Results for 'Spontaneous collapse model'

958 found
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  1.  31
    A Proposal for a New Kind of Spontaneous Collapse Model.Nicolò Piccione - 2023 - Foundations of Physics 54 (1):1-24.
    Spontaneous collapse models are modifications of standard quantum mechanics in which a physical mechanism is responsible for the collapse of the wavefunction, thus providing a way to solve the so-called “measurement problem”. The two most famous of these models are the Ghirardi–Rimini–Weber (GRW) model and the Continuous Spontaneous Localisation (CSL) models. Here, we propose a new kind of non-relativistic spontaneous collapse model based on the idea of collapse points situated at fixed (...)
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  2.  27
    A Model of Spontaneous Collapse with Energy Conservation.D. W. Snoke - 2021 - Foundations of Physics 51 (5):1-10.
    A model of spontaneous collapse of fermionic degrees of freedom in a quantum field is presented which has the advantages that it explicitly maintains energy conservation and gives results in agreement with an existing numerical method for calculating quantum state evolution, namely the quantum trajectories model.
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  3.  14
    The CSL Collapse Model and Spontaneous Radiation: An Update.Frank T. Avignone, Juan I. Collar, James Ring & Philip Pearle - 1999 - Foundations of Physics 29 (3):465-480.
    A brief review is given of the continuous spontaneous localization (CSL) model, in which a classical field interacts with quantized particles to cause dynamical wavefunction collapse. One of the model's predictions is that particles “spontaneously” gain energy at a slow rate. When applied to the excitation of a nucleon in a Ge nucleus, it is shown how a limit on the relative collapse rates of neutron and proton can be obtained, and a rough estimate is (...)
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  4.  63
    Constraint on collapse models by limit on spontaneous x-ray emission in Ge.Brian Collett, Philip Pearle, Frank Avignone & Shmuel Nussinov - 1995 - Foundations of Physics 25 (10):1399-1412.
    The continuous spontaneous localization (CSL) model modifies Schrödinger's equation so that the collapse of the state vector is described as a physical process (a special interaction of particles with a universal fluctuating field). A consequence of the model is that an electron in an atom should occasionally get “spontaneously” knocked out of the atom. The CSL ionization rate for the 1s electrons in the Ge atom is calculated and compared with an experimental upper limit for the (...)
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  5.  71
    The Effect of Spontaneous Collapses on Neutrino Oscillations.Sandro Donadi, Angelo Bassi, Luca Ferialdi & Catalina Curceanu - 2013 - Foundations of Physics 43 (9):1066-1089.
    We compute the effect of collapse models on neutrino oscillations. The effect of the collapse is to modify the evolution of the spatial part of the wave function and we will show that this indirectly amounts to a change on the flavor components. For the analysis we use the mass proportional CSL model, and perform the calculation to second order perturbation theory. As we will show, the CSL effect is very small—mainly due to the very small mass (...)
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  6.  83
    Are Collapse Models Testable via Flavor Oscillations?Sandro Donadi, Angelo Bassi, Catalina Curceanu, Antonio Di Domenico & Beatrix C. Hiesmayr - 2013 - Foundations of Physics 43 (7):813-844.
    Collapse models predict the spontaneous collapse of the wave function, in order to avoid the emergence of macroscopic superpositions. In their mass-dependent formulation, they claim that the collapse of any system’s wave function depends on its mass. Neutral K, D, B mesons are oscillating systems that are given by Nature as superposition of two distinct mass eigenstates. Thus they are unique laboratory for testing collapse models that are sensitive to the mass. In this paper we (...)
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  7. The CSL collapse model and spontaneous radiation: an update.Philip Pearle, James Ring, Juan I. Collar & Frank T. Avignone Iii - 1999 - Foundations of Physics 29 (3):465-480.
  8.  63
    The CSL Collapse Model and Spontaneous Radiation: An Update. [REVIEW]Philip Pearle, James Ring, Juan I. Collar & I. I. I. Avignone - 1999 - Foundations of Physics 29 (3):465-480.
