17 found
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  1. On the status of conservation laws in physics: Implications for semiclassical gravity.Tim Maudlin, Elias Okon & Daniel Sudarsky - forthcoming - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics.
  2.  28
    Assessing relational quantum mechanics.Ricardo Muciño, Elias Okon & Daniel Sudarsky - 2022 - Synthese 200 (5):1-26.
    Relational Quantum Mechanics is an interpretation of quantum theory based on the idea of abolishing the notion of absolute states of systems, in favor of states of systems relative to other systems. Such a move is claimed to solve the conceptual problems of standard quantum mechanics. Moreover, RQM has been argued to account for all quantum correlations without invoking non-local effects and, in spite of embracing a fully relational stance, to successfully explain how different observers exchange information. In this work, (...)
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  3.  46
    On Superdeterministic Rejections of Settings Independence.Gerardo Sanjuán Ciepielewski, Elias Okon & Daniel Sudarsky - 2021 - British Journal for the Philosophy of Science 74 (2):435-467.
    Relying on some auxiliary assumptions, usually considered mild, Bell’s theorem proves that no local theory can reproduce all the predictions of quantum mechanics. In this work, we introduce a fully local, superdeterministic model that by explicitly violating ‘settings independence’—one of these auxiliary assumptions, requiring statistical independence between measurement settings and systems to be measured—is able to reproduce all the predictions of quantum mechanics. Moreover, we show that contrary to widespread expectations, our model can break settings independence without an initial state (...)
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  4. Less Decoherence and More Coherence in Quantum Gravity, Inflationary Cosmology and Elsewhere.Elias Okon & Daniel Sudarsky - 2016 - Foundations of Physics 46 (7):852-879.
    In Crull it is argued that, in order to confront outstanding problems in cosmology and quantum gravity, interpretational aspects of quantum theory can by bypassed because decoherence is able to resolve them. As a result, Crull concludes that our focus on conceptual and interpretational issues, while dealing with such matters in Okon and Sudarsky, is avoidable and even pernicious. Here we will defend our position by showing in detail why decoherence does not help in the resolution of foundational questions in (...)
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  5. On the Consistency of the Consistent Histories Approach to Quantum Mechanics.Elias Okon & Daniel Sudarsky - 2014 - Foundations of Physics 44 (1):19-33.
    The Consistent Histories (CH) formalism aims at a quantum mechanical framework which could be applied even to the universe as a whole. CH stresses the importance of histories for quantum mechanics, as opposed to measurements, and maintains that a satisfactory formulation of quantum mechanics allows one to assign probabilities to alternative histories of a quantum system. It further proposes that each realm, that is, each set of histories to which probabilities can be assigned, provides a valid quantum-mechanical account, but that (...)
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  6.  94
    Measurements according to Consistent Histories.Elias Okon & Daniel Sudarsky - 2014 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 48 (1):7-12.
    We critically evaluate the treatment of the notion of measurement in the Consistent Histories approach to quantum mechanics. We find such a treatment unsatisfactory because it relies, often implicitly, on elements external to those provided by the formalism. In particular, we note that, in order for the formalism to be informative when dealing with measurement scenarios, one needs to assume that the appropriate choice of framework is such that apparatuses are always in states of well defined pointer positions after measurements. (...)
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  7.  41
    The Consistent Histories formalism and the measurement problem.Elias Okon & Daniel Sudarsky - 2015 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 52 (Part B):217-222.
    In response to a recent rebuttal of Okon and Sudarsky presented in Griffiths, we defend the claim that the Consistent Histories formulation of quantum mechanics does not solve the measurement problem. In order to do so, we argue that satisfactory solutions to the problem must not only not contain anthropomorphic terms at the fundamental level, but also that applications of the formalism to concrete situations should not require any input not contained in the description of the situation at hand at (...)
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  8. 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 and (...)
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  9.  56
    Black Holes, Information Loss and the Measurement Problem.Elias Okon & Daniel Sudarsky - 2017 - Foundations of Physics 47 (1):120-131.
    The information loss paradox is often presented as an unavoidable consequence of well-established physics. However, in order for a genuine paradox to ensue, not-trivial assumptions about, e.g., quantum effects on spacetime, are necessary. In this work we will be explicit about these additional, speculative assumptions required. We will also sketch a map of the available routes to tackle the issue, highlighting the, often overlooked, commitments demanded of each alternative. Finally, we will display the strong link between black holes, the issue (...)
