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两体贝尔不等式的应用.pdf 35页

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两体贝尔不等式的应用.pdf

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©aÒ:O413—?:Ãü“è:10446ÆÒ:2010200375•H“‰ŒÆa¬ÆØ©üNتA^ïÄ):4ï•“:šzBÇƉ;’:Ä:êÆƉ••:þf&E2013c4 •••HHH“““‰‰‰ŒŒŒÆÆÆÆÆÆØØØ©©©MMM555(((²²²LŠ¬¤J.é©ïĉѕ‡z‡<Ú8N,þ®3©¥±²(•ªI².<¿£(²{Æ(Jd<«ú.ÆØ©Šö¶:FÏ:cF•••HHH“““‰‰‰ŒŒŒÆÆÆÆÆÆØØØ©©©ÇÇǦ¦¦^^^(((²²²<)•H“‰ŒÆk"3,¦^ÆØ©5½,Æk3ÆØ©¿•I[Ì+Ü€½Ù•½ÅxØ©>f‡Ú’Ÿ‡.kòÆØ©^ušI|8þE›¿#NØ©?ÆãÖ,.kòÆØ©SN?k"êâ¥?1u¢.kòÆØ©IKÚÁ‡®?ч.—ÆØ©3)—·^5½.ÆØ©Šö¶:FÏ:cF ÁÁÁ‡‡‡þfŒ±L«þfåÆÄA,Ù¥þfÅ9þfåÆéõ¯K,¿3þfOŽÚþfÏ&ïÄ¥åX•‡Š^.¤±äþfÅ5´é•‡¯K,,äþfÅ´ØN´.Ï~·‚¬ÏL䘇þfØŒ©5`²´Å,ouŒ©â®k˜X7‡^‡,~PPTâ,zâ,››â,Ý•üâÚkTkâ.Ù¥Eت5äþfÅ5•´˜‡éЕ{.©ïÄ̇gŽÒ´|^®²EÐüNت5ä˜äNÅ5,¿…y²éunþf"Aùت«©n«ŒUVŒ©Å."…c:þfÅ,Œ©,ت,VŒ©Å AbstractQuantumstatescanexhibitmanyfeaturesofquantummechanics.Where,quantumentanglementinvolvesmanyproblemsaboutquantummechanicsandplayanimportantroleinthestudyofquantumcompu-tationandquantumcommunication.Therefore,itisaveryimportantproblemtodetecttheentanglementofquantumstatebutnoteasy.Generallywedetectentanglementofquantumstatebyillustratingitisnotseparable.Therearesomeseparabilitycriterions,forexample,PP-Tcriterion,reductioncriterion,controlcriterion,realignmentcriterionandkTkcriterion.WecandetectentanglementbyconstructingBellinequality.Themainideawedetectsomespeci cstatesbyusingsomeBellinequalitywhichhavebeenconstructedalreadyandprovingtheseinequalitiescandistinguishthreepossiblebi-separableentanglementforthree-qubitstates.Keywords:quantumentanglement,separable,Bellinequality,bi-separableentanglement 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