Results for 'wavefunction'

24 found
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  1. Functionalising the wavefunction.Lorenzo Lorenzetti - 2022 - Studies in History and Philosophy of Science Part A 96 (C):141-153.
    Functionalism is the view that being x is to play the role of x. This paper defends a functionalist account of three-dimensional entities in the context of Wave Function Realism (WFR), that can explain in detail how we can recover three-dimensional entities out of the wavefunction. In particular, the essay advocates for a novel version of WFR in terms of a functional reductionist approach in the style of David Lewis. This account entails reduction of the upper entities to the (...)
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  2. Could wavefunctions simultaneously represent knowledge and reality?Jonte Hance, John Rarity & James Ladyman - 2022 - Quantum Studies: Mathematics and Foundations 9 (3):333-341.
    In discussion of the interpretation of quantum mechanics the terms ‘ontic’ and ‘epistemic’ are often used in the sense of pertaining to what exists, and pertaining to cognition or knowledge respectively. The terms are also often associated with the formal definitions given by Harrigan and Spekkens for the wavefunction in quantum mechanics to be ψ-ontic or ψ-epistemic in the context of the ontological models framework. The formal definitions are contradictories, so that the wavefunction can be either ψ-epistemic or (...)
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  3. A Model of Wavefunction Collapse in Discrete Space-Time.Shan Gao - 2006 - International Journal of Theoretical Physics 45 (10):1965-1979.
    We give a new argument supporting a gravitational role in quantum collapse. It is demonstrated that the discreteness of space-time, which results from the proper combination of quantum theory and general relativity, may inevitably result in the dynamical collapse of thewave function. Moreover, the minimum size of discrete space-time yields a plausible collapse criterion consistent with experiments. By assuming that the source to collapse the wave function is the inherent random motion of particles described by the wave function, we further (...)
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  4. Losing Sight of the Forest for the Ψ: Beyond the Wavefunction Hegemony.Alisa Bokulich - 2020 - In Steven French & Juha Saatsi (eds.), Scientific Realism and the Quantum. Oxford: Oxford University Press.
    Traditionally Ψ is used to stand in for both the mathematical wavefunction (the representation) and the quantum state (the thing in the world). This elision has been elevated to a metaphysical thesis by advocates of the view known as wavefunction realism. My aim in this paper is to challenge the hegemony of the wavefunction by calling attention to a little-known formulation of quantum theory that does not make use of the wavefunction in representing the quantum state. (...)
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  5. The Governing Conception of the Wavefunction.Nina Emery - 2022 - In Valia Allori (ed.), Quantum Mechanics and Fundamentality: Naturalizing Quantum Theory between Scientific Realism and Ontological Indeterminacy. Cham: Springer. pp. 283-302.
    I distinguish between two different ways in which the wavefunction might play a role in explaining the behavior of quantum systems and argue that a satisfactory account of quantum ontology will make it possible for the wavefunction to explain the behavior of quantum systems in both of these way. I then show how this constraint has the potential to impact two quite different accounts of quantum ontology.
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  6. There is no measurement problem for Humeans.Chris Dorst - 2021 - Noûs 57 (2):263-289.
    The measurement problem concerns an apparent conflict between the two fundamental principles of quantum mechanics, namely the Schrödinger equation and the measurement postulate. These principles describe inconsistent behavior for quantum systems in so-called "measurement contexts." Many theorists have thought that the measurement problem can only be resolved by proposing a mechanistic explanation of (genuine or apparent) wavefunction collapse that avoids explicit reference to "measurement." However, I argue here that the measurement problem dissolves if we accept Humeanism about laws of (...)
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  7. Quantum Measurement, Complexity and Discrete Physics.Martin Leckey - 2003 - arXiv.
    This paper presents a new modified quantum mechanics, Critical Complexity Quantum Mechanics, which includes a new account of wavefunction collapse. This modified quantum mechanics is shown to arise naturally from a fully discrete physics, where all physical quantities are discrete rather than continuous. I compare this theory with the spontaneous collapse theories of Ghirardi, Rimini, Weber and Pearle and discuss some implications of these theories and CCQM for a realist view of the quantum realm.
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  8. The Wave Function and Its Evolution.Shan Gao - 2011
    The meaning of the wave function and its evolution are investigated. First, we argue that the wave function in quantum mechanics is a description of random discontinuous motion of particles, and the modulus square of the wave function gives the probability density of the particles being in certain locations in space. Next, we show that the linear non-relativistic evolution of the wave function of an isolated system obeys the free Schrödinger equation due to the requirements of spacetime translation invariance and (...)
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  9. The wave function as a true ensemble.Jonte Hance & Sabine Hossenfelder - 2022 - Proceedings of the Royal Society 478 (2262).
