Improving quantum state transfer in a general XY chain via the Dzyaloshinsky–Moriya interaction

doi:10.1088/1674-1056/20/10/100307

中国物理B ›› 2011, Vol. 20 ›› Issue (10): 100307-100307.doi: 10.1088/1674-1056/20/10/100307

Improving quantum state transfer in a general XY chain via the Dzyaloshinsky–Moriya interaction

张剑¹, 李前树², 邵彬³, 邹健³

(1)Department of Chemistry, School of Sciences, Beijing Institute of Technology, Beijing 100081, China; (2)Institute of Chemical Physics, Beijing Institute of Technology, Beijing 100081, China; (3)Key Laboratory of Cluster Science of Ministry of Education and Department of Physics, School of Sciences, Beijing Institute of Technology, Beijing 100081, China

收稿日期:2010-11-02 修回日期:2011-05-31 出版日期:2011-10-15 发布日期:2011-10-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11075013 and 10974016).

Improving quantum state transfer in a general XY chain via the Dzyaloshinsky–Moriya interaction

Zhang Jian(张剑)^a)^†, Shao Bin(邵彬)^b), Zou Jian(邹健)^b), and Li Qian-Shu(李前树)^c)

^a Department of Chemistry, School of Sciences, Beijing Institute of Technology, Beijing 100081, China; ^b Key Laboratory of Cluster Science of Ministry of Education and Department of Physics, School of Sciences, Beijing Institute of Technology, Beijing 100081, China; ^c Institute of Chemical Physics, Beijing Institute of Technology, Beijing 100081, China

Received:2010-11-02 Revised:2011-05-31 Online:2011-10-15 Published:2011-10-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11075013 and 10974016).

摘要/Abstract

摘要： We study the state transfer of Bell states in a general XY spin chain using the Dzyaloshinsky-Moriya interaction. Two symmetries of fidelity with the anisotropy parameter are found. The maximum fidelity is shown to be significantly enhanced in cases of an odd number of sites. Enhancement of fidelity on a singlet state is greater than that on the other Bell states in such cases.

关键词: state transfer, XY spin chain, Dzyaloshinsky-Moriya interaction

Abstract: We study the state transfer of Bell states in a general XY spin chain using the Dzyaloshinsky-Moriya interaction. Two symmetries of fidelity with the anisotropy parameter are found. The maximum fidelity is shown to be significantly enhanced in cases of an odd number of sites. Enhancement of fidelity on a singlet state is greater than that on the other Bell states in such cases.

Key words: state transfer, XY spin chain, Dzyaloshinsky-Moriya interaction

中图分类号: (Quantum communication)

03.67.Hk

75.10.Jm (Quantized spin models, including quantum spin frustration)

张剑, 邵彬, 邹健, 李前树. Improving quantum state transfer in a general XY chain via the Dzyaloshinsky–Moriya interaction[J]. 中国物理B, 2011, 20(10): 100307-100307.

Zhang Jian(张剑), Shao Bin(邵彬), Zou Jian(邹健), and Li Qian-Shu(李前树) . Improving quantum state transfer in a general XY chain via the Dzyaloshinsky–Moriya interaction[J]. Chin. Phys. B, 2011, 20(10): 100307-100307.

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Improving quantum state transfer in a general XY chain via the Dzyaloshinsky–Moriya interaction

Improving quantum state transfer in a general XY chain via the Dzyaloshinsky–Moriya interaction

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