APS » PROLA » Phys. Rev. A » Volume 72 » Issue 2
< Previous article | Next article >

Phys. Rev. A 72, 022312 (2005) [6 pages]

Stability of pairwise entanglement in a decoherent environment

Download: PDF (164 kB) or Buy this Article (Use Article Pack) Export: BibTeX or EndNote (RIS)

Jian-Ming Cai *, Zheng-Wei Zhou †, and Guang-Can Guo
Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China

Received 14 December 2004; revised 9 May 2005; published 12 August 2005

Considering 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 exists 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.


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.72.022312
DOI: 10.1103/PhysRevA.72.022312
PACS: 03.67.Pp, 03.65.Ud, 03.65.Yz, 03.67.Mn

* Electronic address: jmcai@mail.ustc.edu.cn
† Electronic address: zwzhou@ustc.edu.cn

[ Abstract  |  Previous article  |  Next article  |  Issue 2 ]