One-step quantum dialogue

doi:10.1088/1674-1056/ad1c5c

中国物理B ›› 2024, Vol. 33 ›› Issue (3): 30302-030302.doi: 10.1088/1674-1056/ad1c5c

One-step quantum dialogue

Peng-Hui Zhu(朱鹏辉)^1,2, Wei Zhong(钟伟)³, Ming-Ming Du(杜明明)², Xi-Yun Li(李喜云)¹, Lan Zhou(周澜)^1,†, and Yu-Bo Sheng(盛宇波)^2,3,‡

1 College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
2 College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
3 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

收稿日期:2023-11-23 修回日期:2023-12-29 接受日期:2024-01-09 出版日期:2024-02-22 发布日期:2024-02-22
通讯作者: Lan Zhou, Yu-Bo Sheng E-mail:zhoul@njupt.edu.cn;shengyb@njupt.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12175106 and 92365110).

One-step quantum dialogue

Peng-Hui Zhu(朱鹏辉)^1,2, Wei Zhong(钟伟)³, Ming-Ming Du(杜明明)², Xi-Yun Li(李喜云)¹, Lan Zhou(周澜)^1,†, and Yu-Bo Sheng(盛宇波)^2,3,‡

1 College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
2 College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
3 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Received:2023-11-23 Revised:2023-12-29 Accepted:2024-01-09 Online:2024-02-22 Published:2024-02-22
Contact: Lan Zhou, Yu-Bo Sheng E-mail:zhoul@njupt.edu.cn;shengyb@njupt.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12175106 and 92365110).

摘要/Abstract

摘要： Quantum dialogue (QD) enables two communication parties to directly exchange secret messages simultaneously. In conventional QD protocols, photons need to transmit in the quantum channel for two rounds. In this paper, we propose a one-step QD protocol based on the hyperentanglement. With the help of the non-local hyperentanglement-assisted Bell state measurement (BSM), the photons only need to transmit in the quantum channel once. We prove that our one-step QD protocol is secure in theory and numerically simulate its secret message capacity under practical experimental condition. Compared with previous QD protocols, the one-step QD protocol can effectively simplify the experiment operations and reduce the message loss caused by the photon transmission loss. Meanwhile, the non-local hyperentanglement-assisted BSM has a success probability of 100% and is feasible with linear optical elements. Moreover, combined with the hyperentanglement heralded amplification and purification, our protocol is possible to realize long-distance one-step QD.

关键词: one-step quantum dialogue, hyperentanglement, hyperentanglement distribution, non-local Bell-state measurement

Abstract: Quantum dialogue (QD) enables two communication parties to directly exchange secret messages simultaneously. In conventional QD protocols, photons need to transmit in the quantum channel for two rounds. In this paper, we propose a one-step QD protocol based on the hyperentanglement. With the help of the non-local hyperentanglement-assisted Bell state measurement (BSM), the photons only need to transmit in the quantum channel once. We prove that our one-step QD protocol is secure in theory and numerically simulate its secret message capacity under practical experimental condition. Compared with previous QD protocols, the one-step QD protocol can effectively simplify the experiment operations and reduce the message loss caused by the photon transmission loss. Meanwhile, the non-local hyperentanglement-assisted BSM has a success probability of 100% and is feasible with linear optical elements. Moreover, combined with the hyperentanglement heralded amplification and purification, our protocol is possible to realize long-distance one-step QD.

Key words: one-step quantum dialogue, hyperentanglement, hyperentanglement distribution, non-local Bell-state measurement

中图分类号: (Quantum error correction and other methods for protection against decoherence)

03.67.Pp

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

Peng-Hui Zhu(朱鹏辉), Wei Zhong(钟伟), Ming-Ming Du(杜明明), Xi-Yun Li(李喜云), Lan Zhou(周澜), and Yu-Bo Sheng(盛宇波). One-step quantum dialogue[J]. 中国物理B, 2024, 33(3): 30302-030302.

Peng-Hui Zhu(朱鹏辉), Wei Zhong(钟伟), Ming-Ming Du(杜明明), Xi-Yun Li(李喜云), Lan Zhou(周澜), and Yu-Bo Sheng(盛宇波). One-step quantum dialogue[J]. Chin. Phys. B, 2024, 33(3): 30302-030302.

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