Extremal points of the quantum set in the Clauser-Horne-Shimony-Holt scenario: Conjectured analytical solution

Article Physics, Multidisciplinary

Quantum Correlations in the Minimal Scenario

Thinh P. Le et al.

Quantum (2023)

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Article Physics, Multidisciplinary

Quantum correlations on the no-signaling boundary: self-testing and more

Kai-Siang Chen et al.

Quantum (2023)

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Article Optics

Self-testing quantum states via nonmaximal violation in Hardy's test of nonlocality

Ashutosh Rai et al.

Summary: This study develops self-testing protocols based on observing nonlocal correlations in quantum devices, and demonstrates that non-maximal nonlocal behaviors can also serve the purpose of self-testing quantum states. The method provides an alternative self-testing protocol and a powerful tool for characterizing the complex boundary of the set of quantum correlations.

PHYSICAL REVIEW A (2022)

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Article Optics

Geometric interpretation of the Clauser-Horne-Shimony-Holt inequality of nonmaximally entangled states

Johannes Seiler et al.

Summary: The study reveals that maximizing the correlation measure in the Clauser-Horne-Shimony-Holt inequality for pure and mixed states can be simplified to maximizing the perimeter of a parallelogram enclosed by an ellipse characterized by the entanglement in the bipartite system. This geometrical description is applicable to nonmaximally entangled states, and the corresponding optimal measurements have been identified.

PHYSICAL REVIEW A (2021)

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Article Optics

Device-independent bounds from Cabello's nonlocality argument

Ashutosh Rai et al.

Summary: The passage discusses Hardy-type arguments and Cabello's nonlocality argument, demonstrating that the maximum quantum value for both can be achieved through a pure two-qubit state and unique projective measurements. Moreover, it explores the properties of a more realistic scenario with small errors in constraints, showing that the same two-qubit state and measurements can still yield the maximum quantum violation of the classical bound.

PHYSICAL REVIEW A (2021)

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Article Physics, Multidisciplinary