    A brief review is given of the continuous spontaneous localization (CSL) model, in which a classical field interacts with quantized particles to cause dynamical wavefunction collapse. One of the model's predictions is that particles “spontaneously” gain energy at a slow rate. When applied to the excitation of a nucleon in a Ge nucleus, it is shown how a limit on the relative collapse rates of neutron and proton can be obtained, and a rough estimate is (...)
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  9.  77
    Integrated Information-Induced Quantum Collapse.Kobi Kremnizer & André Ranchin - 2015 - Foundations of Physics 45 (8):889-899.
    We present a novel spontaneous collapse model where size is no longer the property of a physical system which determines its rate of collapse. Instead, we argue that the rate of spontaneous localization should depend on a system’s quantum Integrated Information, a novel physical property which describes a system’s capacity to act like a quantum observer. We introduce quantum Integrated Information, present our QII collapse model and briefly explain how it may be experimentally (...)
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  10.  52
    Consequence for Wavefunction Collapse Model of the Sudbury Neutrino Observatory Experiment.Gordon Jones, Philip Pearle & James Ring - 2004 - Foundations of Physics 34 (10):1467-1474.
    It is shown that data on the dissociation rate of deuterium obtained in an experiment at the Sudbury Neutrino Observatory provides evidence that the Continuous Spontaneous Localization wavefunction collapse model should have mass–proportional coupling to be viable.
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  11. A consciousness-based quantum objective collapse model.Elias Okon & Miguel Ángel Sebastián - 2020 - Synthese 197 (9):3947-3967.
    Ever since the early days of quantum mechanics it has been suggested that consciousness could be linked to the collapse of the wave function. However, no detailed account of such an interplay is usually provided. In this paper we present an objective collapse model where the collapse operator depends on integrated information, which has been argued to measure consciousness. By doing so, we construct an empirically adequate scheme in which superpositions of conscious states are dynamically suppressed. (...)
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  12. Wavefunction Collapse and Random Walk.Brian Collett & Philip Pearle - 2003 - Foundations of Physics 33 (10):1495-1541.
    Wavefunction collapse models modify Schrödinger's equation so that it describes the rapid evolution of a superposition of macroscopically distinguishable states to one of them. This provides a phenomenological basis for a physical resolution to the so-called “measurement problem.” Such models have experimentally testable differences from standard quantum theory. The most well developed such model at present is the Continuous Spontaneous Localization (CSL) model in which a universal fluctuating classical field interacts with particles to cause collapse. (...)
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  13.  57
    Spontaneously Emitted X-rays: An Experimental Signature of the Dynamical Reduction Models.C. Curceanu, S. Bartalucci, A. Bassi, M. Bazzi, S. Bertolucci, C. Berucci, A. M. Bragadireanu, M. Cargnelli, A. Clozza, L. De Paolis, S. Di Matteo, S. Donadi, A. D’Uffizi, J. -P. Egger, C. Guaraldo, M. Iliescu, T. Ishiwatari, M. Laubenstein, J. Marton, E. Milotti, A. Pichler, D. Pietreanu, K. Piscicchia, T. Ponta, E. Sbardella, A. Scordo, H. Shi, D. L. Sirghi, F. Sirghi, L. Sperandio, O. Vazquez Doce & J. Zmeskal - 2016 - Foundations of Physics 46 (3):263-268.
    We present the idea of searching for X-rays as a signature of the mechanism inducing the spontaneous collapse of the wave function. Such a signal is predicted by the continuous spontaneous localization theories, which are solving the “measurement problem” by modifying the Schrödinger equation. We will show some encouraging preliminary results and discuss future plans and strategy.
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  14.  73
    Wavefunction Collapse and Conservation Laws.Philip Pearle - 2000 - Foundations of Physics 30 (8):1145-1160.
