Quantum Mechanics

Edited by Michael Cuffaro (Ludwig Maximilians Universität, München)
Assistant editor: Radin Dardashti (Ludwig Maximilians Universität, München, University of Wuppertal)
About this topic
Summary Issues in the philosophy of quantum mechanics include first and foremost, its interpretation. Probably the most well-known of these is the 'orthodox' Copenhagen interpretation associated with Neils Bohr, Werner Heisenberg, Wolfgang Pauli, John von Neumann, and others. Beginning roughly at the midway point of the previous century, philosophers' attention began to be drawn towards alternative interpretations of the theory, including Bohmian mechanics, the relative state formulation of quantum mechanics and its variants (i.e., DeWit's "many worlds" variant, Albert and Loewer's "many minds" variant, etc.), and the dynamical collapse family of theories. One particular interpretational issue that has attracted very much attention since the seminal work of John Bell, is the issue of the extent to which quantum mechanical systems do or do not admit of a local realistic description. Bell's investigation of the properties of entangled quantum systems, inspired by the famous thought experiment of Einstein, Podolsky, and Rosen, seems to lead one to the conclusion that the only realistic "hidden variables" interpretation compatible with the quantum mechanical formalism is a nonlocal one. In recent years, some of the attention has focused on applications of quantum mechanics and their potential for illuminating quantum foundations. These include the sciences of quantum information and quantum computation. Additional areas of research include philosophical investigation into the extensions of nonrelativistic quantum mechanics (such as quantum electrodynamics and quantum field theory more generally), as well as more formal logico-mathematical investigations into the structure of quantum states, state spaces, and their dynamics.
Key works Bohr 1928 and Heisenberg 1930 expound upon what has since become known as the 'Copenhagen interpretation' of quantum mechanics. The famous 'EPR' thought experiment of Einstein et al 1935 aims to show that quantum mechanics is an incomplete theory which should be supplemented by additional ('hidden') parameters. Bohr 1935 replies. More on Bohr's views can be found in Faye 1991, FOLSE 1985. Inspired by the EPR thought experiment, Bell 2004 [1964] proves what has since become known as "Bell's theorem." This, and a related result due to Kochen & Specker 1967 serve to revive the discussion of hidden variables and alternative interpretations of quantum mechanics. Jarrett 1984 analyses the key "factorisability" assumption Bell uses to derive his theorem into two distinct sub-assumptions, which Jarrett refers to as "locality" and "completeness". Two important volumes dedicated to the topics of entanglement and nonlocality are Cushing & McMullin 1989 and Maudlin 2002. Among the more discussed alternative interpretations of quantum mechanics are: Bohmian mechanics (Bohm 1952, and see also Cushing et al 1996), and Everett's relative state formulation (Everett Iii 1973). The latter gives rise to many variants, including the many worlds, many minds, and decoherence-based approaches (see Saunders et al 2010). Other notable interpretations and alternative theories include dynamical collapse theories (Ghirardi et al 1986), as well as the Copenhagen-inspired QBist view (Fuchs 2003, Fuchs 2010). An attempt to axiomatize quantum mechanics in terms of information theoretic constraints, and a discussion of the relevance of this for the interpretation of quantum mechanics is given in Clifton et al 2002. Discussion of this and other issues in quantum information theory can be found in: Timpson 2004. Key works in the philosophy of quantum field theory include: Redhead 1995, Redhead 1994, Ruetsche 2011, Teller 1995.
Introductions Hughes 1989 is an excellent introduction to the formalism and interpretation of quantum mechanics. Albert 1992 is another, which focuses particularly on the problem of measurement in quantum mechanics.
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  1. Implicational quantum logic.Kenji Tokuo - forthcoming - Axiomathes:1-11.
    A non-classical subsystem of orthomodular quantum logic is proposed. This system employs two basic operations: the Sasaki hook as implication and the and-then operation as conjunction. These operations successfully satisfy modus ponens and the deduction theorem. In other words, they form an adjunction in terms of category theory. Two types of semantics are presented for this logic: one algebraic and one physical. The algebraic semantics deals with orthomodular lattices, as in traditional quantum logic. The physical semantics is given as a (...)
