to systematise the major arguments and argue that no pro-argument is ultimately satisfactory, and that (...)
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  3.  22
    Particle Description of Zero-Energy Vacuum I: Virtual Particles[REVIEW]Jean-Yves Grandpeix & François Lurçat - 2002 - Foundations of Physics 32 (1):109-131.
    First the “frame problem” is sketched: The motion of an isolated particle obeys a simple law in Galilean frames, but how does the Galilean character of the frame manifest itself at the place of the particle? A description of vacuum as a system of virtual particles will help to answer this question. For future application to such a description, the notion of global particle is defined and studied. To this end, a systematic use of the Fourier transformation on (...)
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  4.  54
    On Virtual Phonons, Photons, and Electrons.Günter Nimtz - 2009 - Foundations of Physics 39 (12):1346-1355.
    A macroscopic realization of the peculiar virtual particles is presented. The classical Helmholtz and the Schrödinger equations are differential equations of the same mathematical structure. The solutions with an imaginary wave number are called evanescent modes in the case of elastic and electromagnetic fields. In the case of non-relativistic quantum mechanical fields they are called tunneling solutions. The imaginary wave numbers point to strange consequences: The waves are non-local, they are not observable, and they are described as (...) particles. During the last two decades QED calculations of the solutions with an imaginary wave number have been experimentally confirmed for phonons, photons, and electrons. The experimental proofs of the predictions of non-relativistic quantum mechanics and the Wigner phase time approach for the elastic, electromagnetic and Schrödinger fields will be presented in this article. The results are zero time in the barrier and an interaction time (i.e. a phase shift) at the barrier interfaces. The measured tunneling time scales approximately inversely with the particle energy. Actually, the tunneling time is given only by the barrier boundary interaction time, as zero time is spent inside a barrier. (shrink)
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  5.  87
    How do “virtual” photons and mesons transmit forces between charged particles and nucleons?C. W. Rietdijk - 1977 - Foundations of Physics 7 (5-6):351-374.
    Examining the process of action at a distance, we arrive at the following conclusions: (a) The virtual photons and mesons transmitting Coulomb and nuclear forces, respectively, do not arise from “temporary violations of energy conservation,” but, on the contrary, exactly embody the potential energy corresponding to the relevant forceF that they transmit on their collision with the charged particles or nucleons via the formula Δp=FΔt. (b) In the case of an attractive force, the energy of these photons and (...)
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  6.  31
    Photon wave-particle duality and virtual electromagnetic waves.C. Meis - 1997 - Foundations of Physics 27 (6):865-873.
    The question of the relation between the amplitude of the photon vector potential and its angular frequency is analyzed. The analogy between the relativistic quantum mechanical equations for a massles particle and those governing the photon vector potential appears clearly. Finally, the virtual electromagnetic waves associated with the photon and predicted by de Broglie, Bohr, and other appear naturally as a result of the photon vector potential quantification.
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  7.  12
    Preface: Virtual Entities in Science.Robert Harlander, Jean-Philippe Martinez, Friedrich Steinle & Adrian Wüthrich - 2024 - Perspectives on Science 32 (3):263-268.
    In lieu of an abstract, here is a brief excerpt of the content:Preface: Virtual Entities in ScienceRobert Harlander, Jean-Philippe Martinez, Friedrich Steinle, and Adrian WüthrichIt is not only since the sudden increase of online communication due to the COVID-19 situation that the concept of the “virtual” has made its way into everyday language. In this context, it mostly denotes a digital substitute for a real object or process. Virtual reality is perhaps the best-known term in this respect. (...)
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  8.  32
    Virtuality in Modern Physics in the 1920s and 1930s: Meaning(s) of an Emerging Notion.Jean-Philippe Martinez - 2024 - Perspectives on Science 32 (3):350-371.
    This article discusses the meaning of the notion of virtuality in modern physics. To this end, it develops considerations on the introduction and establishment in nuclear physics of two independent concepts at the turn of the 1920s and 1930s: that of the virtual state, used in the context of neutron scattering studies, and that of the virtual transition, useful for the theoretical understanding of strong nuclear forces, which forms the basis of what are now called virtual (...). Their comparative analysis highlights the theoretical nature of virtual entities and processes in modern physics. It also shows how the virtual has been associated with various purely physical attributes, leading to a form of polysemy of the term, from the beginning of the application of these concepts. (shrink)
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  9. Time-energy uncertainty does not create particles.Bryan W. Roberts & Jeremy Butterfield - 2020 - Journal of Physics 1638:012005.
