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Journal of Optics

Rank dependence of entanglement sudden death of a two-qubit system in a thermal reservoir

C. V. Namitha, K. G. Paulson, S. V. M. Satyanarayana

Published Nov 12, 2019• 0 citations
Publisher
DOI
10.1007/s12596-019-00563-9

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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.