囚禁离子多体纠缠态的简单制备方案

J4 ›› 2011, Vol. 28 ›› Issue (4): 420-428.

囚禁离子多体纠缠态的简单制备方案

钟锋¹,于立志²,熊文元¹

1 湖南科技学院物理系, 湖南永州 425100；
2 阜阳师范学院物理与电子科学学院，安徽阜阳 236041

收稿日期:2010-05-06 修回日期:2010-12-19 出版日期:2011-07-28 发布日期:2011-07-06
通讯作者: 钟锋(1980-),硕士，讲师，研究领域为量子光学。 E-mail:zf_80@126.com
基金资助:
Project was supported by the Youth Talent Foundation of Hunan University of Science and Engineering under Grant No. 09XKYTB007 and the Youth Talent Foundation of Anhui Province under Grant No.2010SQRL146.

Simple schemes for preparation of multipartite entangled states of trapped ions

ZHONG Feng¹，YU Lizhi²，XIONG Wenyuan¹

1 Department of Physics, Hunan University of Science and Engineering, Yongzhou 425100, China;
2 Department of Physics and Electrics, Fuyang Teachers College, Fuyang 236041, China

Received:2010-05-06 Revised:2010-12-19 Published:2011-07-28 Online:2011-07-06

摘要/Abstract

摘要：

提出了三种制备冷离子多体纠缠态的简单方案。第一个方案是关于GHZ态的制备，其只需要利用激光对所有离子进行一次集体驱动。第二个方案是制备对称的W态，W态的产生需要两步操作才能完成。第三个方案是研究簇态的制备，并讨论了利用两个小簇态合成一个大簇态的方法和过程，这种合成法可以增加大簇态的产生速度，从而可以减低实验中因退相干而产生的失真。以上三个方案都是利用振动态处于基态的多个离子与激光场的大失谐相互作用来实现的。与以前的方案相比，这些方案有以下四个优点：不需要离子的振动模来存储和传递信息；不需要单个地驱动这些离子；不受激光场的相位涨落的影响；需要相对少的操作步骤。

关键词: 量子光学, 离了阱, GHZ态, W态, 簇态

Abstract:

Three experimentally feasible schemes are proposed for generating multipartite entangled states of cold trapped ions. In the first scheme, a GHZ state can be simply synthesized in a single step. The second scheme is to prepare fully symmetric W states with two steps . The third scheme describes the sequential generation of linear cluster states. in addition, a method to create a larger cluster state was also presented by fuzing the end qubits of two smaller cluster states, which can speed up the generation of large cluster states. The above schemes involve the collective interaction between multiple ions with the vibrational ground state and a large detuned laser. Compared with previous schemes, the above schemes have four advantages. Firstly, they do not require the vibrational mode of the ions as memory. Secondly, they do not need to address the ions individually. Thirdly, they are are free from the effects of phase fluctuation of laser field. Finally, they need less operations.

Key words: quantum optics, ion-trap, GHZ state, W state, cluster state

中图分类号:

O431.2

钟锋,于立志,熊文元. 囚禁离子多体纠缠态的简单制备方案[J]. J4, 2011, 28(4): 420-428.

ZHONG Feng, YU Lizhi,XIONG Wenyuan. Simple schemes for preparation of multipartite entangled states of trapped ions[J]. J4, 2011, 28(4): 420-428.

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