J4 ›› 2012, Vol. 29 ›› Issue (5): 572-576.

• 量子光学 • 上一篇    下一篇

任意态量子信息在自旋链上的传输

任恒峰1,王清亮1,侯胜侠2,连润明1,杨瑞1   

  1. 1 忻州师范学院物理系,山西 忻州,034000;
    2 河北理工大学轻工学院,河北 唐山,063000
  • 收稿日期:2011-09-20 修回日期:2011-10-26 出版日期:2012-09-28 发布日期:2012-09-02
  • 通讯作者: 任恒峰(1978-),女,山西大同人,硕士,讲师,主要从事量子信息研究。 E-mail:leky.w@mail.nankai.edu.cn
  • 基金资助:

    山西省青年科技研究基金(批准号:2010021003-5),忻州师院院级基金(批准号:200901)资助项目

Quantum information transfer about multiple states in spin chain

REN Heng-feng1,WANG Qing-liang1,HOU Sheng-xia2,LIAN Run-ming1,YANG Rui1   

  1. 1 Department of Physics, Xinzhou Teachers University, Xinzhou  034000, China;
    2 College of Light industry, Hebei Polytechnic University, Tangshan  063000, China
  • Received:2011-09-20 Revised:2011-10-26 Published:2012-09-28 Online:2012-09-02

摘要:

量子信息传输是量子信息的一个重要分支。以自旋链上单态量子信息的传输为基础,详细讨论了两态和三态信息在自旋链上的传输,并进一步推广至任意态的情形。最终得出在自旋链上两态、三态乃至任意多态的量子信息传输的概率公式,以及自旋链完备传输任意态信息的条件。从而为任意多态量子信息的完备传输提供了一套切实可行的理论方案。

关键词: 量子信息, 完备传输, 自由演化, 自旋链

Abstract:

Quantum information transfer is one of the important branches in quantum infromation. Based on the single state quantum information transfer in spin chain, detailedly discuss the transfer of the two and three states in spin chain, and then the scheme is expanded to the arbitrary n states furthermore. Finally, the probability formula is obtained that quantum information of the arbitrary n-state transfers in spin chain, and the condition that the arbitrary n-state information can be transferred perfectly in spin chain is given as well. Accordingly, a reasonable theoretical scheme is offered for the perfect transfer of the arbitrary n-state information.

Key words: quantum information, perfect transfer, free evolution, spin chain

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