    In this contribution in honour of Paul Busch, we criticise the claims of many expositions that the time-energy uncertainty principle allows both a violation of energy conservation and particle creation, provided that this happens for a sufficiently short time. But we agree that there are grains of truth in these claims: which we make precise and justify using perturbation theory.
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  10.  77
    Theories of Variable Mass Particles and Low Energy Nuclear Phenomena.Mark Davidson - 2014 - Foundations of Physics 44 (2):144-174.
    Variable particle masses have sometimes been invoked to explain observed anomalies in low energy nuclear reactions (LENR). Such behavior has never been observed directly, and is not considered possible in theoretical nuclear physics. Nevertheless, there are covariant off-mass-shell theories of relativistic particle dynamics, based on works by Fock, Stueckelberg, Feynman, Greenberger, Horwitz, and others. We review some of these and we also consider virtual particles that arise in conventional Feynman diagrams in relativistic field theories. Effective Lagrangian models incorporating (...)
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  11.  26
    Particle Description of Zero-Energy Vacuum II: Basic Vacuum Systems. [REVIEW]Jean-Yves Grandpeix & François Lurçat - 2002 - Foundations of Physics 32 (1):133-158.
    We describe vacuum as a system of virtual particles, some of which have negative energies. Any system of vacuum particles is a part of a keneme, i.e., of a system of n particles which can, without violating the conservation laws, annihilate in the strict sense of the word (transform into nothing). A keneme is a homogeneous system, i.e., its state is invariant by all transformations of the invariance group. But a homogeneous system is not necessarily a (...)
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  12.  8
    How to Study Virtual Entities Historically? A Proposal.Markus Ehberger - 2024 - Perspectives on Science 32 (3):278-299.
    This paper will not present a case study of the historical development of a virtual entity. Rather, I will develop an outlook on virtual entities in the sciences and propose a corresponding method for studying them (historically). In essence, my presentation can be considered a synthesis of different observations from the history and philosophy of science and has its roots in my dissertational research on the development of the virtual particle. Starting with a reflection on the role (...)
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  13.  20
    Individual Particle Localization per Relativistic de Broglie–Bohm.David L. Bartley - 2018 - Foundations of Physics 48 (12):1731-1752.
    The significance of the de Broglie/Bohm hidden-particle position in the relativistic regime is addressed, seeking connection to the single-particle Newton–Wigner position. The effect of non-positive excursions of the ensemble density for extreme cases of positive-energy waves is easily computed using an integral of the equations of motion developed here for free spin-0 particles in 1 + 1 dimensions and is interpreted in terms of virtual-like pair creation and annihilation beneath the Compton wavelength. A Bohm-theoretic description of the acausal (...)
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  14.  16
    Quantum Particle Swarm Optimization Extraction Algorithm Based on Quantum Chaos Encryption.Chao Li, Mengna Shi, Yanqi Zhou & Erfu Wang - 2021 - Complexity 2021:1-21.
    Considering the highly complex structure of quantum chaos and the nonstationary characteristics of speech signals, this paper proposes a quantum chaotic encryption and quantum particle swarm extraction method based on an underdetermined model. The proposed method first uses quantum chaos to encrypt the speech signal and then uses the local mean decomposition method to construct a virtual receiving array and convert the underdetermined model to a positive definite model. Finally, the signal is extracted using the Levi flight strategy based (...)
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  15.  45
    Virtual Black Holes and Space–Time Structure.Gerard ’T. Hooft - 2018 - Foundations of Physics 48 (10):1134-1149.
    In the standard formalism of quantum gravity, black holes appear to form statistical distributions of quantum states. Now, however, we can present a theory that yields pure quantum states. It shows how particles entering a black hole can generate firewalls, which however can be removed, replacing them by the ‘footprints’ they produce in the out-going particles. This procedure can preserve the quantum information stored inside and around the black hole. We then focus on a subtle but unavoidable modification (...)
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  16. Triple-Aspect Monism and the Ontology of Quantum Particles.Gilbert B. Côté - 2013 - Open Journal of Philosophy 3 (4):451.
