Direct measurement of the concurrence of hybrid entangled state based on parity check measurements

doi:10.1088/1674-1056/28/1/010301

中国物理B ›› 2019, Vol. 28 ›› Issue (1): 10301-010301.doi: 10.1088/1674-1056/28/1/010301

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Direct measurement of the concurrence of hybrid entangled state based on parity check measurements

Man Zhang(张曼), Lan Zhou(周澜), Wei Zhong(钟伟), Yu-Bo Sheng(盛宇波)

1 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2 School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
3 Key Laboratory of Broadband Wireless Communication and Sensor Network Technology(Ministry of Education), Nanjing University of Posts and Telecommunications, Nanjing 210003, China

收稿日期:2018-09-25 修回日期:2018-10-17 出版日期:2019-01-05 发布日期:2019-01-05
通讯作者: Yu-Bo Sheng E-mail:shengyb@njupt.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11474168 and 11747161) and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, China.

Direct measurement of the concurrence of hybrid entangled state based on parity check measurements

Man Zhang(张曼)¹, Lan Zhou(周澜)², Wei Zhong(钟伟)^1,3, Yu-Bo Sheng(盛宇波)^1,3

1 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2 School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
3 Key Laboratory of Broadband Wireless Communication and Sensor Network Technology(Ministry of Education), Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Received:2018-09-25 Revised:2018-10-17 Online:2019-01-05 Published:2019-01-05
Contact: Yu-Bo Sheng E-mail:shengyb@njupt.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11474168 and 11747161) and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, China.

摘要/Abstract

摘要：

The hybrid entangled state is widely discussed in quantum information processing. In this paper, we propose the first protocol to directly measure the concurrence of the hybrid entangled state. To complete the measurement, we design parity check measurements (PCMs) for both the single polarization qubit and the coherent state. In this protocol, we perform three rounds of PCMs. The results show that we can convert the concurrence into the success probability of picking up the correct states from the initial entangled states. This protocol only uses polarization beam splitters, beam splitters, and weak cross-Kerr nonlinearities, which is feasible for future experiments. This protocol may be useful in future quantum information processing.

关键词: hybrid entangled state, quantum computation, parity measurement, concurrence

Abstract:

Key words: hybrid entangled state, quantum computation, parity measurement, concurrence

中图分类号: (Quantum cryptography and communication security)

03.67.Dd

03.67.Hk (Quantum communication) 03.65.Ud (Entanglement and quantum nonlocality)

张曼, 周澜, 钟伟, 盛宇波. Direct measurement of the concurrence of hybrid entangled state based on parity check measurements[J]. 中国物理B, 2019, 28(1): 10301-010301.

Man Zhang(张曼), Lan Zhou(周澜), Wei Zhong(钟伟), Yu-Bo Sheng(盛宇波). Direct measurement of the concurrence of hybrid entangled state based on parity check measurements[J]. Chin. Phys. B, 2019, 28(1): 10301-010301.

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Direct measurement of the concurrence of hybrid entangled state based on parity check measurements

Direct measurement of the concurrence of hybrid entangled state based on parity check measurements

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