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Weekly Papers on Quantum Foundations (29)

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The Relativity Principle at the Foundation of Quantum Mechanics. (arXiv:2107.06942v1 [quant-ph]) 下午5:48 | W.M. Stuckey, Timothy McDevitt, Michael Silberstein | quant-ph updates on arXiv.org Quantum information theorists have created axiomatic reconstructions of quantum mechanics (QM) that are very successful at identifying precisely what distinguishes quantum probability theory from classical and more general probability theories in terms of information-theoretic principles. Herein,… Read more →

Weekly Papers on Quantum Foundations (28)

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Is the problem of molecular structure just the quantum measurement problem? Foundations of Chemistry (2021) Sebastian Fortin & Olimpia Lombardi Abstract In a recent article entitled “The problem of molecular structure just is the measurement problem”, Alexander Franklin and Vanessa Seifert argue that insofar as the quantum measurement problem is solved, the problems of molecular structure are resolved as well…. Read more →

Weekly Papers on Quantum Foundations (27)

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Self-testing of physical theories, or, is quantum theory optimal with respect to some information-processing task?. (arXiv:2003.00349v3 [quant-ph] UPDATED) 上午9:18 | Mirjam Weilenmann, Roger Colbeck | quant-ph updates on arXiv.org Self-testing usually refers to the task of taking a given set of observed correlations that are assumed to arise via a process that is accurately described by quantum theory, and trying… Read more →

Weekly Papers on Quantum Foundations (26)

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R\’enyi entropy of magic. (arXiv:2106.12587v1 [quant-ph]) 上午9:37 | Lorenzo Leone, Salvatore F. E. Oliviero, Alioscia Hamma | quant-ph updates on arXiv.org We introduce a novel measure for the quantum property commonly known as $magic$ by considering the R\’enyi entropy of the probability distribution associated to a pure quantum state given by the square of the expectation value of Pauli strings… Read more →

Weekly Papers on Quantum Foundations (25)

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On Causal State Updates in Quantum Field Theory. (arXiv:2106.09027v1 [quant-ph]) 上午10:21 | I. Jubb | quant-ph updates on arXiv.org In relativistic Quantum Field Theory (QFT) ideal measurements of certain observables are physically impossible without violating causality. This prompts two questions: i) can a given observable be ideally measured in QFT, and ii) if not, in what sense can it be… Read more →

Weekly Papers on Quantum Foundations (24)

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Testing quantum theory with thought experiments. (arXiv:2106.05314v1 [quant-ph]) 上午9:49 | Nuriya Nurgalieva, Renato Renner | quant-ph updates on arXiv.org Quantum mechanics is one of our most successful physical theories; its predictions agree with experimental observations to an extremely high accuracy. However, the bare formalism of quantum theory does not provide straightforward answers to seemingly simple questions: for example, how should… Read more →

Weekly Papers on Quantum Foundations (22)

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Faking quantum probabilites: Beyond Bell’s theorem and Tsirelson bounds. (arXiv:2105.12728v1 [quant-ph]) 上午8:50 | Marek Czachor, Kamil Nalikowski | quant-ph updates on arXiv.org Local hidden-variable model of singlet-state correlations discussed in M. Czachor, Arithmetic loophole in Bell’s Theorem: Overlooked threat to entangled-state quantum cryptography”, Acta Phys. Polon. A 139, 70-83 (2021), is shown to be a particular case of an infinite… Read more →

Weekly Papers on Quantum Foundations (21)

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Quantum imprints of gravitational shockwaves. (arXiv:2105.09337v1 [hep-th]) 上午10:02 | Finnian Gray, David Kubiznak, Taillte May, Sydney Timmerman, Erickson Tjoa | quant-ph updates on arXiv.org Gravitational shockwaves are simple exact solutions of Einstein equations representing the fields of ultrarelativistic sources and idealized gravitational waves (shocks). Historically, much work has focused on shockwaves in the context of possible black hole formation in… Read more →

Weekly Papers on Quantum Foundations (20)

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Blind steering in no-signalling theories. (arXiv:2007.15502v3 [quant-ph] UPDATED) 上午9:44 | Emmanuel Zambrini Cruzeiro, Nicolas Gisin, Sandu Popescu | quant-ph updates on arXiv.org Steering is usually described as a quantum phenomenon. In this article, we show that steering is not restricted to quantum theory, it is also present in more general, no-signalling theories. We present two main results: first, we show… Read more →

Weekly Papers on Quantum Foundations (19)

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Page-Wootters formulation of indefinite causal order. (arXiv:2105.02304v1 [quant-ph]) 上午9:33 | Veronika Baumann, Marius Krumm, Philippe Allard Guérin, Časlav Brukner | quant-ph updates on arXiv.org One of the most fundamental open problems in physics is the unification of general relativity and quantum theory to a theory of quantum gravity. An aspect that might become relevant in such a theory is that… Read more →

Weekly Papers on Quantum Foundations (18)

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A local hidden-variable model for experimental tests of the GHZ puzzle. (arXiv:2104.14503v1 [quant-ph]) 上午10:02 | Brian R. La Cour | quant-ph updates on arXiv.org The Greenberger-Horne-Zeilinger (GHZ) puzzle has been used to study quantum nonlocality and provide an all-or-nothing, no-go theorem for local hidden-variable models. Recent experiments using coincident-detected entangled photons prepared in a three-particle GHZ state have been used… Read more →