Optimized contextuality for two qubits

Generalizing the ideas of Peres [1], we investigate a measure for the contextuality of a two-qubit state and derive an analytic expression applicable to the most general mixed state. Further, we investigate the relationships contextuality has with quantum entanglement and quantum discord. •Derivatio...

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Bibliographic Details
Published in:Physics letters. A 2025-01, Vol.531, p.130148, Article 130148
Main Authors: Al-Qasimi, Asma, James, Daniel F.V.
Format: Article
Language:English
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Summary:Generalizing the ideas of Peres [1], we investigate a measure for the contextuality of a two-qubit state and derive an analytic expression applicable to the most general mixed state. Further, we investigate the relationships contextuality has with quantum entanglement and quantum discord. •Derivation of a measure of contextuality for two qubits.•Discord and contextuality are intimately related to each other.•Non-contextual states are non-Discordant.
ISSN:0375-9601
DOI:10.1016/j.physleta.2024.130148