Residual entanglement and sudden death: A direct connection

Details Residual entanglement and sudden death: A direct connection Residual entanglement and sudden death: A direct connection

2010-06-25

arxiv.org/abs/1006.5054v2

Physics

Quantum Physics

8 pages, 6 figures, to appear in PLA, DOI information: 10.1016/j.physleta.2011.10.020

Scientific paper

10.1016/j.physleta.2011.10.020

We explore the results of [V. Coffman, et al., Phys. Rev. A 61 (2000) 052306] derived for general tripartite states in a dynamical context. We study a class of physically motivated tripartite systems. We show that whenever entanglement sudden death occurs in one of the partitions residual entanglement will appear. For fourpartite systems however, the appearance of residual entanglement is not conditioned by sudden death of entanglement. We can only say that if sudden death of entanglement occurs in some partition there will certainly be residual entanglement.

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