    It is emphasized that the collapse postulate of standard quantum theory can violate conservation of energy-momentum and there is no indication from where the energy-momentum comes or to where it goes. Likewise, in the Continuous Spontaneous Localization (CSL) dynamical collapse model, particles gain energy on average. In CSL, the usual Schrödinger dynamics is altered so that a randomly fluctuating classical field interacts with quantized particles to cause wavefunction collapse. In this paper it is shown how (...)
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  15.  22
    Spontaneous Localization Theories.Valia Allori - 2022 - In Olival Freire, Oxford Handbook on the History of Interpretations of Quantum Mechanics.
    Spontaneous localization theories are a class of quantum theories which solve the so-called measurement problem by non-linearly and stochastically modifying the Schrödinger dynamics. In this paper I briefly explain where these theories are coming from, what their driving ideas and main features are, and how they were historically developed. Also, I discuss their empirical and ontological adequacy, as well as their relativistic extensions and their experimental confirmation.
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  16. The Black Hole Information Paradox and the Collapse of the Wave Function.Elias Okon & Daniel Sudarsky - 2015 - Foundations of Physics 45 (4):461-470.
    The black hole information paradox arises from an apparent conflict between the Hawking black hole radiation and the fact that time evolution in quantum mechanics is unitary. The trouble is that while the former suggests that information of a system falling into a black hole disappears, the latter implies that information must be conserved. In this work we discuss the current divergence in views regarding the paradox, we evaluate the role that objective collapse theories could play in its resolution (...)
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  17.  74
    Gravity-Related Wave Function Collapse: Is Superfluid He Exceptional?Lajos Diósi - 2014 - Foundations of Physics 44 (5):483-491.
    The gravity-related model of spontaneous wave function collapse, a longtime hypothesis, damps the massive Schrödinger Cat states in quantum theory. We extend the hypothesis and assume that spontaneous wave function collapses are responsible for the emergence of Newton interaction. Superfluid helium would then show significant and testable gravitational anomalies.
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  18.  63
    The Conway-Kochen Argument and Relativistic GRW Models.Angelo Bassi & GianCarlo Ghirardi - 2007 - Foundations of Physics 37 (2):169-185.
    In a recent paper, Conway and Kochen proposed what is now known as the “Free Will theorem” which, among other things, should prove the impossibility of combining GRW models with special relativity, i.e., of formulating relativistically invariant models of spontaneous wavefunction collapse. Since their argument basically amounts to a non-locality proof for any theory aiming at reproducing quantum correlations, and since it was clear since very a long time that any relativistic collapse model must be non-local (...)
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  19. The indeterminate present and the open future.Cristian Mariani & Giuliano Torrengo - 2021 - Synthese 199 (1-2):3923-3944.
    Explanations of the genuine openness of the future often appeal to objective indeterminacy. According to the received view, such indeterminacy is indeterminacy of certain future-tensed state of affairs that presently obtain. We shall call this view the weak indeterminate present, to distinguish it from the view we will defend in this paper, which we dub the strong indeterminate present. According to our view, unsettledness of the future is grounded on the present indeterminacy of some present-tensed state of affairs. In order (...)
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  20.  49
    “It from Bit” and Quantum Mechanics.Ali Barzegar, Afshin Shafiee & Mostafa Taqavi - 2020 - Foundations of Science 25 (2):375-384.
    John Archibald Wheeler is one of the staunchest advocates of the idea that information is more fundamental than anything else in physics. In this paper, we examine the status of this idea summarized in Wheeler’s slogan ‘it from bit’ in the context of Bohmian Mechanics and spontaneous collapse models. We will argue that any question about the status of ‘it from bit’ crucially depends on the particular interpretation of these theories one favors.
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  21. Interpreting spontaneous collapse theories.Peter J. Lewis - 2004 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 36 (1):165-180.
    Spontaneous collapse theories of quantum mechanics require an interpretation if their claim to solve the measurement problem is to be vindicated. The most straightforward interpretation rule, the fuzzy link, generates a violation of common sense known as the counting anomaly. Recently, a consensus has developed that the mass density link provides an appropriate interpretation of spontaneous collapse theories that avoids the counting anomaly. In this paper, I argue that the mass density link violates common sense in (...)
