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Lucas Dunlap
University of Cincinnati
  1.  50
    The Metaphysics of D-CTCs: On the Underlying Assumptions of Deutsch׳s Quantum Solution to the Paradoxes of Time Travel.Lucas Dunlap - 2016 - Studies in the History and Philosophy of Modern Physics 56:39-47.
    I argue that Deutsch’s model for the behavior of systems traveling around closed timelike curves relies implicitly on a substantive metaphysical assumption. Deutsch is employing a version of quantum theory with a significantly supplemented ontology of parallel existent worlds, which differ in kind from the many worlds of the Everett interpretation. Standard Everett does not support the existence of multiple identical copies of the world, which the D-CTC model requires. This has been obscured because he often refers to the branching (...)
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  2.  77
    On the Common Structure of the Primitive Ontology Approach and the Information-Theoretic Interpretation of Quantum Theory.Lucas Dunlap - 2015 - Topoi 34 (2):359-367.
    We use the primitive ontology framework of Allori et al. to analyze the quantum information-theoretic interpretation of Bub and Pitowsky. There are interesting parallels between the two approaches, which differentiate them both from the more standard realist interpretations of quantum theory. Where they differ, however, is in terms of their commitments to an underlying ontology on which the manifest image of the world supervenes. Employing the primitive ontology framework in this way makes perspicuous the differences between the quantum information-theoretic interpretation, (...)
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    Do the EPR Correlations Pose a Problem for Causal Decision Theory?Adam Koberinski, Lucas Dunlap & William L. Harper - 2017 - Synthese:1-12.
    We argue that causal decision theory is no worse off than evidential decision theory in handling entanglement, regardless of one’s preferred interpretation of quantum mechanics. In recent works, Ahmed and Ahmed and Caulton : 4315–4352, 2014) have claimed the opposite; we argue that they are mistaken. Bell-type experiments are not instances of Newcomb problems, so CDT and EDT do not diverge in their recommendations. We highlight the fact that a Causal Decision Theorist should take all lawlike correlations into account, including (...)
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  4.  19
    Would the Existence of CTCs Allow for Nonlocal Signaling?Lucas Dunlap - 2017 - Erkenntnis:1-20.
    A recent paper from Brun et al. has argued that access to a closed timelike curve would allow for the possibility of perfectly distinguishing nonorthogonal quantum states. I show how this result can be used to develop a protocol for instantaneous nonlocal signaling, and detail the debate surround- ing these results. Several commenters have argued that nonlocal signaling must fail in this and in similar cases, for various reasons. I argue that each of these objections fails to rule out nonlocal (...)
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    Shakespeare's Free Lunch: A Critique of the D-CTC Solution to the Knowledge Paradox.Lucas Dunlap - unknown
    In this paper I argue that the consistency condition from the Deutsch's influential model for closed timelike curves differs significantly from the classical consistency condition found in Lewis and Novikov, as well as from the consistency condition found in the P-CTC model, the major rival to Deutsch's approach. Both the CCC and the P-CTC consistency condition are formulable in the context of a single history of the world. Deutsch's consistency condition relies on the existence of a structure of parallel worlds. (...)
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  6. Would the Existence of CTCs Allow for Nonlocal Signaling?Lucas Dunlap - 2019 - Erkenntnis 84 (1):215-234.
    A recent paper from Brun et al. has argued that access to a closed timelike curve would allow for the possibility of perfectly distinguishing nonorthogonal quantum states. This result can be used to develop a protocol for instantaneous nonlocal signaling. Several commenters have argued that nonlocal signaling must fail in this and in similar cases, often citing consistency with relativity as the justification. I argue that this objection fails to rule out nonlocal signaling in the presence of a CTC. I (...)
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