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  2. Color Experience May Be the Phenomenal Dual Aspect of Two-State Quantum Systems.Tal Hendel -
    Phenomenal color space, which is three-dimensional, contains six unary colors, i.e., colors that are not perceived as being composed of a combination of other colors. These colors are organized into three antipodal pairs which form three orthogonal axes in color space: red–green, yellow–blue, white–black. The three pairs of unary colors divide naturally into two phenomenally distinct groups: an achromatic group and a chromatic group. Here I show that if it is assumed that both the Hilbert space of quantum state vectors (...)
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  3. Dirac’s Refined Unification Of Quantum Mechanics And Special Relativity: An Intertheoretic Context.Rinat Magdievich Nugayev - forthcoming - Teorie Vědy / Theory of Science.
    One of the key episodes of history of modern physics – Paul Dirac’s startling contrivance of the relativistic theory of the electron – is elicited in the context of lucid epistemological model of mature theory change. The peculiar character of Dirac’s synthesis of special relativity and quantum mechanics is revealed by comparison with Einstein’s sophisticated methodology of the General Relativity contrivance. The subtle structure of Dirac’s scientific research program and first and foremost the odd principles that put up its powerful (...)
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  4. Unifying Hidden-Variable Problems From Quantum Mechanics by Logics of Dependence and Independence.Rafael Albert & Erich Grädel - forthcoming - Annals of Pure and Applied Logic:103088.
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  5. 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 physical reality. In (...)
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  6. Quantum Correlations and the Explanatory Power of Radical Metaphysical Hypotheses.Nina Emery - forthcoming - Philosophical Studies:1-24.
    I argue that, in at least one important sense, the hypothesis that you are a brain in a vat provides better explanations than the explanations provided by standard ways of interpreting our best scientific theories. This puts pressure on anyone who—like me!—wishes to resist taking this radical hypothesis seriously when doing science and scientifically-informed metaphysics. Insofar as our resistance is justified, it can’t be justified simply by claiming that the brain in a vast hypothesis is explanatorily impoverished.
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  7. On the Inconsistency of Separability and Quantum Mechanics.Saja Parvizian - manuscript
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  8. Quantum Computing and AI: Social, Ethical, and Geo-Political Implications.Greg Viggiano (ed.) - forthcoming
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  9. Quantum of Wisdom.Brett Karlan & Colin Allen - forthcoming - In Greg Viggiano (ed.), Quantum Computing and AI: Social, Ethical, and Geo-Political Implications. Toronto, ON, Canada: University of Toronto Press. pp. 1-6.
    Practical quantum computing devices and their applications to AI in particular are presently mostly speculative. Nevertheless, questions about whether this future technology, if achieved, presents any special ethical issues are beginning to take shape. As with any novel technology, one can be reasonably confident that the challenges presented by "quantum AI" will be a mixture of something new and something old. Other commentators (Sevilla & Moreno 2019), have emphasized continuity, arguing that quantum computing does not substantially affect approaches to value (...)
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  10. Are 'Particles' in Quantum Mechanics "Just a Way of Talking"?Christian de Ronde & Raimundo Fernández Mouján - unknown
    In this work we discuss the widespread use and application of the notion of 'particle' within the standard understanding of quantum mechanics, trying to prove how it is not just an innocent and unproblematic “way of talking”, as it is often claimed, but the expression of an atomist metaphysics that represents rather a way of perceiving and thinking that inadvertently determines our understanding of the mathematical formalism and the experimental content of quantum mechanics. We show how the retention of atomist (...)
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  11. How to Complete Quantum Mechanics, or, What It’s Like to Be a Naturally Creative Bohmian Beable.Robert Hanna - 2021 - Philosophical Investigations 15 (36):53-71.
