简介：Consideringthreetwo-levelatomsinitiallyintheWorGreenberger-Horne-Zeilinger(GHZ)state,oneofthethreeatomsisputintoaninitiallycoherentlightcavityandmadetoresonantlyinteractwiththecavity.Thetwoatomentanglementevolutionoutsidethecavityisinvestigated.Theinfluencesofstate-selectivemeasurementoftheatominsidethecavityandstrengthofthelightfieldonthetwo-atomentanglementevolutionoutsidethecavityarediscussed.Theresultsobtainedfromthenumericalmethodshowthatthetwo-atomentanglementoutsidethecavityisstrengthenedthroughstate-selectivemeasurementoftheatominsidethecavity.Inaddition,thestrengthofthelightfieldalsoinfluencesthetwo-atomentanglementproperties.

简介：WehavestudiedtheinterfacialstructuresofAlN/Si(111)grownbymetal-organicchemicalvapourdeposition.X-rayphotoelectronspectroscopyandAngerelectronspectroscopywereusedtoanalysethecomponentsandchemicalstructuresofAlN/Si(111).Theresultsindicatedthatamix-crystaltransitionregion,approximately12nm,waspresentbetweentheAlNfilmandtheSisubstrateanditwascomposedofAlNandSi3N4.AfteranalysiswefoundthattheexistenceofSi3N4couldnotbeavoidedintheAlN/Si(111)interfacebecauseofstrongdiffusionat1070℃.EveninAlNlayerSi-Nbonds,Si-Sibondscanbefound.

简介：Wepresentnumericalcalculationoftheimpactofelectron-electroninteractiononthebehaviorofdensityofstatesandopticalpropertiesofBeO,SiCandBoron-Nitridenanotubesandsheets.Hubbardmodelhamiltonianisappliedtodescribethedynamicsofelectronsonthelatticestructureofthesescompounds.TheexcitationspectrumofthesysteminthepresenceoflocalelectronicinteractionshasbeenfoundusingmeanSeldapproach.WefindthebandgapwidthinbothopticalabsorptionanddensityofstatesreduceswithlocalHubbardelectronicinteractionparameter.Theabsorptionspectraexhibitstheremarkablepeaks,mainlyowingtothedivergencebehaviorofdensityofstatesandexcitoniceffects.AlsowecompareopticalabsorptionfrequencybehaviorofBeO,SiCandBoron-Nitridenanotubeswitheachother.FurthermoreweinvestigatetheopticalpropertiesofBeOandSiCsheets.Anovelfeatureofopticalconductivityofthesestructuresisthedecreaseoffrequencygapintheopticalspectrumduetoelectronicinteraction.

简介：ThefluorescenceemissionandX-raydiffractionofmagenesium8-hydroxyquinolinecomplex(Mgq2)havebeenmeasuredathighpressureupto14GPa.Ithasbeenfoundthatpressurecaninfluencetheemissiondramatically.Atrelativelowerpressure(lessthan2.5GPa)thefluorescenceofMgq2changesslightly,buttheemissiondropsquicklywithincreaseofthepressurewhenthepressuregetshigherthan2.5GPa.TheresultsofinsituenergydispersiveX-raydiffractionathighpressurewithsynchrotronradiationindicatethatthereisaphasetransitionatabout2.5-3GPaforMgq2crystal.2001ElsevierScienceB.V.Allrightsreserved.

简介：Weconstructanewtypeofphoton-addedsqueezedcoherentstategeneratedbyrepeatedlyoperatingthebosoniccreationoperatoronanewtypeofsqueezedcoherentstate[FanHYandXiaoM1996Phys.Lett.A22081].Wefindthatitsnormalizationfactorisrelatedtosingle-variableHermitepolynomials.Furthermore,weinvestigateitsstatisticalproperties,suchasMandel’sQparameter,photon-numberdistribution,andWignerfunction.Thenonclassicalityisdisplayedintermsoftheintenseoscillationofphoton-numberdistributionandthenegativityoftheWignerfunction.

简介：Basedonarelativisticquarkmodelapproach,thetransitionpropertiesofthefirstnucleonresonance△(1232),andthecouplingconstantsgπNN,g△πNareinvestigated.Tvodifferentvaystoremovethecenterofmassmotionareconsidered.Theresultsoftherelativisticapproacheswithandwithoutcenterofmasscorrectionarecomparedwiththoseofnonrelativisticconstituentquarkmodel.Moreover,pionmesoncloudeffectonthesecalculatedobservablesisexplicitlyaddressed.Betterresultsareobtainedbytakingthepionmesoncloudintoaccount.

