简介：我们与背景的一个任意的数字考察多国参加的贝尔不平等的历史的事实。为一个关联函数的值的一个明确的本地现实主义的模型，交上一个二背景的贝尔实验(二背景的模型)，仅仅为在给定的实验的设置的特定的集合的工作，但是不能为一个关联函数的值构造一个本地现实主义的模型，交上一个连续无限的设置贝尔实验(无限背景的模型)，尽管在那里存在为在空格的所有方向的二背景的模型。因此，二背景的模型没有无限背景的模型有的性质。这里，我们证明一个明确的二背景的模型不能为关联功能的价值构造一个本地现实主义的模型，交上一个M背景贝尔实验(M背景模型)，尽管在那里存在为在给定的M背景选择的M测量方向的二背景的模型试验。因此，二背景的模型没有M背景模型有的性质。

简介：Inthispaper,wewillexploretheessenceofthephenomenonthatstatewithlessentanglementmaygenerategreaterBellviolationinthetwo-qubitBelltestswithCH-typeinequalities,i.e.,morenonlocalitywithlessentanglement.Wewillshowthatthisinterestingbutcounterintuitivephenomenoniscausedbytherotationalasymmetryofthenonmaximallyentangledstateinthemeasurementplane.Thisasymmetryallowstheboth-sidedetectionprobabilitiesandtheone-sidedetectionprobabilitiesobtaintheirmaximalvalueswithnonmaximallyentangledstate.ButthemaximalBellviolationmaynotalwayshappenonnonmaximallyentangledstate,becausetheseprobabilitieswillcompetewitheachother,andtheBellviolationbehavesdiferentlyforvariousCH-typeinequalities.

简介：Logicqubitplaysanimportantroleincurrentquantumcommunication.Inthispaper,weproposeanefficiententanglementconcentrationprotocol(ECP)foranewkindoflogicBellstate,wherethelogicqubitistheconcatenatedGreenber-Horne-Zeilinger(C-GHZ)state.OurECPreliesonthenondemolitionpolarizationparitycheck(PPC)gatesconstructedwithcross-Kerrnonlinearity,andcandistillonepairofmaximallyentangledlogicBellstatefromtwosamepairsofless-entangledlogicBellstates.BenefitfromthenondemolitionPPCgates,theconcentratedmaximallyentangledlogicBellstatecanberemainedforfurtherapplication.Moreover,ourECPcanbercpeatedtofurtherconcentratetheless-entangledlogicBellstate.ByrepeatingtheECP.thetotalsuccessprobabilitycanbeeffectivelyincreased.Basedonabovefeatures,thisECPmaybeusefulinfuturelong-distancequantumcommunication.

简介：Fromthecomparisonofcorrelationtensorinthetheoryofquantumnetwork,theAlexanderrelationmatrixinthetheoryofknotcrystalsandtheidenticalinversionrelationsundertheactionofPaulimatrices,weshowthatthereisaonetoonecorrespondencebetweenfourBellbasesandfourorientedlinksofthelinkage41inknottheory.

简介：我们为斜Bellstates的任意的混合的远距传物建议一个协议，隧道能与混合的纯最大地纠缠的statesor绑了的任何一个被构造，这被显示出纠缠的状态。我们也介绍协议认识到经由多粒子的斜贝尔状态的控制teleportationof混合混合了状态。我们的结果证明boundentangled状态也是在量通讯任务的重要、有用的资源。

简介：Recently,Liuetal.[Commun.Theor.Phys.57(2012)583]proposedaquantumprivatecomparisonprotocolbasedonentanglementswappingofBellstates,whichaimstosecurelycomparetheequalityoftwoparticipants’informationwiththehelpofasemi-honestthirdparty(TP).However,thepresentstudypointsoutthereisafatalloopholeinLiuetal.’sprotocol,andTPcanmakeBell-basismeasurementtoknowalltheparticipants’secretinputswithoutbeingdetected.Tofixtheproblem,asimplesolution,whichusesone-timeeavesdroppercheckingwithdecoyphotonsinsteadoftwiceeavesdroppercheckingwithBellstates,isdemonstrated.Comparedwiththeoriginalprotocol,itnotonlyreducestheBellstatesconsumptionbutalsosimplifiestheprotocolsteps.