    An analysis of the physical implications of abstractness reveals the reality of three interconnected modes of existence: abstract, virtual and concrete, corresponding in physics to information, energy and matter. This triple-aspect monism clarifies the ontological status of subatomic quantum particles. It also provides a non-spooky solution to the weirdness of quantum physics and a new outlook for the mind-body problem. The ontological implications are profound for both physics and philosophy.
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  17.  29
    Missing experimental challenges to the Standard Model of particle physics.Slobodan Perovic - 2011 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 42 (1):32-42.
    The success of particle detection in high energy physics colliders critically depends on the criteria for selecting a small number of interactions from an overwhelming number that occur in the detector. It also depends on the selection of the exact data to be analyzed and the techniques of analysis. The introduction of automation into the detection process has traded the direct involvement of the physicist at each stage of selection and analysis for the efficient handling of vast amounts of data. (...)
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  18. Is the Universe a Vast, Consciousness-created Virtual Reality Simulation?Bernard Haisch - 2014 - Cosmos and History 10 (1):48-60.
    Two luminaries of 20th century astrophysics were Sir James Jeans and Sir Arthur Eddington. Both took seriously the view that there is more to reality than the physical universe and more to consciousness than simply brain activity. In his Science and the Unseen World Eddington speculated about a spiritual world and that "conscious is not wholly, nor even primarily a device for receiving sense impressions." Jeans also speculated on the existence of a universal mind and a non-mechanical reality, writing in (...)
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  19.  28
    Living and Nonliving Occasionalism.Simon Weir - 2020 - Open Philosophy 3 (1):147-160.
    Graham Harman’s Object-Oriented Ontology has employed a variant of occasionalist causation since 2002, with sensual objects acting as the mediators of causation between real objects. While the mechanism for living beings creating sensual objects is clear, how nonliving objects generate sensual objects is not. This essay sets out an interpretation of occasionalism where the mediating agency of nonliving contact is the virtual particles of nominally empty space. Since living, conscious, real objects need to hold sensual objects as sub-components, (...)
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  20.  29
    The Transition from Quantum Field Theory to One-Particle Quantum Mechanics and a Proposed Interpretation of Aharonov–Bohm Effect.Benliang Li, Daniel W. Hewak & Qi Jie Wang - 2018 - Foundations of Physics 48 (7):837-852.
    In this article, we demonstrate a sense in which the one-particle quantum mechanics and the classical electromagnetic four-potential arise from the quantum field theory. In addition, the classical Maxwell equations are derived from the QFT scattering process, while both classical electromagnetic fields and potentials serve as mathematical tools to approximate the interactions among elementary particles described by QFT physics. Furthermore, a plausible interpretation of the Aharonov–Bohm effect is raised within the QFT framework. We provide a quantum treatment of the (...)
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  21.  35
    Hydrodynamics of the Physical Vacuum: I. Scalar Quantum Sector.Valeriy I. Sbitnev - 2016 - Foundations of Physics 46 (5):606-619.
    Physical vacuum is a special superfluid medium. Its motion is described by the Navier–Stokes equation having two slightly modified terms that relate to internal forces. They are the pressure gradient and the dissipation force because of viscosity. The modifications are as follows: the pressure gradient contains an added term describing the pressure multiplied by the entropy gradient; time-averaged viscosity is zero, but its variance is not zero. Owing to these modifications, the Navier–Stokes equation can be reduced to the Schrödinger equation (...)
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  22.  27
    Hydrodynamics of the Physical Vacuum: II. Vorticity Dynamics.Valeriy I. Sbitnev - 2016 - Foundations of Physics 46 (10):1238-1252.
    Physical vacuum is a special superfluid medium populated by enormous amount of virtual particle-antiparticle pairs. Its motion is described by the modified Navier–Stokes equation: the pressure gradient divided by the mass density is replaced by the gradient from the quantum potential; time-averaged the viscosity vanishes, but its variance is not zero. Vortex structures arising in this medium show infinitely long lifetime owing to zero average viscosity. The nonzero variance is conditioned by exchanging the vortex energy with zero-point vacuum fluctuations. (...)
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  23. A Classical and Quantum Relativistic Interacting Variable-Mass Model.D. C. Salisbury - 1998 - Foundations of Physics 28 (9):1433-1442.