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  22.  65
    Spontaneous Collapse Theories and Temporal Primitivism about Time’s Direction.Cristian López - 2022 - Foundations of Physics 52 (5):1-22.
    Two views on the direction of time can be distinguished—primitivism and non-primitivism. According to the former, time’s direction is an in-built, fundamental property of the physical world. According to the latter, time’s direction is a derivative property of a fundamentally directionless reality. In the literature, non-primitivism has been widely supported since most our fundamental dynamical laws are time-reversal invariant. In this paper, I offer a way out to the primitivist. I argue that we do have good grounds to support a (...)
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  23. Quantum states for primitive ontologists: A case study.Gordon Belot - 2012 - European Journal for Philosophy of Science 2 (1):67-83.
    Under so-called primitive ontology approaches, in fully describing the history of a quantum system, one thereby attributes interesting properties to regions of spacetime. Primitive ontology approaches, which include some varieties of Bohmian mechanics and spontaneous collapse theories, are interesting in part because they hold out the hope that it should not be too difficult to make a connection between models of quantum mechanics and descriptions of histories of ordinary macroscopic bodies. But such approaches are dualistic, positing a quantum (...)
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  24.  47
    Mathematical Formalism for Nonlocal Spontaneous Collapse in Quantum Field Theory.D. W. Snoke - 2023 - Foundations of Physics 53 (2):1-24.
    Previous work has shown that spontaneous collapse of Fock states of identical fermions can be modeled as arising from random Rabi oscillations between two states. In this paper, a mathematical formalism is presented to incorporate this into many-body quantum field theory. This formalism allows for nonlocal collapse in the context of a relativistic system. While there is no absolute time-ordering of events, this approach allows for a coherent narrative of the collapse process.
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  25. Four strategies for dealing with the counting anomaly in spontaneous collapse theories of quantum mechanics.Peter J. Lewis - 2003 - International Studies in the Philosophy of Science 17 (2):137 – 142.
    A few years ago, I argued that according to spontaneous collapse theories of quantum mechanics, arithmetic applies to macroscopic objects only as an approximation. Several authors have written articles defending spontaneous collapse theories against this charge, including Bassi and Ghirardi, Clifton and Monton, and now Frigg. The arguments of these authors are all different and all ingenious, but in the end I think that none of them succeeds, for reasons I elaborate here. I suggest a fourth (...)
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  26.  29
    On Quantum Non-Unitarity as a Basis for the Second Law of Thermodynamics.Ruth Kastner - unknown
    It was first suggested by Albert that the existence of real, physical non-unitarity at the quantum level would yield a complete explanation for the increase of entropy over time in macroscopic systems. An alternative understanding of the source of non-unitarity is presented herein, in terms of the Transactional Interpretation. The present model provides a specific physical justification for Boltzmann’s Stosszahlansatz, thereby changing its status from an ad hoc postulate to a theoretically grounded result, without requiring any change to the (...)
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  27. The problem of ontology for spontaneous collapse theories.Bradley Monton - 2004 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 35 (3):407-421.
    The question of how to interpret spontaneous collapse theories of quantum mechanics is an open one. One issue involves what link one should use to go from wave function talk to talk of ordinary macroscopic objects. Another issue involves whether that link should be taken ontologically seriously. In this paper, I ague that the link should be taken ontologically seriously; I argue against an ontology consisting solely of the wave function. I then consider three possible links: the fuzzy (...)
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  28. Collapse Models:a theoretical, experimental and philosophical review.Mauro Dorato, Angelo Bassi & Hendrik Ulbricht - 2023 - Entropy 25 (645):1.
    In this paper, we review and connect the three essential conditions needed by the collapse model to achieve a complete and exact formulation, namely the theoretical, the experimental, and the ontological ones. These features correspond to the three parts of the paper. In any empirical science, the first two features are obviously connected but, as is well known, among the different formulations and interpretations of non-relativistic quantum mechanics, only collapse models, as the paper well illustrates with a (...)
