Implementation of unambiguous comparison for unknown pure quantum states with cavity-assisted interaction

doi:10.1088/1674-1056/22/5/050306

中国物理B ›› 2013, Vol. 22 ›› Issue (5): 50306-050306.doi: 10.1088/1674-1056/22/5/050306

Implementation of unambiguous comparison for unknown pure quantum states with cavity-assisted interaction

程留永^a, 王洪福^b, 张寿^{a b}, Yeon Kyu-Hwang^c

a Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
b Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
c BK21 Program Physics & Department of Physics, College of Natural Science, Chungbuk National University,Cheonju, Chungbuk 361-763, Republic of Korea

收稿日期:2012-09-07 修回日期:2012-11-13 出版日期:2013-04-01 发布日期:2013-04-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61068001 and 11264042), the China Postdoctoral Science Foundation (Grant No. 2012M520612), and the Talent Program of Yanbian University of China (Grant No. 950010001).

Implementation of unambiguous comparison for unknown pure quantum states with cavity-assisted interaction

Cheng Liu-Yong (程留永)^a, Wang Hong-Fu (王洪福)^b, Zhang Shou (张寿)^{a b}, Yeon Kyu-Hwang^c

a Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
b Department of Physics, College of Science, Yanbian University, Yanji 133002, China;
c BK21 Program Physics & Department of Physics, College of Natural Science, Chungbuk National University,Cheonju, Chungbuk 361-763, Republic of Korea

Received:2012-09-07 Revised:2012-11-13 Online:2013-04-01 Published:2013-04-01
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), the China Postdoctoral Science Foundation (Grant No. 2012M520612), and the Talent Program of Yanbian University of China (Grant No. 950010001).

摘要/Abstract

摘要： We propose two effective schemes for local and remote unknown atomic state comparisons with cavity-assisted single photon input-output process without any initial entanglement or auxiliary resource. And the unambiguous state discrimination is considered using the state comparison process as the basic module. All the implementation schemes here just involve common quantum logic gates and the single qubit measurement. The analysis shows that our schemes are feasible under the current experimental conditions.

关键词: unambiguous state comparison, atomic qubit, cavity-assisted interaction

Abstract: We propose two effective schemes for local and remote unknown atomic state comparisons with cavity-assisted single photon input-output process without any initial entanglement or auxiliary resource. And the unambiguous state discrimination is considered using the state comparison process as the basic module. All the implementation schemes here just involve common quantum logic gates and the single qubit measurement. The analysis shows that our schemes are feasible under the current experimental conditions.

Key words: unambiguous state comparison, atomic qubit, cavity-assisted interaction

中图分类号: (Quantum information)

03.67.-a

42.50.Dv (Quantum state engineering and measurements) 42.50.Pq (Cavity quantum electrodynamics; micromasers)

程留永, 王洪福, 张寿, Yeon Kyu-Hwang. Implementation of unambiguous comparison for unknown pure quantum states with cavity-assisted interaction[J]. 中国物理B, 2013, 22(5): 50306-050306.

Cheng Liu-Yong (程留永), Wang Hong-Fu (王洪福), Zhang Shou (张寿), Yeon Kyu-Hwang. Implementation of unambiguous comparison for unknown pure quantum states with cavity-assisted interaction[J]. Chin. Phys. B, 2013, 22(5): 50306-050306.

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Implementation of unambiguous comparison for unknown pure quantum states with cavity-assisted interaction

Implementation of unambiguous comparison for unknown pure quantum states with cavity-assisted interaction

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