Thermal entanglement and teleportation in a three-qubit Heisenberg XXZ model with Dzyaloshinski--Moriya anisotropic antisymmetric interaction |
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| Authors: | Xie Li-Jun Zhang Deng-Yu Tang Shi-Qing Zhan Xiao-Gui and Gao Feng |
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| Affiliation: | Faculty of Material and Photoelectronic Physics, Xiangtan University, Xiangtan 411005, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China |
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| 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. |
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| Keywords: | quantum teleportation concurrence fidelity Bell inequality violation |
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