1210.3216 (K. O. Yashodamma et al.)
K. O. Yashodamma, Sudha
It is shown that finite time disentanglement or entanglement sudden death can occur even when only one part of the composite entangled state is exposed to a noisy environment. The result is illustrated through the action of different noisy environments individually on a single qubit of the so-called X class of states. Composite noise on a part or whole of the entangled state is thus not found to be necessary for sudden death of entanglement.
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http://arxiv.org/abs/1210.3216
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