量子密钥分发系统中数字控制模块的设计

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1、中国科学技术大学硕士学位论文量子密钥分发系统中数字控制模块的设计姓名：万旭申请学位级别：硕士专业：物理电子学指导教师：王坚20100501摘要关键词：量子通信量子密钥分发数字控制模块FPGAUSBIIABSTRACTQuantuminformationisanewsubjectthatdevelopsuponthecombinationofquantumphysicsandinformationscience．Sincetheintroductionofquantummechanics，ithastheincomparableadvantagesandpr

2、ospectstoclassicinformation,andhasarousedwideinterest．Atpresent，greatprogresshasbeenmadeinboththeoryandexperiment．Furthermore，praticalcommercialproducBhavecomeintobeing．Quantuminformationincludestwoareas：quantumcommunicationandquantumcomputing．Quantumcomputersandquantumalgorithmfo

3、rquantumcomputersarethesubjectsthatquantumcomputingstudies．Andforquantumcommunication，themajorresearchsubjectslieinquantumcryptography,quantumteleportion，andlong-distancequantumcommunicationtechnology．Quantumcryptography,alsoknownasquantumkeydistribution(QKD)，usesquantummechanical

4、propertiestoensurecommunicationsecurity．Itenablestheproductandsharingofarandom，securekeytoencryptanddecryptinformationbetweenthetwopartiesincommunication．Inthisarticle，wefocusonthefieldofquantumcommunication．SincethefirstquantumkeydistributionprotocolproposedbyBennettandBrassardin

5、1984，manyQKDexperimentsbasedondifferentprotocolshavebeencompletedusingdifferentquantuminformatinchannels．Decades，governments，researchinstitutionsandcompaniesinvestalotofresourcestothestudyofquantumsecurecommunication，makingitcometoOUreverydaylifefromlabs．QuantumPhysicsandQuantumIn

6、formationLaboratoryinUSTCdevelopsakindofQKDsystem，whichisanattemptofpracticality．Intheworkofthisarticle，circuitdesignofdigitalcontrolmoduleinQKDsystemhascompleted，includingFPGA-basedcontrolboardandsynchronization-acquisition-delayboard．Whilehavingagoodcostcontrol，theboardachievesa

7、varietyofcomplexlogicbyusingFPGA嬲thecore，whichispowerfulandflexible．ThecontrolboardusesUSBtocommunicatewithPCandcommunicateswitllotherelectronicsmodulesthroughacustombackplanebus，completingcontrollingfunctionoftheelectronicssection．Synchronization—acquisition—delayboardreceivesand

8、discriminatesthesynclightpulses，p