    In quantum mechanics, the wavefunction predicts probabilities of possible measurement outcomes, but not which individual outcome is realised in each run of an experiment. This suggests that it describes an ensemble of states with different values of a hidden variable. Here, we analyse this idea with reference to currently known theorems and experiments. We argue that the ψ-ontic/epistemic distinction fails to properly identify ensemble interpretations and propose a more useful definition. We then show that all local ψ-ensemble interpretations which (...)
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  10.  69
    A Commentary on Robin Hendry’s Views on Molecular Structure, Emergence and Chemical Bonding.Eric Scerri - 2023 - In João L. Cordovil, Gil Santos & Davide Vecchi (eds.), New Mechanism Explanation, Emergence and Reduction. Springer. pp. 161 - 177.
    In this article I examine several related views expressed by Robin Hendry concerning molecular structure, emergence and chemical bonding. There is a long-standing problem in the philosophy of chemistry arising from the fact that molecular structure cannot be strictly derived from quantum mechanics. Two or more compounds which share a molecular formula, but which differ with respect to their structures, have identical Hamiltonian operators within the quantum mechanical formalism. As a consequence, the properties of all such isomers yield precisely the (...)
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  11. The physics and metaphysics of Tychistic Bohmian Mechanics.Patrick Duerr & Alexander Ehmann - 2021 - Studies in History and Philosophy of Science Part A 90:168-183.
    The paper takes up Bell's “Everett theory” and develops it further. The resulting theory is about the system of all particles in the universe, each located in ordinary, 3-dimensional space. This many-particle system as a whole performs random jumps through 3N-dimensional configuration space – hence “Tychistic Bohmian Mechanics”. The distribution of its spontaneous localisations in configuration space is given by the Born Rule probability measure for the universal wavefunction. Contra Bell, the theory is argued to satisfy the minimal desiderata (...)
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  12. On structural accounts of model-explanations.Martin King - 2016 - Synthese 193 (9):2761-2778.
    The focus in the literature on scientific explanation has shifted in recent years towards model-based approaches. In recent work, Alisa Bokulich has argued that idealization has a central role to play in explanation. Bokulich claims that certain highly-idealized, structural models can be explanatory, even though they are not considered explanatory by causal, mechanistic, or covering law accounts of explanation. This paper focuses on Bokulich’s account in order to make the more general claim that there are problems with maintaining that a (...)
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  13. Non-separability, locality and criteria of reality: a reply to Waegell and McQueen.Paolo Faglia - manuscript
    Using a ‘reformulation of Bell’s theorem’, Waegell and McQueen (2020) argue that any empirically adequate theory that is local and does not involve retro-causation or fine-tuning must be a many-worlds theory. They go on to analyze several prominent many-worlds interpretations and conclude that non-separable many-worlds theories whose ontology is given by the wavefunction involve superluminal causation, while separable many-worlds theories (e.g. Waegell, 2021; Deutsch and Hayden 2000) do not. I put forward three claims. (A) I challenge their argument for (...)
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  14. Have underground radiation measurements refuted the Orch OR theory?Kelvin J. McQueen - forthcoming - Physics of Life Reviews.
    In [1] it is claimed that, based on radiation emission measurements described in [2], a certain “variant” of the Orch OR theory has been refuted. I agree with this claim. However, the significance of this result for Orch OR per se is unclear. After all, the refuted “variant” was never advocated by anyone, and it contradicts the views of Hameroff and Penrose (hereafter: HP) who invented Orch OR [3]. My aim is to get clear on this situation. I argue that (...)
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  15. space time normalisation in GWRf Theory.Joe Coles - 2023 - International Journal of Quantum Foundations 9 (2).
    Roderich Tumulka’s GRWf theory offers a simple, realist and relativistic solution to the measurement problem of quantum mechanics. It is achieved by the introduction of a stochastic dynamical collapse of the wavefunction. An issue with dynamical collapse theories is that they involve an amendment to the Schrodinger equation; amending the dynamics of such a tried and tested theory is seen by some as problematic. This paper proposes an alteration to GRWf that avoids the need to amend the Schrodinger equation (...)
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  16. Taking models seriously and being a linguistic realist.Raoni Wohnrath Arroyo & Gilson Olegario da Silva - 2022 - Principia: An International Journal of Epistemology 26 (1):73-94.
    Carnap's conception of linguistic frameworks is widespread; however, it is not entirely clear nor consensual to pinpoint what is the influence of his stance within the traditional realist/anti-realist debate. In this paper, we place Carnap as a proponent of a scientific realist stance, by presenting what he called “linguistic realism”. Some possible criticisms are considered, and a case study is offered with wave function realism, a popular position in the philosophy of quantum mechanics.
