Do all states undergo sudden death of entanglement at finite temperature?

Details Do all states undergo sudden death of entanglement at finite temperature? Do all states undergo sudden death of entanglement at finite temperature?

2007-07-17

arxiv.org/abs/0707.2611v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

In this paper we consider the decay of quantum entanglement, quantified by the concurrence, of a pair of two-level systems each of which is interacting with a reservoir at finite temperature T. For a broad class of initially entangled states, we demonstrate that the system always becomes disentangled in a finite time i.e."entanglement sudden death" (ESD) occurs. This class includes all states which previously had been found to have long-lived entanglement in zero temperature reservoirs. Our general result is illustrated by an example.

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