远程制备任意双粒子态

J4 ›› 2011, Vol. 28 ›› Issue (4): 414-419.

远程制备任意双粒子态

石国芳

西安邮电学院理学院, 陕西西安 710061

收稿日期:2010-11-02 修回日期:2011-02-09 出版日期:2011-07-28 发布日期:2011-07-06
通讯作者: 石国芳（1977-），女，山西省原平市人，讲师，研究方向为理论物理、量子信息． E-mail:shiguofang9@163.com
基金资助:
This work was supported by The Specialized Research Program of Education Bureau of Shaanxi Province under Grant Nos.2010JK828 and The Youth Foundation of Xi’an University of Posts and Telecommunications under Grant No. ZL2010-33

Remote preparation of arbitrary two-qubit state

SHI Guofang

School of Science，Xi’an University of Posts and Telecommunications， Xi’an 710061， China

Received:2010-11-02 Revised:2011-02-09 Published:2011-07-28 Online:2011-07-06
Supported by:
This work was supported by The Specialized Research Program of Education Bureau of Shaanxi Province under Grant Nos.2010JK828 and The Youth Foundation of Xi’an University of Posts and Telecommunications under Grant No. ZL2010-33

摘要/Abstract

摘要：

王和闫设计出利用两步方法确定性地实现远程制备单粒子态，受到这个思想的启发，我们研究了任意形式双粒子态的远程制备。在我们的方案中，两个非最大纠缠GHZ态用作量子通道，制备者Alice将已知态的全部信息分割为两部分，一部分为实系数部分，另一部分为相因子部分。制备者Alice执行两次投影测量并将测量结果用４比特经典信息告诉Bob，远方接收者Bob可以通过合适的幺正变换以概率4Ιβγ²Ι成功地获得目标态，此成功概率比刘的方案高，这也是本方案的优点所在, 因为在刘的方案中只有二粒子实系数态或赤道态的远程制备才能达到这个概率值。

关键词: 量子光学, 确定性远程态制备, GHZ态

Abstract:

Inspired by the idea of Wang and Yans’, i.e., a two-step exact remote state preparation (RSP) of an arbitrary qubit, we study the remote preparation of arbitrary two-qubit state. In our scheme, two non-maximally entangled GHZ state act as quantum channels. The sender Alice divides the full information encoded in known state into two parts, one purely real coefficients and the other purely real phase factor. After twice projective measurements and the transmission of 4-bit classical information by Alice, the remote receiver Bob can obtain the desired state with the success probability 4Ιβγ²Ι which is higher than that in Liu’s protocol and it is also the advantage of our scheme, because only two-qubit state in real Hilbert space or equatorial-like state can reach this success probability value in Liu’s protocol.

Key words: q quantum optics, remote state preparation, GHZ state

中图分类号:

O431.2

石国芳. 远程制备任意双粒子态[J]. J4, 2011, 28(4): 414-419.

SHI Guofang. Remote preparation of arbitrary two-qubit state[J]. J4, 2011, 28(4): 414-419.

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