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arXiv · 0810.2936

Manipulating sudden death of entanglement of two-qubit X-states in thermal reservoirs

Mazhar Ali·G. Alber·A. R. P. Rau
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Abstract

Manipulation of sudden death of entanglement (ESD) of two qubits interacting with statistically uncorrelated thermal reservoirs is investigated. It is shown that for initially prepared X-states of the two qubits a simple (necessary and sufficient) criterion for ESD can be derived with the help of the Peres-Horodecki criterion. This criterion implies that, in contrast to the zero-temperature case, at finite temperature of at least one of the reservoirs all initially prepared two-qubit X-states exhibit ESD. General conditions are derived under which ESD can be hastened, delayed, or averted.

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Mazhar Ali, G. Alber, A. R. P. Rau. 2008-10-22. Manipulating sudden death of entanglement of two-qubit X-states in thermal reservoirs. https://doi.org/10.1088/0953-4075/42/2/025501

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