Two-qubit and three-qubit controlled gates with cross-Kerr nonlinearity

doi:10.1088/1674-1056/22/3/030313

中国物理B ›› 2013, Vol. 22 ›› Issue (3): 30313-030313.doi: 10.1088/1674-1056/22/3/030313

Two-qubit and three-qubit controlled gates with cross-Kerr nonlinearity

赵瑞通^a, 郭奇^b, 程留永^b, 孙立莉^b, 王洪福^a, 张寿^a

a Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
b Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China

收稿日期:2012-07-30 修回日期:2012-09-10 出版日期:2013-02-01 发布日期:2013-02-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61068001 and 11264042) and the Program for Chun Miao Excellent Talents of Department of Education of Jilin Province China (Grant No. 201316).

Two-qubit and three-qubit controlled gates with cross-Kerr nonlinearity

Zhao Rui-Tong (赵瑞通)^a, Guo Qi (郭奇)^b, Cheng Liu-Yong (程留永)^b, Sun Li-Li (孙立莉)^b, Wang Hong-Fu (王洪福)^a, Zhang Shou (张寿)^a

a Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
b Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China

Received:2012-07-30 Revised:2012-09-10 Online:2013-02-01 Published:2013-02-01
Contact: Zhang Shou E-mail:szhang@ybu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61068001 and 11264042) and the Program for Chun Miao Excellent Talents of Department of Education of Jilin Province China (Grant No. 201316).

摘要/Abstract

摘要： Schemes for two-qubit and three-qubit controlled gates based on cross-Kerr nonlinearity are proposed in this paper. The success probability of these gates can be increased by the quantum nondemolition detectors which are used to judge which paths the signal photons pass through. These schemes are nearly deterministic and require no ancilla photon. The advantages of these gates over the existing ones include Less resource consumption and higher success probability, which make our schemes more feasible with current technology.

关键词: quantum controlled gates, cross-Kerr nonlinearity, quantum nondemolition detector

Abstract: Schemes for two-qubit and three-qubit controlled gates based on cross-Kerr nonlinearity are proposed in this paper. The success probability of these gates can be increased by the quantum nondemolition detectors which are used to judge which paths the signal photons pass through. These schemes are nearly deterministic and require no ancilla photon. The advantages of these gates over the existing ones include Less resource consumption and higher success probability, which make our schemes more feasible with current technology.

Key words: quantum controlled gates, cross-Kerr nonlinearity, quantum nondemolition detector

中图分类号: (Quantum information)

03.67.-a

03.67.Lx (Quantum computation architectures and implementations) 42.50.Ex (Optical implementations of quantum information processing and transfer)

赵瑞通, 郭奇, 程留永, 孙立莉, 王洪福, 张寿. Two-qubit and three-qubit controlled gates with cross-Kerr nonlinearity[J]. 中国物理B, 2013, 22(3): 30313-030313.

Zhao Rui-Tong (赵瑞通), Guo Qi (郭奇), Cheng Liu-Yong (程留永), Sun Li-Li (孙立莉), Wang Hong-Fu (王洪福), Zhang Shou (张寿). Two-qubit and three-qubit controlled gates with cross-Kerr nonlinearity[J]. Chin. Phys. B, 2013, 22(3): 30313-030313.

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Two-qubit and three-qubit controlled gates with cross-Kerr nonlinearity

Two-qubit and three-qubit controlled gates with cross-Kerr nonlinearity

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