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  10.  34
    A novel explanation for the very special initial state of the universe.Elias Okon & Daniel Sudarsky - unknown
    We put forward a proposal that combines objective collapse models, developed in connection with quantum-foundational questions, with the so-called Weyl curvature hypothesis, introduced by Roger Penrose as an attempt to account for the very special initial state of the universe. In particular, we explain how a curvature dependence of the collapse rate in such models, an idea already shown to help in the context of black holes and information loss, could also offer a dynamical justification for Penrose's conjecture.
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  11.  28
    Losing Stuff Down a Black Hole.Elias Okon & Daniel Sudarsky - 2018 - Foundations of Physics 48 (4):411-428.
    Over the years, the so-called black hole information loss paradox has generated an amazingly diverse set of proposals. However, 40 years after the introduction of Hawking’s radiation, there continues to be a debate regarding whether the effect does, in fact, lead to an actual problem. In this paper we try to clarify some aspect of the discussion by describing two possible perspectives regarding the landscape of the information loss issue. Moreover, we advance a fairly conservative point of view regarding the (...)
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  12.  22
    The weight of collapse: dynamical reduction models in general relativistic contexts.Elias Okon & Daniel Sudarsky - unknown
    Inspired by possible connections between gravity and foundational question in quantum theory, we consider an approach for the adaptation of objective collapse models to a general relativistic context. We apply these ideas to a list of open problems in cosmology and quantum gravity, such as the emergence of seeds of cosmic structure, the black hole information issue, the problem of time in quantum gravity and, in a more speculative manner, to the nature of dark energy and the origin of the (...)
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  13.  22
    Can gravity account for the emergence of classicality?Yuri Bonder, Elias Okon & Daniel Sudarsky - 2015 - Physical Review D 92.
    A recent debate has ensued over the claim in Pikovski et al. that systems with internal degrees of freedom undergo a universal, gravity-induced, type of decoherence that explains their quantum-to-classical transition. Such decoherence is supposed to arise from the different gravitational redshifts experienced by such systems when placed in a superposition of two wave packets at different heights in a gravitational field. Here we investigate some aspects of the discussion with the aid of simple examples. In particular, we first resolve (...)
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  14.  18
    Extracting Geometry from Quantum Spacetime: Obstacles Down the Road.Yuri Bonder, Chryssomalis Chryssomalakos & Daniel Sudarsky - 2018 - Foundations of Physics 48 (9):1038-1060.
    Any acceptable quantum gravity theory must allow us to recover the classical spacetime in the appropriate limit. Moreover, the spacetime geometrical notions should be intrinsically tied to the behavior of the matter that probes them. We consider some difficulties that would be confronted in attempting such an enterprise. The problems we uncover seem to go beyond the technical level to the point of questioning the overall feasibility of the project. The main issue is related to the fact that, in the (...)
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  15.  60
    Interpretations of Quantum Theory in the Light of Modern Cosmology.Mario Castagnino, Sebastian Fortin, Roberto Laura & Daniel Sudarsky - 2017 - Foundations of Physics 47 (11):1387-1422.
    The difficult issues related to the interpretation of quantum mechanics and, in particular, the “measurement problem” are revisited using as motivation the process of generation of structure from quantum fluctuations in inflationary cosmology. The unessential mathematical complexity of the particular problem is bypassed, facilitating the discussion of the conceptual issues, by considering, within the paradigm set up by the cosmological problem, another problem where symmetry serves as a focal point: a simplified version of Mott’s problem.
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  16.  59
    On the Possibility of Measuring the Unruh Effect.Igor Peña & Daniel Sudarsky - 2014 - Foundations of Physics 44 (6):689-708.
    There is a persistent state of confusion regarding the nature of the Unruh effect. We will argue that, in contrast to some interpretations thereof, the effect does not represent any novel physics and that, by its very nature, the effect is fundamentally unmeasurable in all experiments of the kind that have been contemplated until now. Also, we discuss what aspects connected with this effect one might consider as possibilities to be explored empirically and what their precise meaning may be regarding (...)
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  17.  2
    Some Often Loosely Used Concepts with Potentially Problematic Implications.Daniel Sudarsky - 2024 - In Angelo Bassi, Sheldon Goldstein, Roderich Tumulka & Nino Zanghi (eds.), Physics and the Nature of Reality: Essays in Memory of Detlef Dürr. Springer. pp. 217-230.
    We point out some concepts that appear rather frequently in physics discussions, which, despite a seemingly innocent initial appearance, turn out to have important implicit implications that put into question the very assumption of their meaningfulness. The message of this essay is that, in order to avoid the ensuing confusions, their usage should be accompanied with clarifications that make them meaningful, and then to confront the often uncomfortable underlying assumptions required to do so. In particular, we will visit the notions (...)
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