    In another essay, I’ve argued by means of a formal analogy between the incompleteness of Principia Mathematica-style systems of mathematical logic and the incompleteness of the Standard Models in contemporary physics, that just as the fact of logico-mathematical incompleteness entails the existence of mathematical creativity, so too the fact of physico-mechanical incompleteness entails the existence of natural creativity. Building on that line of thought, in this essay I present a new and empirically-testable strategy for completing quantum mechanics. More precisely, I (...)
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  12. Foundations of Quantum Approaches to Consciousness.Hamid Faghanpour Azizi, Mehdi Golshani & Kourosh Nozari - 2021 - Philosophical Investigations 15 (36):151-170.
    As generally accepted, consciousness or mind and material brain are closely related to each other; but how? Quantum mechanics is a new pathway to understand the hard problem of consciousness and its relation to the brain. Consciousness has specific properties such as unity, irreducibility, non-locality, etc. The completely different features of classical physics hindered the success of scientists to study consciousness. But quantum mechanics with its features gave scientists hope to study consciousness. Several quantum approaches to consciousness have been proposed (...)
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  13. Informational foundations of quantum theory: critical reconsideration from the point of view of a phenomenologist.Tina Bilban - 2021 - Continental Philosophy Review 54 (4):581-594.
    Several contemporary interpretations of quantum mechanics use the concept of information as a tool for addressing and explaining the quantum world. In the article, I focus on Zeilinger-Brukner's informational foundations of quantum theory. I propose that with a phenomenological approach—which, unlike most of the contemporary interpretations of quantum mechanics, exceeds the mere dichotomy between realism and anti-realism—we can address the epistemological questions re-opened by IFQT and the parts of the interpretation that are recognized as problematic by its critics. After the (...)
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  14. Introduction: Phenomenology of Quantum Mechanics.Robert P. Crease, Delicia Antoinette Kamins & Paul Rubery - 2021 - Continental Philosophy Review 54 (4):405-412.
    The collection of essays in this special issue point toward the rich and diverse themes under which the phenomenologist might analyze quantum mechanics. The authors in the collection demonstrate that the tradition inaugurated by Husserl promises to dispel the many experiential quandaries of quantum mechanics. They interrogate the meaning of the theoretical entities described by the mathematical equations and analyze their manner of appearing to the physicist. To this end, the efforts of the authors show that increased clarity at forefront (...)
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  15. Merleau-Ponty’s phenomenological perspective on quantum mechanics.Pablo Pellegrini - 2021 - Continental Philosophy Review 54 (4):483-502.
    Merleau-Ponty’s remarks on quantum mechanics offer a unique perspective on the relationship between scientific results and their interpretation. This article elaborates Merleau-Ponty’s phenomenological perspective on quantum mechanics by considering the main texts in which he explicitly attends to this topic: namely, La Nature: notes cours du Collège de France and The Visible and the Invisible.
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  16. Shifting Presence: Giorgio Agamben’s and Karen Barad’s Reflections on Quantum Mechanics.Damiano Sacco - forthcoming - The European Legacy:1-17.
    This essay centres on two contributions—Giorgio Agamben’s What is Real? and Karen Barad’s Meeting the Universe Halfway —that deal with what they see as the import the quantum turn has...
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  17. Generalized Greenberger–Horne–Zeilinger Arguments from Quantum Logical Analysis.Karl Svozil - 2022 - Foundations of Physics 52 (1):1-23.
    The Greenberger–Horne–Zeilinger argument against noncontextual local hidden variables is recast in quantum logical terms of fundamental propositions, states and probabilities. Unlike Kochen–Specker- and Hardy-like configurations, this operator based argument proceeds within four nonintertwining contexts. The nonclassical performance of the GHZ argument is due to the choice or filtering of observables with respect to a particular state. We study the varieties of GHZ games one could play in these four contexts, depending on the chosen state of the GHZ basis.
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  18. Small Bohr: A Review of John L. Heilbron's Niels Bohr: A Very Short Introduction[REVIEW]K. Brad Wray - forthcoming - Metascience.
    This is a book review of John Heilbron's book _Niels Bohr: a very short introduction_.