    A classical and quantum relativistic interacting particle formalism is revisited. A Hilbert space is achieved through the use of variable individual particle rest masses, but no c-number mass parameter is required for the relativistic free particle. Boosted center of momentum states feature in both the free and interacting model. The implications of a failure to impose simultaneity conditions at the classical level are explored. The implementation of these conditions at the quantum level leads to a finite uncertainty in interaction times, (...)
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  24.  4
    A Classical and Quantum Relativistic Interacting Variable-Mass Model.D. C. Salisbury - 1998 - Foundations of Physics 28 (9):1433-1442.
    A classical and quantum relativistic interacting particle formalism is revisited. A Hilbert space is achieved through the use of variable individual particle rest masses, but no c-number mass parameter is required for the relativistic free particle. Boosted center of momentum states feature in both the free and interacting model. The implications of a failure to impose simultaneity conditions at the classical level are explored. The implementation of these conditions at the quantum level leads to a finite uncertainty in interaction times, (...)
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  25.  47
    Chaosmologies: Quantum Field Theory, Chaos and Thought in Deleuze and Guattari's What is Philosophy?Arkady Plotnitsky - 2006 - Paragraph 29 (2):40-56.
    This article explores the relationships between the philosophical foundations of quantum field theory, the currently dominant form of quantum physics, and Deleuze's concept of the virtual, most especially in relation to the idea of chaos found in Deleuze and Guattari's What is Philosophy?. Deleuze and Guattari appear to derive this idea partly from the philosophical conceptuality of quantum field theory, in particular the concept of virtual particle formation. The article then goes on to discuss, from this perspective, the (...)
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  26.  31
    Comments on the Papers of Cushing and Redhead: "Models, High-Energy Theoretical Physics and Realism" and "Quantum Field Theory for Philosophers".Paul Teller - 1982 - PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association 1982:100 - 111.
    In response to Cushing it is urged that the vicissitudes of quantum field theory do not press towards a nonrealist attitude towards the theory as strongly as he suggests. A variety of issues which Redhead raises are taken up, including photon localizability, the wave-particle distinction in the classical limit, and the interpretation of quantum statistics, vacuum fluctuations, virtual particles, and creation and annihilation operators. It is urged that quantum field theory harbors an unacknowledged inconsistency connected with the fact (...)
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  27. O podstawowym - i niepodstawowych sposobach istnienia.Władysław Krajewski - 2002 - Filozofia Nauki 1.
    There is one fundamental and many non-fundamental kinds of existence. Things (material bodies) exist fundamentally. Many other objects exist non-fundamentally: properties, events, relations, states; abstracts (universals), laws of Nature; possible states, virtual particles; minds, mental processes; ideal objects created by minds (Popperian "World 3"). All of them are always based on material bodies, but they exist really.
     
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  28. Czy cząstki wirtualne istnieją niezależnie od kwantowej teorii pola?Krzysztof Iwan - 1994 - Filozofia Nauki 3.
    In the paper it is shown that for the existence of the virtual particles - in Quine's sense of existence - is responsible a part H'(t) of the hamiltonian of the mutual interaction among real particles. The author tries to prove that the application of Quine's definition of existence to the justification of the existence of virtual particles, cannot be accepted by the physicists. For that reason they seek another justification for the existence of (...) particles - with the help of the specific (strictly: false) interpretation of the Heisenberg time-energy uncertainity principle. (shrink)
     
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  29.  18
    Quaternion Algebra on 4D Superfluid Quantum Space-Time. Dirac’s Ghost Fermion Fields.Valeriy I. Sbitnev - 2022 - Foundations of Physics 52 (1):1-21.
    Ghost Dirac’s fermions are a manifestation of virtual particles. One fermion is the particle whose companion is the antiparticle. An ensemble of these fermions coupled in pairs represents the Bose-Einstein condensate. This condensate forms the superfluid ether. Due to the Meissner effect inherent in a superfluid medium, the paired fermions are inaccessible for instrument observation. For that reason, the ghost particles can pose the dark matter that, together with the dark energy, can be the fundamental basis of (...)
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  30.  55
    Tunneling Confronts Special Relativity.Günter Nimtz - 2011 - Foundations of Physics 41 (7):1193-1199.
    Experiments with evanescent modes and tunneling particles have shown that (i) their signal velocity may be faster than light, (ii) they are described by virtual particles, (iii) they are nonlocal and act at a distance, (iv) experimental tunneling data of phonons, photons, and electrons display a universal scattering time at the tunneling barrier front, and (v) the properties of evanescent, i.e. tunneling modes are not compatible with the special theory of relativity.