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  29. Biological Autonomy.Attila Grandpierre & Menas Kafatos - 2012 - Philosophy Study 2 (9):631-649.
    We argue that genuine biological autonomy, or described at human level as free will, requires taking into account quantum vacuum processes in the context of biological teleology. One faces at least three basic problems of genuine biological autonomy: (1) if biological autonomy is not physical, where does it come from? (2) Is there a room for biological causes? And (3) how to obtain a workable model of biological teleology? It is shown here that the solution of all these three (...)
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  30.  50
    Axioms for finite collapse models of arithmetic.Andrew Tedder - 2015 - Review of Symbolic Logic 8 (3):529-539.
    The collapse models of arithmetic are inconsistent, nontrivial models obtained from ℕ and set out in the Logic of Paradox (LP). They are given a general treatment by Priest (Priest, 2000). Finite collapse models are decidable, and thus axiomatizable, because finite. LP, however, is ill-suited to normal axiomatic reasoning, as it invalidates Modus Ponens, and almost all other usual conditional inferences. I set out a logic, A3, first given by Avron (Avron, 1991), and give a first order axiom (...)
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  31.  37
    Time Reversal Symmetry and Collapse Models.D. J. Bedingham & O. J. E. Maroney - 2017 - Foundations of Physics 47 (5):670-696.
    Dynamical collapse models embody the idea of a physical collapse of the wave function in a mathematically well-defined way. They involve modifications to the standard rules of quantum theory in order to describe collapse as a physical process. This appears to introduce a time reversal asymmetry into the dynamics since the state at any given time depends on collapses in the past but not in the future. Here we challenge this conclusion by demonstrating that, subject to specified (...)
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  32.  31
    Temporal Global Correlations in Time-Symmetric Collapse Models.Pascal Rodríguez-Warnier - 2023 - Foundations of Physics 53 (3):1-15.
    It has been recently argued that by Leifer and Pusey, and Price, that time-symmetric quantum mechanics must entail retrocausality. Adlam responds that such theories might also entail ‘spooky action at a distance’. This paper proposes a third alternative: time-symmetric quantum mechanics might entail temporal global correlations. Unlike the traditional analysis of time symmetries in quantum mechanics, which consider linear and unitary interpretations, this paper considers the time-symmetric collapse models advanced by Bedingham and Maroney. These models are specially interesting since (...)
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  33.  21
    Connecting the Dots: Mott for Emulsions, Collapse Models, Colored Noise, Frame Dependence of Measurements, Evasion of the “Free Will Theorem”.Stephen L. Adler - 2018 - Foundations of Physics 48 (11):1557-1567.
    We review the argument that latent image formation is a measurement in which the state vector collapses, requiring an enhanced noise parameter in objective reduction models. Tentative observation of a residual noise at this level, plus several experimental bounds, imply that the noise must be colored, and hence frame dependent and non-relativistic. Thus a relativistic objective reduction model, even if achievable in principle, would be incompatible with experiment; the best one can do is the non-relativistic CSL model. This (...)
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  34. The Introspective, Perceptual, and Spontaneous Response Models of Wang Yangming’s Philosophy.Philip J. Ivanhoe - 2022 - Journal of Confucian Philosophy and Culture 38:44-66.
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  35.  93
    On quantum jumps, events, and spontaneous localization models.A. Jadczyk - 1995 - Foundations of Physics 25 (5):743-762.
    We propose a precise meaning to the concepts of “experiment,” “measurement,” and “event” in the event-enhanced formalism of quantum theory. A minimal piecewise deterministic process is given that can be used for a computer simulation of real time series of experiments on single quantum objects. As an example a generalized cloud chamber is described, including the multiparticle case. Relation to the GRW spontaneous localization model is discussed.