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  19. Quantum foundations in a nutshell.Albert Solé & Antonio Vassallo - forthcoming - Metascience:1-4.
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  20. Introduction to Quantum Information Science.Vlatko Vedral - 2006 - Oxford, England: Oxford University Press.
    In addition to treating quantum communication, entanglement and algorithms, this book also addresses a number of miscellaneous topics, such as Maxwell's demon, Landauer's erasure, the Bekenstein bound and Caratheodory's treatment of the Second law of thermodyanmics.
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  21. Quantum Logic.Karl Svozil - 1998 - Singapore, Berlin, and Paris: Springer.
    Quantum Logic deals with the foundations of quantum mechanics and, related to it, the behaviour of finite, discrete deterministic systems. The quantum logical approach is particulalry suitable for the investigation and exclusion of certain hidden parameter models of quantum mechanics. Conversely, it can be used to embed quantum universes into classical ones. It is also highly relevant for the characterization of finite automation. This book has been written with a broad readership in mind. Great care has been given to the (...)
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  22. Quantum Logic.Peter Mittelstaedt - 1978 - Dordrecht, Netherland: Reidel.
    In 1936, G. Birkhoff and J. v. Neumann published an article with the title The logic of quantum mechanics'. In this paper, the authors demonstrated that in quantum mechanics the most simple observables which correspond to yes-no propositions about a quantum physical system constitute an algebraic structure, the most important proper ties of which are given by an orthocomplemented and quasimodular lattice Lq. Furthermore, this lattice of quantum mechanical proposi tions has, from a formal point of view, many similarities with (...)
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  23. Exploring the Quantum: Atoms, Cavities, and Photons.Serge Haroche & Jean-Michel Raimond - 2006 - Oxford, England: Oxford University Press.
    The quantum world obeys logic at odds with our common sense intuition. This weirdness is directly displayed in recent experiments juggling with isolated atoms and photons. They are reviewed in this book, combining theoretical insight and experimental description, and providing useful illustrations for learning and teaching of quantum mechanics.
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  24. Logic and Algebraic Structures in Quantum Computing.Jennifer Chubb, Ali Eskandarian & Valentina Harizanov (eds.) - 2014 - Cambridge, England: Cambridge University Press.
    Experts in the field explore the connections across physics, quantum logic, and quantum computing.
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  25. (November 2021 to 2014) The UNBELIEVABLE Similarities Between the Ideas of Some People (2011-2016) and My Ideas (2002-2008) in Physics (Quantum Mechanics, Cosmology), Cognitive Neuroscience, Philosophy of Mind, and Philosophy (This Manuscript Would Require a REVOLUTION in International Academy Environment!).Gabriel Vacariu - 2021 - Dissertation, University of Bucharest
    (October 2021 to 2014) The UNBELIEVABLE similarities between the ideas of some people (2011-2016) and my ideas (2002-2008) in physics (quantum mechanics, cosmology), cognitive neuroscience, philosophy of mind, and philosophy (this manuscript would require a REVOLUTION in international academy environment!).
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  26. A Few Notes on Quantum B-algebras.Shengwei Han & Xiaoting Xu - 2021 - Studia Logica 109 (6):1423-1440.
    In order to provide a unified framework for studying non-commutative algebraic logic, Rump and Yang used three axioms to define quantum B-algebras, which can be seen as implicational subreducts of quantales. Based on the work of Rump and Yang, in this paper we shall continue to investigate the properties of three axioms in quantum B-algebras. First, using two axioms we introduce the concept of generalized quantum B-algebras and prove that the opposite of the category GqBAlg of generalized quantum B-algebras is (...)
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  27. The Planck and Boltzmann Constants as Similar Generic Indicators of Stochasticity : Some Conceptual Implications of Quantum-Nonquantum Analogies.Spiridon Dumitru - 1993 - Physics Essays 6 (1):5–20.
