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Entanglement monogamy and entanglement evolution in multipartite systems

Source: Phys. Rev. A 80, 044301 (2009); doi:10.1103/PhysRevA.80.044301

Published 15 October 2009

KEYWORDS and PACS
Keywords
PACS
  • 03.67.Mn
    Entanglement measures, witnesses, and other characterizations (quantum information)
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • 03.65.Yz
    Decoherence; open systems; quantum statistical methods
  • YEAR: 2009
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PUBLICATION DATA
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Yan-Kui Bai,1,2 Ming-Yong Ye,1,3 and Z. D. Wang1
1Department of Physics and Center of Theoretical and Computational Physics, University of Hong Kong, Pokfulam Road, Hong Kong, China
2College of Physical Science and Information Engineering and Hebei Advance Thin Films Laboratory, Hebei Normal University, Shijiazhuang, Hebei 050016, China
3School of Physics and Optoelectronics Technology, Fujian Normal University, Fuzhou 350007, China
We analyze the entanglement distribution and the two-qubit residual entanglement in multipartite systems. For a composite system consisting of two cavities interacting with independent reservoirs, it is revealed that the entanglement evolution is restricted by an entanglement monogamy relation derived here. Moreover, it is found that the initial cavity-cavity entanglement evolves completely to the genuine four-partite cavities-reservoirs entanglement in the time interval between the sudden death of cavity-cavity entanglement and the birth of reservoir-reservoir entanglement. In addition, we also address the relationship between the genuine block-block entanglement form and qubit-block form in the interval. ©2009 The American Physical Society
History: Received 4 June 2009; published 15 October 2009
Permalink: http://link.aps.org/abstract/PRA/v80/e044301

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