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  31. Philosophie der Teilchenphysik.Gregor Schiemann - 2017 - BUW Output 17:12-17.
    Die Deutsche Forschungsgemeinschaft (DFG) hat ab 2016 eine neue Forschergruppe unter Leitung der Bergischen Universität Wuppertal eingerichtet. Sie untersucht die Forschungen an der „größten Forschungsmaschine der Welt“, dem Large Hadron Collider (LHC) am Europäischen Zentrum für Teilchenphysik CERN in Genf, aus philosophischer, historischer und soziologischer Sicht. Wissenschaftsphilosophisch sind diese Forschungen vor allem aus drei Gründen relevant: Die Philosophie interessiert sich für den Ursprung und die grundlegenden Strukturen der Welt, für die Bedingungen des Erkenntniserfolges der Elementarteilchenphysik und nicht zuletzt für die (...)
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  32.  32
    Black Hole Unitarity and Antipodal Entanglement.Gerard ’T. Hooft - 2016 - Foundations of Physics 46 (9):1185-1198.
    Hawking particles emitted by a black hole are usually found to have thermal spectra, if not exactly, then by a very good approximation. Here, we argue differently. It was discovered that spherical partial waves of in-going and out-going matter can be described by unitary evolution operators independently, which allows for studies of space-time properties that were not possible before. Unitarity dictates space-time, as seen by a distant observer, to be topologically non-trivial. Consequently, Hawking particles are only locally thermal, (...)
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  33.  59
    Hindu Perspectives on the Thirst for Transcendence.Varadaraja V. Raman - 2003 - Zygon 38 (4):821-837.
    Definitions of nature and transcendence are given, and the framework of Hindu thought is presented. The levels of reality as discovered by physics are then discussed, which leads us to revise our notions of reality and objectivity. Transcendence is defined as something beyond matter‐energy in space‐time and is explored in several contexts of modern science, as in pre‐Big‐Bang state, negative entropy, information, complexity, and others. Finally, a philosophical reflection on consciousness is presented.
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  34.  10
    Philosophy of Logic.Willard Van Orman Quine - 1970 - Englewood Cliffs, NJ, USA: Prentice-Hall.
    1 Meaning and Truth Objection to propositions Propositions as information Diffuseness of empirical meaning Propositions dismissed Truth and semantic ascent Tokens and eternal sentences 2 Grammar Grammar by recursion Categories Immanence and transcendence Grammarian's goal reexamined Logical grammar Redundant devices Names and functors Lexicon, particle, and name Criterion of lexicon Time, events, adverbs Attitudes and modality 3 Truth Truth and satisfaction Satisfaction by sequences Tarski's definition of truth Paradox in the object language Resolution in set theory 4 Logical Truth In (...)
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  35. Some Puzzles and Unresolved Issues About Quantum Entanglement.John Earman - 2015 - Erkenntnis 80 (2):303-337.
    Schrödinger averred that entanglement is the characteristic trait of quantum mechanics. The first part of this paper is simultaneously an exploration of Schrödinger’s claim and an investigation into the distinction between mere entanglement and genuine quantum entanglement. The typical discussion of these matters in the philosophical literature neglects the structure of the algebra of observables, implicitly assuming a tensor product structure of the simple Type I factor algebras used in ordinary Quantum Mechanics . This limitation is overcome by adopting the (...)
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  36. Towards a Realistic Interpretation of Quantum Mechanics Providing a Model of the Physical World.Emilio Santos - 2015 - Foundations of Science 20 (4):357-386.
    It is argued that a realistic interpretation of quantum mechanics is possible and useful. Current interpretations, from “Copenhagen” to “many worlds” are critically revisited. The difficulties for intuitive models of quantum physics are pointed out and possible solutions proposed. In particular the existence of discrete states, the quantum jumps, the alleged lack of objective properties, measurement theory, the probabilistic character of quantum physics, the wave–particle duality and the Bell inequalities are analyzed. The sketch of a realistic picture of the quantum (...)
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  37. On Testing the Simulation Theory.Tom Campbell, Houman Owhadi, Joe Savageau & David Watkinson - manuscript
    Can the theory that reality is a simulation be tested? We investigate this question based on the assumption that if the system performing the simulation is nite (i.e. has limited resources), then to achieve low computational complexity, such a system would, as in a video game, render content (reality) only at the moment that information becomes available for observation by a player and not at the moment of detection by a machine (that would be part of the simulation and whose (...)