    Starting from the fact, revealed by the author in recent publications, that the quantum uncertainty relations (UR) have authentic nonquantum analogs, it is shown that the Planck constant h also has such an analog, namely the Boltzmann constant k. Both h and k are shown to be generic indicators for the stochasticity property of the physical systems. Depending on its connection with h and k, the stochasticity can be onefold or twofold, respectively an intrinsic or extrinsic property. Earlier views regarding (...)
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  28. Viewing Quantum Charge From the Classical Vantage Point.Marian J. R. GIlton - unknown
    This paper argues for the value of interpreting classical gauge theories as part of the larger project of interpreting quantum field theories. It looks specifically at the benefit of studying a classical version of chromodynamics in order to better understand certain features of color charge in quantum chromodynamics. It discusses the ways in which the usual presentation of the conservation of color charge and the confinement of color charge serve to obscure the Lie-algebra-valued character of the conserved Noether charge, and (...)
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  29. A Survey on Uncertainty Relations and Quantum Measurements: Arguments for Lucrative Parsimony in Approaches of Matters.Dumitru Spiridon - 2021 - Progress in Physics 17 (1):38-70.
    This survey tries to investigate the truths and deficiencies of prevalent philosophy about Uncertainty Relations (UR) and Quantum Measurements (QMS). The respective philosophy, known as being eclipsed by unfinished controversies, is revealed to be grounded on six basic precepts. But one finds that all the respective precepts are discredited by insurmountable deficiencies. So, in regard to UR, the alluded philosophy discloses oneself to be an unjustified mythology. Then UR appear either as short-lived historical conventions or as simple and limited mathematical (...)
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  30. Entre a matéria e a forma: o problema da objetividade dos fenômenos quânticos em Werner Heisenberg.João Edson Gonçalves Cabral - 2019 - Dissertation, Universidade Federal Do Rio Grande Do Norte
  31. The Physics and the Philosophy of Time Reversal in Standard Quantum Mechanics.Cristian López - 2021 - Synthese 199 (5-6):14267-14292.
    A widespread view in physics holds that the implementation of time reversal in standard quantum mechanics must be given by an anti-unitary operator. In foundations and philosophy of physics, however, there has been some discussion about the conceptual grounds of this orthodoxy, largely relying on either its obviousness or its mathematical-physical virtues. My aim in this paper is to substantively change the traditional structure of the debate by highlighting the philosophical commitments underlying the orthodoxy. I argue that the persuasive force (...)
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  32. Quantum States: An Analysis Via the Orthogonality Relation.Shengyang Zhong - 2021 - Synthese 199 (5-6):15015-15042.
    From the Hilbert space formalism we note that five simple conditions are satisfied by the orthogonality relation between the states of a quantum system. We argue, by proving a mathematical theorem, that they capture the essentials of this relation. Based on this, we investigate the rationale behind these conditions in the form of six physical hypotheses. Along the way, we reveal an implicit theoretical assumption in theories of physics and prove a theorem which formalizes the idea that the Superposition Principle (...)
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  33. Quantum Mechanics and Fundamentality.V. Allori (ed.) - forthcoming - Synthese Library, Springer.
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  34. Essays on the Metaphysics of Quantum Mechanics.Eddy Keming Chen - 2019 - Dissertation, Rutgers University, New Brunswick
    What is the proper metaphysics of quantum mechanics? In this dissertation, I approach the question from three different but related angles. First, I suggest that the quantum state can be understood intrinsically as relations holding among regions in ordinary space-time, from which we can recover the wave function uniquely up to an equivalence class (by representation and uniqueness theorems). The intrinsic account eliminates certain conventional elements (e.g. overall phase) in the representation of the quantum state. It also dispenses with first-order (...)
