Phys. Rev. A 77, 022320 (2008) [8 pages]Non-Markovian disentanglement dynamics of a two-qubit systemReceived 9 October 2007; published 14 February 2008 We investigate the disentanglement dynamics of a two-qubit system in the non-Markovian approach. It is shown that only for weak coupling between the system and environment does an exponential decay of entanglement appear, for certain classes of two-qubit entangled states. When the coupling between qubit and the environment becomes stronger, entanglement sudden death always appears even if the dissipation environment is at zero temperature. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.77.022320
DOI:
10.1103/PhysRevA.77.022320
PACS:
03.67.Mn
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