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  38.  15
    Local Description of the Aharonov–Bohm Effect with a Quantum Electromagnetic Field.Pablo L. Saldanha - 2021 - Foundations of Physics 51 (1):1-11.
    In the seminal works from Santos and Gozalo and Marletto and Vedral, it is shown how the Aharonov–Bohm effect can be described as the result of an exchange of virtual photons between the solenoid and the quantum charged particle along its propagation through the interferometer, where both the particle and the solenoid interact locally with the quantum electromagnetic field. This interaction results in a local and gauge-independent phase generation for the particle propagation in each path of the interferometer. Here (...)
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  39.  17
    Photons: The History and Mental Models of Light Quanta.Klaus Hentschel - 2018 - Cham: Springer Verlag.
    This book focuses on the gradual formation of the concept of ‘light quanta’ or ‘photons’, as they have usually been called in English since 1926. The great number of synonyms that have been used by physicists to denote this concept indicates that there are many different mental models of what ‘light quanta’ are: simply finite, ‘quantized packages of energy’ or ‘bullets of light’? ‘Atoms of light’ or ‘molecules of light’? ‘Light corpuscles’ or ‘quantized waves’? Singularities of the field or spatially (...)
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  40.  12
    Visions: how science will revolutionize the 21st century.Michio Kaku - 1997 - New York: Anchor Books.
    In a spellbinding narrative that skillfully weaves together cutting-edge research among today's foremost scientists, theoretical physicist Michio Kaku--author of the bestselling book Hyperspace --presents a bold, exhilarating adventure into the science of tomorrow. In Visions, Dr. Kaku examines in vivid detail how the three scientific revolutions that profoundly reshaped the twentieth century--the quantum, biogenetic, and computer revolutions--will transform the way we live in the twenty-first century. The fundamental elements of matter and life--the particles of the atom and the nucleus (...)
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  41.  10
    Programm FAKE: Monte Carlo Eventgeneratoren als Werkzeug der Theorie in der frühen Hochenergiephysik.Arianna Borrelli - 2019 - NTM Zeitschrift für Geschichte der Wissenschaften, Technik und Medizin 27 (4):479-514.
    The term Monte Carlo method indicates any computer-aided procedure for numerical estimation that combines mathematical calculations with randomly generated numerical input values. Today it is an important tool in high energy physics while physicists and philosophers also often consider it a sort of virtual experiment. The Monte Carlo method was developed in the 1940s, in the context of U.S. American nuclear weapons research, an event often regarded as the origin of both computer simulation and “artificial reality” (Galison 1997). The (...)
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  42.  16
    “The language of Dirac’s theory of radiation”: the inception and initial reception of a tool for the quantum field theorist.Markus Ehberger - 2022 - Archive for History of Exact Sciences 76 (6):531-571.
    In 1927, Paul Dirac first explicitly introduced the idea that electrodynamical processes can be evaluated by decomposing them into virtual (modern terminology), energy non-conserving subprocesses. This mode of reasoning structured a lot of the perturbative evaluations of quantum electrodynamics during the 1930s. Although the physical picture connected to Feynman diagrams is no longer based on energy non-conserving transitions but on off-shell particles, emission and absorption subprocesses still remain their fundamental constituents. This article will access the introduction and the (...)
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  43.  90
    The superfluid as a source of all interactions.K. P. Sinha & E. C. G. Sudarshan - 1978 - Foundations of Physics 8 (11-12):823-831.
    The superfluid state of fermion-antifermion fields developed in our previous papers is generalized to include higher orbital and spin states. In addition to single-particle excitations, the system is capable of having real and virtual bound or quasibound composite excitations which are akin to bosons of spinJ P equal to0 −, 1−, 2+, etc. These pseudoscalar, vector, and tensor bosons can be massive or massless and provide the vehicles for strong, electromagnetic, weak, and gravitational interactions. The concept that the basic (...)
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  44.  83
    Four-space formulation of Dirac's equation.A. B. Evans - 1990 - Foundations of Physics 20 (3):309-335.