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  36. Gravity, energy conservation, and parameter values in collapse models.Philip Pearle & Euan Squires - 1996 - Foundations of Physics 26 (3):291-305.
    We interpret the probability rule of the CSL collapse theory to mean to mean that the scalar field which causes collapse is the gravitational curvature scalar with two sources, the expectation value of the mass density (smeared over the GRW scale a) and a white noise fluctuating source. We examine two models of the fluctuating source, monopole fluctuations and dipole fluctuations, and show that these correspond to two well-known CSL models. We relate the two GRW parameters of CSL (...)
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  37.  30
    New Insights on the Quantum-Classical Division in Light of Collapse Models.Fernanda Torres, Sujoy K. Modak & Alfredo Aranda - 2023 - Foundations of Physics 53 (4):1-11.
    We argue, in light of Collapse Model interpretation of quantum theory, that the fundamental division between the quantum and classical behaviors might be analogous to the division of thermodynamic phases. A specific relationship between the collapse parameter (λ)(\lambda ) and the collapse length scale ( rCr_C ) plays the role of the coexistence curve in usual thermodynamic phase diagrams. We further claim that our functional relationship between λ\lambda and rCr_C is strongly supported by the existing International (...)
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  38. Symmetric versions of explicit wavefunction collapse models.Chris Dove & Evan J. Squires - 1995 - Foundations of Physics 25 (9):1267-1282.
    Two versions of the GRW “hitting” model for explicit wavefunction collapse, which are consistent with preserving the symmetry of the wavefunction, are considered. The predictions of the models for excitation of bound systems are calculated and compared with experiment and with the predictions of other similar models. It is shown that our preferred model strongly supports the idea that collapse, if it occurs, has gravitational origin.
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  39.  20
    The Idiot Patrick Bateman.Fabrizio Arcuri - 2024 - Contagion: Journal of Violence, Mimesis, and Culture 31 (1):177-201.
    In lieu of an abstract, here is a brief excerpt of the content:The Idiot Patrick BatemanA New Configuration of Caricatural "Ultra-Christianity"Fabrizio Arcuri (bio)INTRODUCTIONThis paper1 aims to analyze the figure of Patrick Bateman, the protagonist of the novel American Psycho,2 through René Girard's mimetic theory. It links the character created by Bret Easton Ellis to the concept of caricatural "ultra-Christianity," meaning the degeneration of Christian-based concern for innocent victims.Methodologically, it adopts the approach of the sociology of the imaginary, which is characterized (...)
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  40. Objects as Temporary Autonomous Zones.Tim Morton - 2011 - Continent 1 (3):149-155.
    continent. 1.3 (2011): 149-155. The world is teeming. Anything can happen. John Cage, “Silence” 1 Autonomy means that although something is part of something else, or related to it in some way, it has its own “law” or “tendency” (Greek, nomos ). In their book on life sciences, Medawar and Medawar state, “Organs and tissues…are composed of cells which…have a high measure of autonomy.”2 Autonomy also has ethical and political valences. De Grazia writes, “In Kant's enormously influential moral philosophy, autonomy (...)
     
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  41. Response to Ivanhoe, "The Introspective, Perceptual, and Spontaneous Response Models of Wang Yangming's Philosophy".Harvey Lederman - manuscript
    I respond to P. J. Ivanhoe's criticisms of my translation of a key passage in Wang Yangming.
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  42. 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 (...)
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  43.  79
    Collapse theories as beable theories.Guido Bacciagaluppi - 2010 - Manuscrito 33 (1):19-54.
    I discuss the interpretation of spontaneous collapse theories, with particular reference to Bell's suggestion that the stochastic jumps in the evolution of the wave function should be considered as local beables of the theory. I develop this analogy in some detail for the case of non-relativistic GRW-type theories, using a generalisation of Bell's notion of beables to POV measures. In the context of CSL-type theories, this strategy appears to fail, and I discuss instead Ghirardi and co-workers' mass-density interpretation (...)