简介：量远距传物提供从一个目标把量状态传给另外一个的一个无形体的方法，在一个远地点，用一条古典通讯隧道和一个以前分享的纠缠的状态。在这份报纸，我们在场为一个任意的单个qubit状态的概率的远距传物的一个分成三部分的计划，没有失去状态的信息，是teleported，经由表格|的一个fourqubit簇状态>1234=|0000>+|1010>+|0101>-|1111>,作为量隧道非零实数，，，并且满足关系jj2+||2+||2+||2=1。与有州的|的辅助qubit的介绍0>用合适的单一的转变和一项积极操作员的珍视的措施(POVM)，接收装置能再创造原来的qubit的状态。远距传物计划的一个重要优点证明这是如果远距传物失败，没有未知的量状态的teleporting拷贝，它能被重复，如果担心的聚会分享另一纠缠的qubit。我们也为作为量隧道经由上述的簇状态和一个钟状态一个任意的二粒子的系统切开的量信息介绍一个协议。与安全攻击有关的问题被检验因为格和它被发现那这个协议是安全的。这个协议高度有效、容易实现。

简介：WeproposeaprotocoltoimplementthenonlocalBell-statemeasurement,whichisnearlydeterminatewiththehelpofweakcross-Kerrnonlinearitiesandquantumnon-destructivephotonnumberresolvingdetection.BasedonthenonlocalBell-statemeasurement,weimplementthequantuminformationtransferfromoneplacetoanother.Theprocessisdifferentfromconventionalteleportationbutcanberegardedasanovelformofteleportationwithoutentangledchannelandclassiccommunication.

简介：

简介：ViolationsofBellinequality,Cauchy-Schwarzinequalityandentanglementinatwo-modethree-levelatomicsystemareinvestigated.Itisshownthattherearesomestates,whichareentangledbutdonotviolateBellinequalityinthissystem.Moreover,therelationsofviolationsofBellinequality,Cauchy-Schwarzinequality,andentanglementarediscussedindetail.

简介：FromthecasestudyofEveningBellRingingatNanpingHill,oneoftheWestLakeCulturalLandscapesinHangzhou,China,weinvestigatedthesoundscapeofascenicareawithaprofoundculturalbackground.First,weconductedthesoundscapephysicalindexoftheareainbothwinterandspringseasonstoanalyzeitsobjectivegraphicalexpression.Second,wefocusedonpeople’sreactionstothesoundscapeinordertoobtainasubjectiveevaluationofeachcomponentinthesoundscapeandintegratedenvironment.Then,therelationshipbetweentheobjectivedataandthesubjectiveevaluationwasanalyzed.Finally,theimpactsofthenaturalenvironment,history,andculturalfactorsontheevaluationoftheJingciTemplesoundscapewerestudied.Itwasfoundthatnaturalsounds,culturalsounds,andhistoricsoundswerewidelyacclaimedinpeople’ssubjectivefeelings,whichindicatedthecloserelationshipsamonghistoricalandculturalbackground,soundscape,andnaturalenvironment.Thus,theconclusionwasmadethatsoundscapeshouldbeconsistentwiththelocalnaturalenvironmentandthehistoricalandculturalbackground.

简介：提出了一个基于约瑟夫森电荷量子比特实现未知三粒子的GHZ态的方案。在这方案中,三对两粒子纠缠态作为量子通道。此外,不需要bell测量。以目前的技术,在该方案中所用到的设备都可以实现。

简介：WepresentaschemeinwhichtheN-atomWstateisteleportedbyemployingtheselectiveinteractionofacavityfieldwithadriventhree-levelatomintheAconfigurationanddetectingasingleatominoneofthegroundstates.Thelong-livedWstateisteleportedfromatomAtoatomBwhentheatomsBandAaresentthroughacavitysuccessivelyandatomAisthendetected.TheadvantageisthatthepresentonedoesnotinvolvetheBell-statemeasurementandisrobustagainsttheatomicspontaneousemission.