用约瑟夫森结量子比特制备簇态

J4 ›› 2009, Vol. 26 ›› Issue (5): 570-576.

用约瑟夫森结量子比特制备簇态

陶蕊郑小虎曹卓良

光电信息获取与控制教育部重点实验室; 安徽大学物理与材料科学学院;合肥师范学院物理系

出版日期:2009-09-28 发布日期:2009-08-27
通讯作者: 郑小虎（1964-），男，安徽宿松人，博士，安徽大学物理与材料科学学院副教授，研究方向为量子信息. E-mail:xhzheng@ahu.edu.cn
作者简介:陶蕊（1980- ）女，山东梁山人，在读研究生，研究方向为量子信息和量子计算。

A scheme for generating cluster state with Josephson charge qubit

TAO Rui, ZHENG Xiao-Hu, CAO Zhuo-Liang

1 Key Laboratory of Opto-electronic Information Acquisition and Manipulation, Ministry of Education, School of Physics and Material Science, Anhui University, Hefei 230039, China;
2 Department of Physics, Hefei Teachers College, Hefei 230061, China

Published:2009-09-28 Online:2009-08-27

摘要/Abstract

摘要：

高度纠缠的簇态是一种常见的测量基的量子计算的资源。这里提出了基于约瑟夫森比特的簇态实现方案。方案简单且易于操作，每个量子比特是通过包括一个超导岛和一个库伯对盒来实现的，任意两个约瑟夫森结量子比特可以通过一个对称的直流射频超导干涉仪相互耦合。通过调节每个实现量子比特的的门电压，来设定合适的初态，通过调节系统内相应的参量从而实现一个一个环路的耦合作用，以实现簇态。经过文章理论推导，方案简便易操作。在现在的技术条件下，方案完全可行。

关键词: 量子光学, 簇态, 超导量子比特, 约瑟夫森结

Abstract:

Highly entangled states called cluster states are an universal resource for measurement based quantum computing (QC). Based on the Josephson charge qubits, a scheme for generating cluster states is proposed.The scheme is simple and easily manipulated, because any two charge qubits based on Josephson junction can be selectively and effectively coupled by a symmetric dc SQUID. Initially state can be generated via changing the gate voltages, and couple charge qubits by choosing the suitable parameters. All the devices in the scheme are within the current technology.

Key words: quantum optics, cluster state, superconducting qubit, Josephson junction

陶蕊郑小虎曹卓良. 用约瑟夫森结量子比特制备簇态[J]. J4, 2009, 26(5): 570-576.

TAO Rui, ZHENG Xiao-Hu, CAO Zhuo-Liang. A scheme for generating cluster state with Josephson charge qubit[J]. J4, 2009, 26(5): 570-576.

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