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  17. Quantum mechanics as a deterministic theory of a continuum of worlds.Kim Joris Boström - 2015 - Quantum Studies: Mathematics and Foundations 2 (3):315-347.
    A non-relativistic quantum mechanical theory is proposed that describes the universe as a continuum of worlds whose mutual interference gives rise to quantum phenomena. A logical framework is introduced to properly deal with propositions about objects in a multiplicity of worlds. In this logical framework, the continuum of worlds is treated in analogy to the continuum of time points; both “time” and “world” are considered as mutually independent modes of existence. The theory combines elements of Bohmian mechanics and of Everett’s (...)
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  18. To be a realist about quantum theory.Hans Halvorson - 2019 - In Olimpia Lombardi (ed.), Quantum Worlds: Perspectives on the Ontology of Quantum Mechanics.
    I look at the distinction between between realist and antirealist views of the quantum state. I argue that this binary classification should be reconceived as a continuum of different views about which properties of the quantum state are representationally significant. What's more, the extreme cases -- all or none --- are simply absurd, and should be rejected by all parties. In other words, no sane person should advocate extreme realism or antirealism about the quantum state. And if we focus on (...)
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  19. On the Compatibility Between Quantum Theory and General Relativity.Cristinel Stoica - manuscript
    I propose a gentle reconciliation of Quantum Theory and General Relativity. It is possible to add small, but unshackling constraints to the quantum fields, making them compatible with General Relativity. Not all solutions of the Schrodinger's equation are needed. I show that the continuous and spatially separable solutions are sufficient for the nonlocal manifestations associated with entanglement and wavefunction collapse. After extending this idea to quantum fields, I show that Quantum Field Theory can be defined in terms of partitioned (...)
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  20. Protective Measurement and the Meaning of the Wave Function.Shan Gao - 2011
    This article analyzes the implications of protective measurement for the meaning of the wave function. According to protective measurement, a charged quantum system has mass and charge density proportional to the modulus square of its wave function. It is shown that the mass and charge density is not real but effective, formed by the ergodic motion of a localized particle with the total mass and charge of the system. Moreover, it is argued that the ergodic motion is not continuous but (...)
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  21. Three possible implications of spacetime discreteness.Shan Gao - 2013
    We analyze the possible implications of spacetime discreteness for the special and general relativity and quantum theory. It is argued that the existence of a minimum size of spacetime may explain the invariance of the speed of light in special relativity and Einstein’s equivalence principle in general relativity. Moreover, the discreteness of spacetime may also result in the collapse of the wave function in quantum mechanics, which may provide a possible solution to the quantum measurement problem. These interesting results might (...)
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  22. Gabriel Vacariu (second April 2019 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!). [REVIEW]Gabriel Vacariu -
    COTENT -/- (second April 2019) Why so many people (from so many countries/domains/on so many topics) have already plagiarized my ideas? (Gabriel Vacariu) -/- Some preliminary comments Introduction: The EDWs perspective in my article from 2005 and my book from 2008 -/- I. PHYSICS, COGNITIVE NEUROSCIENCE, PHILOSOPHY (‘REBORN DINOSAURS’ ) • (2016) Did Sean Carroll’s ideas (California Institute of Technology, USA) plagiarize my ideas (2002-2010) (within the EDWs framework)? • (2016) Frank Wilczek’s ideas (Nobel Prize in Physics) (Philosophy of Mind (...)
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  23. (June 2019 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.Gabriel Vacariu - manuscript
    COTENT -/- (April 2019) Why so many people (from so many countries/domains/on so many topics) have already plagiarized my ideas? (Gabriel Vacariu) -/- Some preliminary comments Introduction: The EDWs perspective in my article from 2005 and my book from 2008 -/- I. PHYSICS, COGNITIVE NEUROSCIENCE, PHILOSOPHY (‘REBORN DINOSAURS’) • (2016) Sean Carroll (California Institute of Technology, USA) • (2016) Frank Wilczek (Nobel Prize in Physics) • (2017-2019 - NEW March 2019) Carlo Rovelli in three books (2015, 2017) to my ideas (...)
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  24. (June 2019 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.Gabriel Vacariu - manuscript
    COTENT -/- (April 2019) Why so many people (from so many countries/domains/on so many topics) have already plagiarized my ideas? (Gabriel Vacariu) -/- Some preliminary comments Introduction: The EDWs perspective in my article from 2005 and my book from 2008 -/- I. PHYSICS, COGNITIVE NEUROSCIENCE, PHILOSOPHY (‘REBORN DINOSAURS’) • (2016) Sean Carroll (California Institute of Technology, USA) • (2016) Frank Wilczek (Nobel Prize in Physics) • (2017-2019 - NEW March 2019) Carlo Rovelli in three books (2015, 2017) to my ideas (...)
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