a Faculty of Material and Photoelectronic Physics, Xiangtan University, Xiangtan 411005, China; b Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China
Abstract This paper investigates the thermal pairwise entanglement of a three-qubit Heisenberg XXZ chain in the presence of the Dzyaloshinski--Moriya (DM) anisotropic antisymmetric interaction and quantum teleportation when using the Heisenberg chain as a channel. The entanglement dependences on the DM interaction and temperature are given in detail. It obtains the relation between the concurrence and average fidelity, and shows that the same concurrence can lead different average fidelities. Moreover, it finds the thermally entangled states which do not violate the Bell inequalities, and can still be used for quantum teleportation.
Received: 27 October 2008
Revised: 23 December 2008
Accepted manuscript online:
(Quantized spin models, including quantum spin frustration)
Fund: Project supported by the Natural
Science Foundation of Hunan Province (Grant No 06JJ50118), the
National Natural Science Foundation of China (Grant Nos 10604053 and
10874013).
Cite this article:
Xie Li-Jun(谢利军), Zhang Deng-Yu(张登玉), Tang Shi-Qing(唐世清), Zhan Xiao-Gui(詹孝贵), and Gao Feng(高峰) Thermal entanglement and teleportation in a three-qubit Heisenberg XXZ model with Dzyaloshinski--Moriya anisotropic antisymmetric interaction 2009 Chin. Phys. B 18 3203
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