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

QIN Meng; TIAN Dong-Ping

doi:10.1088/1674-1137/33/4/002

Chinese Physics C> 2009, Vol. 33> Issue(4) : 249-251 DOI: 10.1088/1674-1137/33/4/002

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

QIN Meng ^, ,
TIAN Dong-Ping

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Abstract：
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 J_z. We also find that the entanglement is symmetric with respect to a zero magnetic field. The anisotropy parameter J_z may enhance the entanglement.

References

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QIN Meng and TIAN Dong-Ping. Bipartite entanglement in a two-qubit Heisenberg XXZ chain under aninhomogeneous magnetic field[J]. Chinese Physics C, 2009, 33(4): 249-251. doi: 10.1088/1674-1137/33/4/002

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Received: 2008-07-28
Revised: 2008-09-12

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: QIN Meng,

Received Date: 2008-07-28

Accepted Date: 2008-09-12

Available Online: 2009-04-05

Abstract:

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 J_z. We also find that the entanglement is symmetric with respect to a zero magnetic field. The anisotropy parameter J_z may enhance the entanglement.

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

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