    Dirac's equation is reviewed and found to be based on nonrelativistic ideas of probability. A 4-space formulation is proposed that is completely Lorentzinvariant, using probability distributions in space-time with the particle's proper time as a parameter for the evolution of the wave function. This leads to a new wave equation which implies that the proper mass of a particle is an observable, and is sharp only in stationary states. The model has a built-in arrow of time, which is associated with (...)
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  45.  10
    Program FAKE: Monte Carlo Event Generators as Tools of Theory in Early High Energy Physics.Arianna Borrelli - 2019 - NTM Zeitschrift für Geschichte der Wissenschaften, Technik und Medizin 27 (4):479-514.
    The term Monte Carlo method indicates any computer-aided procedure for numerical estimation that combines mathematical calculations with randomly generated numerical input values. Today it is an important tool in high energy physics while physicists and philosophers also often consider it a sort of virtual experiment. The Monte Carlo method was developed in the 1940s, in the context of U.S. American nuclear weapons research, an event often regarded as the origin of both computer simulation and “artificial reality” (Galison 1997). The (...)
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  46. Niels Bohr’s Interpretation and the Copenhagen Interpretation—Are the Two Incompatible?Ravi Gomatam - 2007 - Philosophy of Science 74 (5):736-748.
    The Copenhagen interpretation, which informs the textbook presentation of quantum mechanics, depends fundamentally on the notion of ontological wave-particle duality and a viewpoint called “complementarity.” In this paper, Bohr's own interpretation is traced in detail and is shown to be fundamentally different from and even opposed to the Copenhagen interpretation in virtually all its particulars. In particular, Bohr's interpretation avoids the ad hoc postulate of wave function ‘collapse' that is central to the Copenhagen interpretation. The strengths and weakness of both (...)
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  47. Fondamenti geometrici e problemi filosofici dello spazio-tempo.Luciano Boi - 2012 - Isonomía. Revista de Teoría y Filosofía Del Derecho:1-37.
    The answer to some of the longstanding issues in the 20th century theoretical physics, such as those of the incompatibility between general relativity and quantum mechanics, the broken symmetries of the electroweak force acting at the subatomic scale and the missing mass of Higgs particle, and also those of the cosmic singularity and the black matter and energy, appear to be closely related to the problem of the quantum texture of space-time and the fluctuations of its underlying geometry. Each region (...)
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  48. Kuznetsov V. From studying theoretical physics to philosophical modeling scientific theories: Under influence of Pavel Kopnin and his school.Volodymyr Kuznetsov - 2017 - ФІЛОСОФСЬКІ ДІАЛОГИ’2016 ІСТОРІЯ ТА СУЧАСНІСТЬ У НАУКОВИХ РОЗМИСЛАХ ІНСТИТУТУ ФІЛОСОФІЇ 11:62-92.
    The paper explicates the stages of the author’s philosophical evolution in the light of Kopnin’s ideas and heritage. Starting from Kopnin’s understanding of dialectical materialism, the author has stated that category transformations of physics has opened from conceptualization of immutability to mutability and then to interaction, evolvement and emergence. He has connected the problem of physical cognition universals with an elaboration of the specific system of tools and methods of identifying, individuating and distinguishing objects from a scientific theory domain. The (...)
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  49. The c-aplpha Non Exclusion Principle and the vastly different internal electron and muon center of charge vacuum fluctuation geometry.Jim Wilson - forthcoming - Physics Essays.
    The electronic and muonic hydrogen energy levels are calculated very accurately [1] in Quantum Electrodynamics (QED) by coupling the Dirac Equation four vector (c ,mc2) current covariantly with the external electromagnetic (EM) field four vector in QED’s Interactive Representation (IR). The c -Non Exclusion Principle(c -NEP) states that, if one accepts c as the electron/muon velocity operator because of the very accurate hydrogen energy levels calculated, the one must also accept the resulting electron/muon internal spatial and time coordinate operators (ISaTCO) (...)
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    Soliton phenomenology.V. G. Makhanʹkov - 1989 - Boston: Kluwer Academic.
    Solitons, i.e. solitary localized waves with particle-like behaviour, and multi-solitons occur virtually everywhere. There is a good reason for that in that there is a solid, albeit somewhat heuristic argument which says that for wave-like phenomena the 'soliton approximation' is the next one after the linear one. It is also not too difficult via some searching in the voluminous literature - many hundreds of papers on solitons each year - to write down a long list of equations which admit soliton (...)
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