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Bipartite entanglement in a two-qubit Heisenberg XXZ chain under an inhomogeneous magnetic field

Bipartite entanglement in a two-qubit Heisenberg XXZ chain under an inhomogeneous magnetic field
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摘要 This paper investigates the bipartite entanglement of a two-qubit Heisenberg XXZ chain under an inhomogeneous magnetic field. By the concept of negativity, we find that the inhomogeneity of the magnetic field may induce entanglement and the critical magnetic field is independent of Jz. We also find that the entanglement is symmetric with respect to a zero magnetic field. The anisotropy parameter Jz may enhance the entanglement. This paper investigates the bipartite entanglement of a two-qubit Heisenberg XXZ chain under an inhomogeneous magnetic field. By the concept of negativity, we find that the inhomogeneity of the magnetic field may induce entanglement and the critical magnetic field is independent of Jz. We also find that the entanglement is symmetric with respect to a zero magnetic field. The anisotropy parameter Jz may enhance the entanglement.
作者 秦猛 田东平
出处 《Chinese Physics C》 SCIE CAS CSCD 2009年第4期249-251,共3页 中国物理C(英文版)
关键词 bipartite entanglement NEGATIVITY Heisenberg XXZ chain bipartite entanglement, negativity, Heisenberg XXZ chain
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