Quantum state transfer in XX spin chain with phase shift control

Abstract

Abstract: The effect of phase shift generated by Aharonov-Casher interaction on the quantum state transfer in a XX spin chain is investigated. The concurrence of the channel and the fidelity of the state are calculated by numerical simulations. It is found that by controlling the phase shift, decoherence is suppressed, and the entanglement and fidelity can be enhanced. In addition, the relative positions between the sender and the receiver have an influence on the entanglement and fidelity. When they are located at diametrically opposite sites in an even spin ring respectively, the maximum values of entanglement and fidelity can be obtained.

Key words: quantum optics, quantum state transfer, phase shift control, entanglement, fidelity, spin chain

CLC Number:

O431.2

ZHANG Zhong-jun, SHI Peng, LI Wen-dong, GU Yong-jian. Quantum state transfer in XX spin chain with phase shift control[J]. J4, 2013, 30(6): 731-737.

References

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