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   Articles with "bell inequalities" as a keyword



Bell inequalities for $$S_4$$S4 group: classical and quantum bounds for two-orbit case

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recommendations! Published in 2020 at "Quantum Information Processing"

DOI: 10.1007/s11128-019-2557-2

Abstract: AbstractWithin Güney–Hillery approach, a number of examples of classical and quantum bounds on the sum of probabilities resulting from two orbits of $$S_4$$S4 is considered. It is shown that the violation of Bell’s inequalities is… read more here.

Keywords: quantum; bell inequalities; quantum bounds; inequalities group ... See more keywords

Simulating Bell inequalities with Qibo

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recommendations! Published in 2024 at "European Journal of Physics"

DOI: 10.1088/1361-6404/adcd13

Abstract: We present educational material about Bell inequalities in the context of quantum computing. In particular, we provide software tools to simulate their violation, together with a guide for classroom discussion. The material is organized in… read more here.

Keywords: inequalities qibo; simulating bell; bell inequalities; bell ... See more keywords

A versatile construction of Bell inequalities for the multipartite scenario

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recommendations! Published in 2019 at "New Journal of Physics"

DOI: 10.1088/1367-2630/aaff2d

Abstract: Local measurements acting on entangled quantum states give rise to a rich correlation structure in the multipartite scenario. We introduce a versatile technique to build families of Bell inequalities witnessing different notions of multipartite nonlocality… read more here.

Keywords: multipartite scenario; seed; genuine multipartite; bell inequalities ... See more keywords

Bell inequalities tailored to the Greenberger–Horne–Zeilinger states of arbitrary local dimension

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recommendations! Published in 2019 at "New Journal of Physics"

DOI: 10.1088/1367-2630/ab4d9f

Abstract: In device-independent quantum information processing Bell inequalities are not only used as detectors of nonlocality, but also as certificates of relevant quantum properties. In order for these certificates to work, one very often needs Bell… read more here.

Keywords: maximally violated; dimension; bell inequalities; horne zeilinger ... See more keywords
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Violation of Bell inequalities by stochastic simulations of Gaussian States based on their positive Wigner representation

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recommendations! Published in 2021 at "Physica Scripta"

DOI: 10.1088/1402-4896/abdd56

Abstract: At first sight, the use of an everywhere positive Wigner function as a probability density to perform stochastic simulations in quantum optics seems equivalent to the introduction of local hidden variables, thus preventing any violation… read more here.

Keywords: stochastic simulations; positive wigner; bell inequalities; violation bell ... See more keywords

Bell inequalities from no-signaling distributions

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recommendations! Published in 2019 at "Physical Review A"

DOI: 10.1103/physreva.100.022114

Abstract: A Bell inequality is a constraint on a set of correlations whose violation can be used to certify non-locality. They are instrumental for device-independent tasks such as key distribution or randomness expansion. In this work… read more here.

Keywords: classes scenario; bell inequalities; scenario; inequalities signaling ... See more keywords
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Finding optimal Bell inequalities using the cone-projection technique

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recommendations! Published in 2021 at "Physical Review A"

DOI: 10.1103/physreva.104.012206

Abstract: Bell inequalities are relevant for many problems in quantum information science, but finding them for many particles is computationally hard. Recently, a computationally feasible method called coneprojection technique has been developed to find all optimal… read more here.

Keywords: inequality; bell inequalities; optimal bell; finding optimal ... See more keywords

Effects of topological boundary conditions on Bell nonlocality

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recommendations! Published in 2024 at "Physical Review A"

DOI: 10.1103/physreva.110.032201

Abstract: Bell nonlocality is the resource that enables device-independent quantum information processing tasks. It is revealed through the violation of so-called Bell inequalities, indicating that the observed correlations cannot be reproduced by any local hidden variable… read more here.

Keywords: bell nonlocality; effects topological; bell inequalities; bell ... See more keywords

Refined Tsirelson bounds on multipartite Bell inequalities

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recommendations! Published in 2024 at "Physical Review A"

DOI: 10.1103/physreva.110.032435

Abstract: Despite their importance, there is an on-going challenge characterizing multipartite quantum correlations. The Svetlichny and Mermin-Klyshko (MK) inequalities present constraints on correlations in multipartite systems, a violation of which allows to classify the correlations by… read more here.

Keywords: bounds multipartite; refined tsirelson; bell inequalities; tsirelson bounds ... See more keywords

Bounding conditional entropy of bipartite states with Bell operators

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recommendations! Published in 2024 at "Physical Review A"

DOI: 10.1103/physreva.110.052429

Abstract: Quantum information theory explores numerous properties that surpass classical paradigms, offering novel applications and benefits. Among these properties, negative conditional von Neumann entropy (CVNE) is particularly significant in entangled quantum systems, serving as an indicator… read more here.

Keywords: conditional entropy; bounding conditional; bell inequalities; bell operators ... See more keywords

Phase-space analysis of Bell inequalities for mixed Gaussian states

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recommendations! Published in 2025 at "Physical Review A"

DOI: 10.1103/physreva.111.042405

Abstract: We present a phase space formalism to evaluate Bell inequality violations in continuous variable systems. By doing so we can generalize previous analyses (which have dealt only with pure states) to arbitrary mixed states. We… read more here.

Keywords: space analysis; phase space; bell inequalities; analysis bell ... See more keywords