Stability of Pairwise Entanglement in a Decoherent Environment

Details Stability of Pairwise Entanglement in a Decoherent Environment Stability of Pairwise Entanglement in a Decoherent Environment

2005-07-04

arxiv.org/abs/quant-ph/0507021v2

Phys. Rev. A. 72, 022312 (2005).

Physics

Quantum Physics

accepted by Physical Review A, references updated and minor changes

Scientific paper

10.1103/PhysRevA.72.022312

Consider the dynamics of a two-qubit entangled system in the decoherence environment, we investigate the stability of pairwise entanglement under decoherence. We find that for different decoherence models, there exist some special class of entangled states of which the pairwise entanglement is the most stable. The lifetime of the entanglement in these states is larger than other states with the same initial entanglement. In addition, we also investigate the dynamics of pairwise entanglement in the ground state of spin models such as Heisenberg and XXY models.

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