在离子阱中实现量子SWAP门的方案

J4 ›› 2009, Vol. 26 ›› Issue (5): 555-559.

在离子阱中实现量子SWAP门的方案

胡桂玉杨振叶柳

安徽大学物理与材料科学学院，安徽合肥 230039

出版日期:2009-09-28 发布日期:2009-08-27
通讯作者: 叶柳（1964- ），女，理学博士，教授，主要研究领域为量子计算与量子信息. E-mail:yeliu@ahu.edu.cn
作者简介:胡桂玉（1985- ），女，安徽大学在读研究生，主要研究领域为量子计算与量子信息，E-mail: huguiyu123@yahoo.cn.
基金资助:
National Science Foundation of China(10674001);Important Program of the Education Department of Anhui Province (KJ2007A002)

Implementing a quantum SWAP gate in ion-trap systems

HU Gui-Yu, YANG Zhen, YE Liu

School of Physics & Material Science, Anhui University, Hefei 230039, China

Published:2009-09-28 Online:2009-08-27
Supported by:
National Science Foundation of China(10674001);Important Program of the Education Department of Anhui Province (KJ2007A002)

摘要/Abstract

摘要：

提出了一个利用处在线性阱中的两个全同的三能级离子与两个不同频率的激光脉冲共振相互作用来实现两比特量子SWAP门的方案，该方案是根据Haffner H.和 Riebe M等人的实验方法与结果选择离子的基态的一个塞曼能级作为基态，以亚稳态的两个塞曼能级作为两个激发态来实现的，选择适当的参数如质心模的频率，拉比频率以及Lamb-Dicke参数，计算出实现该方案所用的总时间为，该时间远小于亚稳态的寿命，并且在这个方案里消相干是可以被忽略的。在目前的离子阱技术条件下，该方案是可以实现的。

关键词: 量子光学, 量子SWAP门, 离子阱, 共振

Abstract:

A novel scheme for realizing a two-qubit quantum SWAP gate in ion-trap systems is proposed. We consider two three-level ions which are confined in a linear trap interact with two different frequency laser pulse in the case of resonant. According to the experimental methods and result of Haffner H. and Riebe M, one Zeeman level of the ground state of ion can act as one ground state, while two Zeeman levels of the metastable state act as the excited states. With choosing appropriate parameters such as , and , the total time required to complete the procedure is about much shorter than the lifetime of the metastable state, and in this scheme decoherence is negligible. Thus this scheme may be realized with presently available ion-trap techniques.

Key words: quantum optics, quantum SWAP gate, ion-trap systems, resonant

胡桂玉杨振叶柳. 在离子阱中实现量子SWAP门的方案[J]. J4, 2009, 26(5): 555-559.

HU Gui-Yu, YANG Zhen, YE Liu. Implementing a quantum SWAP gate in ion-trap systems[J]. J4, 2009, 26(5): 555-559.

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