Bipartite entanglement of a two-qubit system with anisotropic couplings under nonuniform magnetic fields |
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| Authors: | Qin Meng and Tian Dong-Ping |
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| Affiliation: | Institute of Science, PLA University of Science
and
Technology, NanJing 211101, China; Xi'an Institute of Post and Telecommunications, Xi'an
710061, China |
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| Abstract: | This paper investigates bipartite entanglement of a two-qubit system
with anisotropic couplings under an inhomogeneous magnetic field.
This work is mainly to investigate the characteristics of a
Heisenberg XYZ chain and obtains some meaningful results. By the
concept of negativity, it finds that the inhomogeneity of magnetic
field may induce entanglement and the critical magnetic field is
independent of Jz. The inhomogeneous magnetic field can
increase the value of critical magnetic field Bc. It also finds
that the magnetic field not only suppresses the entanglement but
also can induce it to revival for some time. |
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| Keywords: | Heisenberg XYZ chain bipartite
entanglement negativity |
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