典型文献
One-step quantum secure direct communication
文献摘要：
Quantum secure direct communication (QSDC) attracts much attention for it can transmit secret mes-sages directly without sharing a key.In this article,we propose a one-step QSDC protocol,which only requires to distribute polarization-spatial-mode hyperentanglement for one round.In this QSDC protocol,the eavesdropper cannot obtain any message,so that this protocol is unconditionally secure in principle.This protocol is a two-way quantum communication and has high capacity for it can transmit two bits of secret messages with one pair of hyperentanglement.With entanglement fidelities of both polarization and spatial-mode degrees of freedom being 0.98,the maximal communication distance of this one-step QSDC can reach about 216 km.QSDC can also be used to generate the key.In this regard,the key generation rate is estimated about 2.5 times of that in the entanglement-based QKD with the communi-cation distance of 150 km.With the help of future quantum repeaters,this QSDC protocol can provide unconditionally secure communication over arbitrarily long distance.
文献关键词：
中图分类号：
作者姓名：
Yu-Bo Sheng;Lan Zhou;Gui-Lu Long
作者机构：
College of Electronic and Optical Engineering & College of Microelectronics,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Institute of Quantum Information and Technology,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;School of Science,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Department of Physics,Tsinghua University,Beijing 100084,China;State Key Laboratory of Low-Dimensional Quantum Physics,Tsinghua University,Beijing 100084,China;Beijing National Research Center for Information Science and Technology,Beijing 100084,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,China
文献出处：
引用格式：
[1]Yu-Bo Sheng;Lan Zhou;Gui-Lu Long-.One-step quantum secure direct communication)[J].科学通报（英文版）,2022(04):367-374
A类：
sages,repeaters
B类：
One,step,quantum,secure,communication,Quantum,QSDC,attracts,much,attention,transmit,secret,directly,without,sharing,key,In,this,article,we,propose,one,protocol,which,only,requires,distribute,polarization,spatial,mode,hyperentanglement,round,eavesdropper,cannot,obtain,any,that,unconditionally,principle,This,two,way,has,high,capacity,bits,messages,pair,With,fidelities,both,degrees,freedom,being,maximal,distance,reach,about,also,used,generate,regard,generation,estimated,times,QKD,help,future,provide,over,arbitrarily,long
AB值：
0.463871
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