Results 1 to 10 of about 3,955 (98)
Characterization of Noncontextuality in the Framework of Generalized Probabilistic Theories
PRX Quantum, 2021 To make precise the sense in which the operational predictions of quantum theory conflict with a classical worldview, it is necessary to articulate a notion of classicality within an operational framework.
David Schmid +4 more
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Structure of Optimal State Discrimination in Generalized Probabilistic Theories
Entropy, 2016 We consider optimal state discrimination in a general convex operational framework, so-called generalized probabilistic theories (GPTs), and present a general method of optimal discrimination by applying the complementarity problem from convex ...
Joonwoo Bae +2 more
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PRX Quantum, 2021 Many experiments in the field of quantum foundations seek to adjudicate between quantum theory and speculative alternatives to it. This requires one to analyze the experimental data in a manner that does not presume the correctness of the quantum ...
Michael D. Mazurek +3 more
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A framework for phase and interference in generalized probabilistic theories
New Journal of Physics, 2013 Phase plays a crucial role in many quantum effects including interference. Here we lay the foundations for the study of phase in probabilistic theories more generally.
Andrew J P Garner +4 more
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Physical Review Research, 2020 Coin flipping is a fundamental cryptographic task where spatially separated Alice and Bob wish to generate a fair coin flip over a communication channel. It is known that ideal coin flipping is impossible in both classical and quantum theory.
Jamie Sikora, John H. Selby
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A review and reformulation of macroscopic realism: resolving its deficiencies using the framework of generalized probabilistic theories [PDF]
QuantumThe notion of macrorealism was introduced by Leggett and Garg in an attempt to capture our intuitive conception of the macroscopic world, which seems difficult to reconcile with our knowledge of quantum physics.
David Schmid
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Shadows and subsystems of generalized probabilistic theories: when tomographic incompleteness is not a loophole for contextuality proofs [PDF]
QuantumIt is commonly believed that failures of tomographic completeness undermine assessments of nonclassicality in noncontextuality experiments. In this work, we study how such failures can indeed lead to mistaken assessments of nonclassicality.
David Schmid +4 more
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Generalized Probabilities in Statistical Theories
Quantum Reports, 2021 We discuss different formal frameworks for the description of generalized probabilities in statistical theories. We analyze the particular cases of probabilities appearing in classical and quantum mechanics and the approach to generalized probabilities ...
Federico Holik +3 more
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Solvable Criterion for the Contextuality of any Prepare-and-Measure Scenario [PDF]
Quantum, 2022 Starting from arbitrary sets of quantum states and measurements, referred to as the prepare-and-measure scenario, an operationally noncontextual ontological model of the quantum statistics associated with the prepare-and-measure scenario is constructed ...
Victor Gitton, Mischa P. Woods
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Non-locality in theories without the no-restriction hypothesis [PDF]
Electronic Proceedings in Theoretical Computer Science, 2014 The framework of generalized probabilistic theories (GPT) is a widely-used approach for studying the physical foundations of quantum theory. The standard GPT framework assumes the no-restriction hypothesis, in which the state space of a physical theory ...
Peter Janotta, Raymond Lal
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