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  35. Gabriel Vacariu, (October 2021 to 2014) The UNBELIEVABLE SIMILARITIES Between the Ideas of Some People (2011-2021) and My Ideas (2002-2008) in Physics (Quantum Mechanics, Cosmology), Cognitive Neuroscience, Philosophy of Mind, and Philosophy (This Manuscript Would Produce a REVOLUTION in Right International Academic Environment!) Here (the LIST is BELOW).Gabriel Vacariu - manuscript
    Gabriel Vacariu, (October 2021 to 2014) The UNBELIEVABLE SIMILARITIES between the ideas of some people (2011-2021) and my ideas (2002-2008) in physics (quantum mechanics, cosmology), cognitive neuroscience, philosophy of mind, and philosophy (this manuscript would produce a REVOLUTION in right international academic environment!) here (the LIST is BELOW) .
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  36. Opening a Can of Spacetime Worms: The Metaphysics of Persistence.Danny George Wardle - 2021 - Dissertation, University of Adelaide
    This thesis is composed of three essays on the perdurantist approach to persistence and identity over time. In Chapter 1, I discuss how the following papers are to be understood as parts of a unified perdurantist account of persistence over time. This chapter also outlines some of my philosophical assumptions and provides some background information about the metaphysics of persistence. In Chapter 2, I respond to the objection that the worm theory is unable to account for our intuitions about ordinary (...)
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  37. Observing a Quantum Measurement.Jay Lawrence - 2021 - Foundations of Physics 52 (1):1-17.
    With the example of a Stern–Gerlach measurement on a spin-1/2 atom, we show that a superposition of both paths may be observed compatibly with properties attributed to state collapse—for example, the singleness of outcomes. This is done by inserting a quantum two-state system in each path, capable of responding to the passage of the atom, and thus acting as a virtual detector. We then consider real measurements on the compound system of atomic spin and two ancillae. Nondestructive measurements of a (...)
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  38. The Metaphysical Foundations of Physics (Foreword to Special Issue).Carlos Romero - 2021 - Critica 53 (159):3-13.
    This is the introduction to the special issue of Crítica on the metaphysics of physics, featuring papers by Valia Allori, Tim Maudlin and Gustavo Esteban Romero.
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  39. Quantum mechanical atom models, legitimate explanations and mechanisms.Erik Weber, Merel Lefevere & Kristian Gonzalez Barman - 2021 - Foundations of Chemistry 23 (3):407-429.
    The periodic table is one of the best-known systems of classification in science. Because of the information it contains, it raises explanation-seeking questions. Quantum mechanical models of the behaviour of electrons may be seen as providing explanations in response to these questions. In this paper we first address the question ‘Do quantum mechanical models of atoms provide legitimate explanations?’ Because our answer is positive, our next question is ‘Are the explanations provided by quantum mechanical models of atoms mechanistic explanations?’. This (...)
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  40. Relational Event-Time in Quantum Mechanics.Matías Pasqualini, Olimpia Lombardi & Sebastian Fortin - 2021 - Foundations of Physics 52 (1):1-25.
    Some authors, inspired by the theoretical requirements for the formulation of a quantum theory of gravity, proposed a relational reconstruction of the quantum parameter-time—the time of the unitary evolution, which would make quantum mechanics compatible with relativity. The aim of the present work is to follow the lead of those relational programs by proposing a relational reconstruction of the event-time—which orders the detection of the definite values of the system’s observables. Such a reconstruction will be based on the modal-Hamiltonian interpretation (...)
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  41. Negations and Meets in Topos Quantum Theory.Yuichiro Kitajima - 2021 - Foundations of Physics 52 (1):1-27.
    The daseinisation is a mapping from an orthomodular lattice in ordinary quantum theory into a Heyting algebra in topos quantum theory. While distributivity does not always hold in orthomodular lattices, it does in Heyting algebras. We investigate the conditions under which negations and meets are preserved by daseinisation, and the condition that any element in the Heyting algebra transformed through daseinisation corresponds to an element in the original orthomodular lattice. We show that these conditions are equivalent, and that, not only (...)
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  42. Philosophy and the Interpretation of Quantum Physics.Badis Ydri - 2021 - UK: Institute of Physics (IOP).
    Quantum mechanics is perhaps the greatest scientific breakthrough ever achieved. It brought with it a seismic paradigm shift in our way of thinking about nature, and at the same time, it underpins most of the dramatic technological innovations of the modern era, as well as providing a profound lasting impact on our metaphysical conception of reality. This book provides oversight of many views on the interpretation of quantum physics and the wide philosophical debate that still embroils this subject. Following an (...)
