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Phys. Rev. A 74, 052105 (2006) [5 pages]

Entanglement control in an anisotropic two-qubit Heisenberg XYZ model with external magnetic fields

Ahmad Abliz,1,2 H. J. Gao,1 X. C. Xie,1,3 Y. S. Wu,4 and W. M. Liu1
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
2School of Mathematics, Physics and Informatics, Xinjiang Normal University, Urumchi 830054, China
3Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078
4Department of Physics, University of Utah, Salt Lake City, Utah 84112

Received 5 July 2006; published 8 November 2006

We study the bipartite entanglement dynamics in an anisotropic two-qubit Heisenberg XYZ model under the influence of population relaxation and in the presence of various types of magnetic fields. We find that the maximal value of the concurrence has an intrinsic rigidity for the different external magnetic fields. Moreover, our results demonstrate that it is possible to produce entangled states and to control or to modulate the concurrence within the intrinsic maximal value with the help of external time-varying fields despite the existence of dissipation.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.74.052105
DOI: 10.1103/PhysRevA.74.052105
PACS: 03.65.Yz; 03.67.Mn; 42.50.Lc; 75.10.Jm
  • 03.65.Yz
    Decoherence; open systems; quantum statistical methods
  • 03.67.Mn
    Quantum entanglement production, characterization, and manipulation
  • 42.50.Lc
    Quantum fluctuations, quantum noise, and quantum jumps (quantum optics)
  • 75.10.Jm
    Quantized spin models (magnetism)
  • YEAR: 2006
KEYWORDS: quantum entanglement, quantum computing, Heisenberg model

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