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Quantum properties and dynamics of X states

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arxiv 1207.3689 v1 pith:OKK32QIE submitted 2012-07-16 quant-ph

Nicolás Quesada , Asma Al-Qasimi , Daniel F. V. James This is my paper · ORCID
classification quant-ph
keywords quantumstatespropertiesaccountbroadclasscomprehensivecontinuous
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X states are a broad class of two-qubit density matrices that generalize many states of interest in the literature. In this work, we give a comprehensive account of various quantum properties of these states, such as entanglement, negativity, quantum discord and other related quantities. Moreover, we discuss the transformations that preserve their structure both in terms of continuous time evolution and discrete quantum processes.

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  1. Local-available quantum correlation swapping in one-parameter X states

    quant-ph 2025-07 reject novelty 5.0 of 10

    LAQC can be redistributed by projective swapping in X states, but the paper's key examples claiming separable final states with nonzero LAQC are only valid for part of the parameter space.

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