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Experimental criteria for steering and the Einstein-Podolsky-Rosen paradox
We formally link the concept of steering (a concept created by Schrodinger but only recently formalized by Wiseman, Jones and Doherty Phys. Rev. Lett. 98 140402 (2007)]) and the criteria for…
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Colloquium: The Einstein-Podolsky-Rosen paradox: From concepts to applications
This Colloquium examines the field of the Einstein, Podolsky, and Rosen (EPR) gedanken experiment, from the original paper of Einstein, Podolsky, and Rosen, through to modern theoretical proposals of…
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No ψ-epistemic model can fully explain the indistinguishability of quantum states.
TLDR
This work considers models that are defined for a single quantum system of dimension d, such that the independence condition does not arise, and derives an upper bound on the extent to which the probability distributions can overlap.
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One-sided device-independent quantum key distribution: Security, feasibility, and the connection with steering
TLDR
It is shown that the requirements for obtaining secure keys are much easier to meet than for DI-QKD, which opens promising experimental opportunities and clarifies the link between the security of this one-sided DI- QKD scenario and the demonstration of quantum steering, in analogy to the links between DI-ZKD and the violation of Bell inequalities.
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A strong no-go theorem on the Wigner’s friend paradox
Does quantum theory apply at all scales, including that of observers? New light on this fundamental question has recently been shed through a resurgence of interest in the long-standing Wigner’s…
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Quantum Paradoxes
There are several occasions when this word ‘paradox’ invariably appears in this work on the thesis. ‘Para’ for our purpose may be taken as ‘beyond’ or ‘apart from’. Further ‘doxa’ in Greek means…
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Analog of the Clauser-Horne-Shimony-Holt inequality for steering
The Clauser–Horne–Shimony–Holt (CHSH) inequality and its permutations are necessary and sufficient criteria for Bell nonlocality in the simplest Bell-nonlocality scenario: two parties, two…
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Unified criteria for multipartite quantum nonlocality
Wiseman and co-workers [H. M. Wiseman, S. J. Jones, and A. C. Doherty, Phys. Rev. Lett. 98, 140402, (2007)] proposed a distinction among the nonlocality classes of Bell's nonlocality,…
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On modifications of Reichenbachʼs principle of common cause in light of Bellʼs theorem
Bellʼs 1964 theorem causes a severe problem for the notion that correlations require explanation, encapsulated in Reichenbachʼs principle of common cause. Despite being a hallmark of scientific…
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Classical Causal Models for Bell and Kochen-Specker Inequality Violations Require Fine-Tuning
Nonlocality and contextuality are at the root of conceptual puzzles in quantum mechanics, and are key resources for quantum advantage in information-processing tasks. Bell nonlocality is best…
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