中国物理B ›› 2006, Vol. 15 ›› Issue (2): 272-275.doi: 10.1088/1009-1963/15/2/005

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Effect of disturbance in perfect state transfer

刘丹, 张竞夫   

  1. Key Laboratory for Quantum Information and Measurements, Department of Physics, Tsinghua University, Beijing 100084, China; Center for Quantum Information, Tsinghua University, Beijing 100084, China
  • 收稿日期:2005-05-24 修回日期:2005-07-21 出版日期:2006-02-20 发布日期:2006-02-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10374010).

Effect of disturbance in perfect state transfer

Liu Dan (刘丹), Zhang Jing-Fu (张竞夫)   

  1. Key Laboratory for Quantum Information and Measurements, Department of Physics, Tsinghua University, Beijing 100084, China; Center for Quantum Information, Tsinghua University, Beijing 100084, China
  • Received:2005-05-24 Revised:2005-07-21 Online:2006-02-20 Published:2006-02-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10374010).

摘要: The influence of the disturbance caused by the imperfection of the engineering coupling constants in the perfect state transfer is calculated. The results show that the fidelity for the perfect state transfer is seriously affected by the errors occurring near the input and output spins. Such results are helpful for the realization of the perfect state transfer in the case where there exist errors in experiments.

关键词: XY-chain, perfect state transfer, disturbance

Abstract: The influence of the disturbance caused by the imperfection of the engineering coupling constants in the perfect state transfer is calculated. The results show that the fidelity for the perfect state transfer is seriously affected by the errors occurring near the input and output spins. Such results are helpful for the realization of the perfect state transfer in the case where there exist errors in experiments.

Key words: XY-chain, perfect state transfer, disturbance

中图分类号:  (Quantum computation architectures and implementations)

  • 03.67.Lx
03.65.Ta (Foundations of quantum mechanics; measurement theory)