预览加载中，请您耐心等待几秒...

基于脉冲位置调制的测量设备无关量子密钥分发（英文）.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

基于脉冲位置调制的测量设备无关量子密钥分发（英文） QuantumKeyDistribution(QKD)isanimportanttechnologyinthefieldofquantuminformationscience.Itisasecuremethodfortransmittingconfidentialinformationbetweentwopartiesoveraninsecurecommunicationchannel.QKDisbasedontheprinciplesofquantummechanicswhichmakesittheoreticallyimpossibleforaneavesdroppertointerceptordecodethetransmittedmessage.However,theimplementationofQKDfacesanumberofchallengesduetothepresenceofvariousnoisesourcesinthequantumcommunicationchannel.Inthispaper,weintroduceameasurementdeviceindependentQKDprotocolbasedonPulsePositionModulation(PPM),whichovercomessomeofthelimitationsoftraditionalQKDsystems. MeasurementDeviceIndependentQKD(MDI-QKD)isaparadigmofQKDthatenablesthesecurityofaquantumcommunicationsystemwithoutrequiringtrustinthemeasurementsmadebythedevicesusedfortransmittingandreceivingthequantumsignals.TheMDI-QKDprotocolisbasedontheBell'sinequalitytestwhichisusedtodetectthepresenceofaneavesdropper.ThePPM-basedMDI-QKDprotocolemploysapulse-basedapproachinwhichbinaryinformationisencodedusingpulsepositions. ThePPM-basedMDI-QKDprotocoloffersseveraladvantagesoverconventionalQKDsystems.Firstly,itisimmunetoside-channelattackssuchasphoton-numbersplittingandblindingattacks.Secondly,itdoesnotrequiretheuseofaquantummemorywhichsimplifiestheimplementationofthesystem.Thirdly,itislesssensitivetonoiseduetoitspulse-basednature.Inthefollowingsections,wewilldiscussthePPM-basedMDI-QKDprotocolindetail. ThePPM-basedMDI-QKDprotocolhastwophases:thepreparationphaseandthecommunicationphase.Inthepreparationphase,eachofthetwopartiesgeneratesastreamofrandompulsesusinganappropriatelightsource.Thesendermodulatesthepulsepositionstorepresentthebitsoftherawkey(0or1).Thereceivermeasuresthearrivaltimesofthepulsesandobtainsastringoftimevalueswhichcorrespondstothekeybits.Bothpartieskeeparecordoftheirrespectivepulsestreamsandthetransmissiontimes. Inthecommunicationphase,thetwopartiesexchangetheirpulsestreamsalongwiththetiminginformation.Thereceiversuperimposestheirpulses