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  44.  28
    Collapse of the Wave Function: Models, Ontology, Origin, and Implications.Shan Gao (ed.) - 2018 - New York, NY: Cambridge University Press.
    An overview of the collapse theories of quantum mechanics. Written by distinguished physicists and philosophers of physics, it discusses the origin and implications of wave-function collapse, the controversies around collapse models and their ontologies, and new arguments for the reality of wave function collapse.
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  45. Spontaneity and Contingency: Kant’s Two Models of Rational Self-Determination.Markus Kohl - 2020 - In Manja Kisner & Jörg Noller, The Concept of Will in Classical German Philosophy: Between Ethics, Politics, and Metaphysics. Boston: De Gruyter. pp. 29-48.
    I argue that Kant acknowledges two models of spontaneous self-determination that rational beings are capable of. The first model involves absolute unconditional necessity and excludes any form of contingency. The second model involves (albeit not as a matter of definition) a form of contingency which entails alternative possibilities for determining oneself. The first model would be exhibited by a divine being; the second model is exhibited by human beings. Human beings do, however, partake in the (...)
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  46. Spontaneous symmetry breaking in quantum systems: Emergence or reduction?Nicolaas P. Landsman - 2013 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 44 (4):379-394.
    Beginning with Anderson, spontaneous symmetry breaking in infinite quantum systems is often put forward as an example of emergence in physics, since in theory no finite system should display it. Even the correspondence between theory and reality is at stake here, since numerous real materials show ssb in their ground states, although they are finite. Thus against what is sometimes called ‘Earman's Principle’, a genuine physical effect seems theoretically recovered only in some idealisation, disappearing as soon as the idealisation (...)
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  47. Spontaneity and Contingency: Kant’s Two Models of Rational Self-Determination.Markus Kohl - 2020 - In Manja Kisner & Jörg Noller, The Concept of Will in Classical German Philosophy: Between Ethics, Politics, and Metaphysics. Boston: De Gruyter. pp. 29-48.
    I argue that Kant acknowledges two models of spontaneous self-determination that rational beings are capable of. The first model involves absolute unconditional necessity and excludes any form of contingency. The second model involves (albeit not as a matter of definition) a form of contingency which entails alternative possibilities for determining oneself. The first model would be exhibited by a divine being; the second model is exhibited by human beings. Human beings do, however, partake in the (...)
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  48. Consciousness and the Collapse of the Wave Function.David J. Chalmers & Kelvin J. McQueen - 2022 - In Shan Gao, Consciousness and Quantum Mechanics. Oxford University Press, Usa.
    Does consciousness collapse the quantum wave function? This idea was taken seriously by John von Neumann and Eugene Wigner but is now widely dismissed. We develop the idea by combining a mathematical theory of consciousness (integrated information theory) with an account of quantum collapse dynamics (continuous spontaneous localization). Simple versions of the theory are falsified by the quantum Zeno effect, but more complex versions remain compatible with empirical evidence. In principle, versions of the theory can be tested (...)
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  49.  38
    Partial collapses of the complexity hierarchy in models for fragments of bounded arithmetic.Zofia Adamowicz & Leszek Aleksander Kołodziejczyk - 2007 - Annals of Pure and Applied Logic 145 (1):91-95.
    For any n, we construct a model of in which each formula is equivalent to an formula.
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  50. Spontaneous Decisions and Free Will: Empirical Results and Philosophical Considerations.Joana Rigato, Masayoshi Murakami & Zachary Mainen - 2014 - Cold Spring Harbor Symposia on Quantitative Biology 79:177-184.
    Spontaneous actions are preceded by brain signals that may sometimes be detected hundreds of milliseconds in advance of a subject's conscious intention to act. These signals have been claimed to reflect prior unconscious decisions, raising doubts about the causal role of conscious will. Murakami et al. (2014. Nat Neurosci 17: 1574–1582) have recently argued for a different interpretation. During a task in which rats spontaneously decided when to abort waiting, the authors recorded neurons in the secondary motor cortex. The (...)
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