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  43. Quantum Foundations of Statistical Mechanics and Thermodynamics.Orly Shenker - 2021 - In Eleanor Knox & Alastair Wilson (eds.), The Routledge Companion to Philosophy of Physics. Oxford: Routledge. pp. Ch. 29.
    Statistical mechanics is often taken to be the paradigm of a successful inter-theoretic reduction, which explains the high-level phenomena (primarily those described by thermodynamics) by using the fundamental theories of physics together with some auxiliary hypotheses. In my view, the scope of statistical mechanics is wider since it is the type-identity physicalist account of all the special sciences. But in this chapter, I focus on the more traditional and less controversial domain of this theory, namely, that of explaining the thermodynamic (...)
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  44. Correction to: Conditional Action and Quantum Versions of Maxwell’s Demon.Heinz-Jürgen Schmidt - 2021 - Foundations of Physics 51 (5):1-2.
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  45. How Many Properties of Spin Does a Particle Have?Alberto Corti & Marco Sanchioni - forthcoming - Studies in History and Philosophy of Science Part A.
    A common assumption in non-relativistic quantum mechanics is that self-adjoint operators mathematically represent properties of quantum systems. Focusing on spin, we argue that a natural view considers observables as determinable properties and their eigenvalues as their corresponding determinates. We provide a taxonomy of the different views that one can hold, once it is accepted that spin can be modelled with the determinable-determinate relation. In particular, we present the two main families of views, dubbed Spin Monism and Pluralism, and we show (...)
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  46. Is the Life-World Reduction Sufficient in Quantum Physics?Michel Bitbol - 2020 - Continental Philosophy Review 54 (4):563-580.
    According to Husserl, the epochè must be left incomplete. It is to be performed step by step, thus defining various layers of “reduction.” In phenomenology at least two such layers can be distinguished: the life-world reduction, and the transcendental reduction. Quantum physics was born from a particular variety of the life-world reduction: reduction to observables according to Heisenberg, and reduction to classical-like properties of experimental devices according to Bohr. But QBism has challenged this limited version of the phenomenological reduction advocated (...)
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  47. QBism and Relational Quantum Mechanics compared.Jacques Pienaar - 2021 - Foundations of Physics 51 (5):1-18.
    The subjective Bayesian interpretation of quantum mechanics and Rovelli’s relational interpretation of quantum mechanics are both notable for embracing the radical idea that measurement outcomes correspond to events whose occurrence is relative to an observer. Here we provide a detailed study of their similarities and especially their differences.
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  48. Quantum indeterminacy and the double-slit experiment.Claudio Calosi & Jessica Wilson - 2021 - Philosophical Studies 178 (10):3291-3317.
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  49. On the Foundation of Space and Time by Quantum-Events.Andreas Schlatter - 2021 - Foundations of Physics 52 (1):1-17.
    The true nature of space and time has been a topic of natural philosophy, passed down since the presocratic era. In modern times reflection has particularly been inspired by the physical theories of Newton and Einstein and, more recently, by the quest for a theory of quantum gravity. In this paper we want to specify the idea that material systems and their spatio-temporal distances emerge from quantum-events. We will show a mechanism, by which quantum-events induce a metric field between material (...)
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  50. The Weirdness Theorem and the Origin of Quantum Paradoxes.Alessio Benavoli, Alessandro Facchini & Marco Zaffalon - 2021 - Foundations of Physics 51 (5):1-39.
    We argue that there is a simple, unique, reason for all quantum paradoxes, and that such a reason is not uniquely related to quantum theory. It is rather a mathematical question that arises at the intersection of logic, probability, and computation. We give our ‘weirdness theorem’ that characterises the conditions under which the weirdness will show up. It shows that whenever logic has bounds due to the algorithmic nature of its tasks, then weirdness arises in the special form of negative (...)
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