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One-step quantum dialogue

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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 hyper-entanglement heralded amplification and purification,our protocol is possible to realize long-distance one-step QD.

one-step quantum dialoguehyperentanglementhyperentanglement distributionnon-local Bell-state measurement

朱鹏辉、钟伟、杜明明、李喜云、周澜、盛宇波

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College of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China

College of Electronic and Optical Engineering & College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China

Institute of Quantum Information and Technology,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

国家自然科学基金国家自然科学基金

1217510692365110

2024

10.1088/1674-1056/ad1c5c

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(3)
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