Enhanced the thermal Entanglement in Anisotropy XYZ Heisenberg Chain

L. Zhou; H. S. Song; Y. Q. Guo

doi:10.1103/PhysRevA.68.024301

Enhanced the thermal Entanglement in Anisotropy XYZ Heisenberg Chain

Quantum Physics 2009-11-10 v3

Authors: L. Zhou , H. S. Song , Y. Q. Guo

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Abstract

The thermal entanglement in Heisenberg $XYZ$ chain is investigated in the presence of external magnetic field $B$ . In the two-qubit system, the critical magnetic field $B_c$ is increased because of introducing the interaction of the z-component of two neighboring spins $J_z$ . This interaction not only improves the critical temperature $T_c,$ but also enhances the entanglement for particular fixed $B$ . We also analyze the pairwise entanglement between nearest neighbors in three qubits. The pairwise entanglement, for a fixed $T$ , can be strong by controlling $B$ and $J_z$ . PACS: 03.65. Ud, 03.67. -a, 75.10. Jm

Keywords

thermal entanglement Heisenberg XYZ chain external magnetic field critical temperature pairwise entanglement two-qubit system

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@article{arxiv.quant-ph/0302094,
  title  = {Enhanced the thermal Entanglement in Anisotropy XYZ Heisenberg Chain},
  author = {L. Zhou and H. S. Song and Y. Q. Guo},
  journal= {arXiv preprint arXiv:quant-ph/0302094},
  year   = {2009}
}

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4 pages 6 figures. To appear in Phys. Rev. A

Enhanced the thermal Entanglement in Anisotropy XYZ Heisenberg Chain

Abstract

Keywords

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