简介：Startingfromthevariableseparationsolutionobtainedbyusingtheextendedhomogenousbalancemethod,anewclassofcombinedstructures,suchasmulti-peakonandmulti-dromionsolution,multi-compactonandmultidromionsolution,multi-peakonandmulti-compactonsolution,forthe(2+1)-dimensionalNizhnik-Novikov-Veselovequationarefoundbyselectingappropriatefunctions.Thesenewstructuresexhibitnovelinteractionfeatures.Theirinteractionbehaviorisverysimilartothecompletelynonelasticcollisionsbetweentwoclassicalparticles.

简介：ThroughanisotropicAgovergrowthonthesurfaceofAunanobipyramids(AuNBPs),high-purityandsizecontrolledAgnanorods(Au/AgNRs)areobtainedbyasimplifiedpurificationprocess.ThediametersoftheAu/AgNRsaredeterminedbythesizeoftheas-preparedAuNBPs,andthelengthsoftheAu/AgNRsaretunableusingdifferentamountsofAgprecursorinthegrowthsolution.Surface-enhancedRamanscattering(SERS)studiesusingRhodamine-6G(R6G)asatestmoleculeindicatethattheAu/AgNRshaveexcellentsensingpotential.ThetunableopticalpropertiesandstrongelectromagneticeffectoftheAu/AgNRs,alongwiththeirsuperiorSERSsignalenhancement,showthatAu/AgNRsarepromisingforfurtherapplicationsinplasmonsensingandbiomoleculardetection.

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简介：在在一个抛物线的量点强壮联合的electric-LO声子的条件上，我们获得地面状态和第一激动的状态的eigenenergy，地面状态的特徵函数并且第一--由使用Pekar的变化方法的激动的状态类型。在量点的这个系统可以作为二水平的量system-qubit被采用。当电子处于地面的重叠状态时--并且第一激动的状态，我们获得电子密度的时间进化。库仑有约束力的参数上的电子的概率密度的关系和库仑有约束力的参数，经常的联合的electron-LO-phonon和监禁长度上的摆动的时期的关系被导出。

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简介：磁铁矿(Fe3有不同尺寸和形状的O4)nanoparticles被热分解方法综合。二条途径，非注射一个壶和热注射的方法，被设计详细调查生长机制。nanoparticles的尺寸和形状被调整先锋集中和持续时间时间决定，这被发现，它能好在我们的合成系统基于LaMer模型由机制解释了。monodisperseFe3O4nanoparticles从5nm有一条吝啬的直径到16nm，和形状进化从对球形三角形、立方。磁性是尺寸依赖者，和Fe3在关于在房间温度和最大的浸透磁化的5nm展览superparamagnetic性质的小尺寸的O4nanoparticles来临到78emu/g，而Fe3O4nanoparticles当直径增加到大约16nm时，开发铁磁性的性质。

简介：ThedetailedreactionpathwayandcokeformationmechanismoverPt/metaloxidenanoparticlesduringthesteamreformingofethanol（SRE）at300℃werestudied.ThecatalystswerepreparedbyincipientwetnessimpregnationmethodandwerecharacterizedwithCOpulsechemisorption,BETsurfacemeasurement,oxygenadsorption,ethanol-TPD,NH3-TPD,andTPO.TheSREactivityofthecatalystswithsteam/ethanolmolarratioof3/1wastestedusingacontinuousfixed-bedreactor.StronginteractionbetweenPtandsupportscauseslowerH2productiontemperaturesandnoC2H4formation,whileweakinteractionleadstoC2H4formationandstrongbondedCOonPtparticlesduringethanol-TPD.H2productionoverPt-basedcatalystsismainlyresultedfromthedecompositionanddehydrogenationofethanol,anddecarbonylationofacetaldehyde.Meanwhile,cokecanbeformedfromacetaldehyde,acetone,C2H4andCO.However,whentheinteractionbetweenPtandsupportsisweak,morecokeisformedespeciallyfromacetone,C2H4andCO.Whentheinteractionisstrong,nocokeformationisobservedduetohighoxygenstoragecapacityofthecatalyst.

简介：氧化物PbMn(SO4)的磁性2由通过SO4tetrahedra与对方一起连接了的MnO6octahedra组成了，很好在实验被学习。在这篇论文，我们探索了它的有趣电子并且有第一原则的计算的磁性。也就是，我们Mn离子高有的所有旋转的结果表演说S=5/2，并且在NN和NNN之间的磁性的couplings是antiferromagnetic，它与试验性的结果同意很好。而且，吃惊在NN和NNN之间的相互作用最优地与扩大H被解释的旋转交换结果

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