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Eugene Chua
California Institute of Technology
  1. Does von Neumann Entropy Correspond to Thermodynamic Entropy?Eugene Y. S. Chua - 2021 - Philosophy of Science 88 (1):145-168.
    Conventional wisdom holds that the von Neumann entropy corresponds to thermodynamic entropy, but Hemmo and Shenker (2006) have recently argued against this view by attacking von Neumann's (1955) argument. I argue that Hemmo and Shenker's arguments fail due to several misunderstandings: about statistical-mechanical and thermodynamic domains of applicability, about the nature of mixed states, and about the role of approximations in physics. As a result, their arguments fail in all cases: in the single-particle case, the finite particles case, and the (...)
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  2. Decoherence, Branching, and the Born Rule in a Mixed-State Everettian Multiverse.Eugene Y. S. Chua & Eddy Keming Chen - manuscript
    In Everettian quantum mechanics, justifications for the Born rule appeal to self-locating uncertainty or decision theory. Such justifications have focused exclusively on a pure-state Everettian multiverse, represented by a wave function. Recent works in quantum foundations suggest that it is viable to consider a mixed-state Everettian multiverse, represented by a (mixed-state) density matrix. Here, we develop the conceptual foundations for decoherence and branching in a mixed-state multiverse, and extend the standard Everettian justifications for the Born rule to this setting. This (...)
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    No Time for Time from No-Time.Eugene Y. S. Chua & Craig Callender - 2021 - Philosophy of Science 88 (5):1172-1184.
    Programs in quantum gravity often claim that time emerges from fundamentally timeless physics. In the semiclassical time program time arises only after approximations are taken. Here we ask what justifies taking these approximations and show that time seems to sneak in when answering this question. This raises the worry that the approach is either unjustified or circular in deriving time from no–time.
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  4. Degeneration and Entropy.Eugene Y. S. Chua - 2022 - Kriterion - Journal of Philosophy 36 (2):123-155.
    [Accepted for publication in Lakatos's Undone Work: The Practical Turn and the Division of Philosophy of Mathematics and Philosophy of Science, special issue of Kriterion: Journal of Philosophy. Edited by S. Nagler, H. Pilin, and D. Sarikaya.] Lakatos’s analysis of progress and degeneration in the Methodology of Scientific Research Programmes is well-known. Less known, however, are his thoughts on degeneration in Proofs and Refutations. I propose and motivate two new criteria for degeneration based on the discussion in Proofs and Refutations (...)
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    From classical to quantum, from physics to philosophy: Benjamin H. Feintzeig: The classical-quantum correspondence. Cambridge Elements in the philosophy of physics. Cambridge: Cambridge University Press, 2022, 97 pp, $22 PB. [REVIEW]Eugene Y. S. Chua - 2023 - Metascience 33 (1):65-68.