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简介：Thermodynamicpropertiesandphasediagramsofamixedspin-(1,2)Isingferrimagneticsystemwithsingleionanisotropyonhexagonalnanowirearestudiedbyusingeffective-fieldtheorywithcorrelations.Thesusceptibility,internalenergyandspecificheatofthesystemarenumericallyexaminedandsomeinterestingphenomenainthesequantitiesarefound.TheeffectoftheHamiltonianparametersonphasediagramsareexaminedindetail.Besidessecond-orderphasetransition,linesoffirst-ordertransitionandtricriticalpointsarefound.Inparticular,wefoundthatforsomenegativevaluesofsingle-ionanisotropies,thereexistfirst-orderphasetransitions.

简介：Westudytheentanglementinanisotropic(1/2,1)mixed-spinHeisenbergXYmodelunderthepresenceofanexternalmagneticfieldatthermalequilibrium.Byadjustingtheanisotropicparameterandthemagneticfield,oneisabletoobtainentanglementathighertemperature.Wefindtheevidenceofthequantumphasetransitioninthemodelandobservethatthequantumphasetransitionpointatlowtemperaturemovestowardweakmagneticfieldwiththeincreaseoftheanisotropicparameter.

简介：我们在aquantum旋转网络的二平行1D旋转链调查纠纷转移，并且证明完美的纠纷转移能在somespecial时间被认识到。另外，“纠纷的现象在thespin被发现的所谓的突然的死亡”网络系统。

简介：Therearespin-orbitinteractionandspin-spininteractioninagenericpost-NewtonianLagrangianformulationofcomparablemassspinningcompactbinaries.Thespin-orbitcouplingorthespin-spincouplingplaysaquiteimportantroleinchangingtheevolutionofthesystemandmaysometimecausechaoticbehavior.Howdothetwotypesofcouplingsexerttogetheranyinfluencesonchaosinthisformulation?Toanswerit,wesimplytaketheLagrangianformulationofaspecialbinarysystem,includingtheNewtoniantermandtheleading-orderspin-orbitandspin-spincouplings.ThekeytothisquestioncanbefoundfromaHamiltonianformulationthatiscompletelyidenticaltotheLagrangianformulation.IftheLagrangiandoesnotincludethespin-spincoupling,itsequivalentHamiltonianhasanadditionalterm(i.e.thenext-orderspin-spincoupling)aswellasthosetermsoftheLagrangian.Thespin-spincouplingratherthanthespin-orbitcouplingmakestheHamiltoniantypicallynonintegrableandprobablychaoticwhentwoobjectsspin.Whentheleading-orderspin-spincouplingisalsoaddedtotheLagrangian,itstillappearsintheHamiltonian.Inthissense,thetotalHamiltoniancontainstheleading-orderspin-spincouplingandthenext-orderspin-spincoupling,whichhavedifferentsigns.Therefore,thechaosresultingfromthespin-spininteractionintheLegrangianformulationsissomewhatweakenedbythespin-orbitcoupling.

简介：Ingeneralrelativity,theequationofmotionofthespinisgivenbytheequationofparalleltransport,whichisaresultofthespace-timegeometry.Anyresultofthespace-timegeometrycannotbedirectlyappliedtogaugetheoryofgravity.Ingaugetheoryofgravity,basedontheviewpointofthecouplingbetweenthespinandgravitationalfield,anequationofmotionofthespinisdeduced.InthepostNewtonianapproximation,itisprovedthatthisequationgivesthesameresultasthatoftheequationofparalleltransport.So,inthepostNewtonianapproximation,gaugetheoryofgravitygivesoutthesamepredictionontheprecessionoforbitinggyroscopeasthatofgeneralrelativity.

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简介：Theground-stateandthermodynamicpropertiesofquantummixed-spinchainsof1/2-1/2-1-1and3/2-3/2-1-1areinvestigatedbyaquantumMonteCarlosimulationwiththeloop-clusteralgorithm.For1/2-1/2-1-1chain,wefindithastwophasesseparatedbyanenergy-gapvanishingpointintheground-state.For3/2-3/2-1-1chain,thenumericalresultsshowtwoenergy-gapvanishingpointsisolatedbydifferentphasesinitsground-state.Ourcalculationsindicatethatallthesegroundstatephasescanbeunderstoodbymeansofvalence-bond-solidpicture,andthethermodynamicbehavioratfinitetemperaturesiscontinuousasafunctionofparameterα=J2/J1.

简介：Atemperature-inducedspinreorientationtransitionbetweenГ4(Gx,Ay,Fz)andГ2(Fx,Cy,Gz)hasbeenstudiedinthefamilyofEr1–xYxFeO3(x=0,0.25,0.5,0.75,1)singlecrystals.BydopingnonmagneticY3+,wetunedthespinreorientationtemperaturetolowtemperaturewithincreasingx.Moreover,thetypicalcompensationpointandspinfliptransitionofErFeO3alsodecreaseswithdoping,anddisappearsabovex=0.75.WealsoreporttheRietveldrefinementsandRamanspectroscopyofEr1–xYxFeO3,wheresomeRamanpeaksareshiftedtolowfrequencywithincreasingdoping.Ourresultsshedlightontheunderstandingoftheinteractionbetweentwomagneticsub-latticesofrareearth(R3+)andiron(Fe3+)ions,andwillalsocontributetothematerialsdesignandpotentialapplications.

简介：我们在场氮空缺(NV)的试验性的结果电子旋转decoherence，被连接到氮杂质(P1中心)和1313为type-IIa的C原子旋转洗澡钻石。一般来说，从两旋转洗澡的热变化能被Hahn回响顺序消除，导致一长连贯时间(大约400s的T2)。然而，在在哪儿的一颗高纯净的type-IIa钻石13C原子旋转洗澡是主导的decoherence来源，NV电子旋转T2时间的戏剧的减少由P1电子旋转洗澡引起了在某些磁场下面被观察。我们进一步使用设计Hahn回响顺序证实多重旋转洗澡和份量上估计的decoherence机制P1电子纺纱的贡献洗澡。我们的结果是有用的理解NVdecoherence机制，它将有益于量计算和量计量学。

简介：扩大电子的一个模型是适合描述经由扫描掘显微镜获得的理论模拟和试验性的结果的更多，这被发现了，但是当动态性质容易被合并时，磁性，并且特别地电子旋转性质当测量不在时由于他们的构思的isotropy提出一个问题。一个电子的旋转与一个磁场反应并且因此有向量的性质。然而，电子纺纱也是各向同性的，建议它没有向量的性质。在对电子旋转的描述的这中央冲突，我们相信，矛盾的性质的许多的根为量旋转粒子被测量并且要求。利用电子旋转在真实三维的空间一致地在被描述的一个模型--一个扩大电子模型--我们证明纺纱可以被向量描述并且仍然维持它的isotropy。在这个框架，我们重新估计连续大小的Stern-Gerlach实验，Einstein-Podolsky-Rosen实验，和效果并且在所有情况中发现相当直觉的解释。

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简介：Asupramolecular1Dferromagneticsystemwasstudiedexperimentallyaswellastheoretically.Hybriddensityfunctionaltheory(DFT)calculationswerebasedontheX-rayanalysis.TheresultsofDFTcalculationsandMcConnellmechanismhavecontributedtotheunderstandingofthefactorsgoverningtheexchangecouplingofmagnetisminthecrystalpacking.Boththeexperimentalevidenceandtheoreticalcalculationindicatethatspindensityin2-iodonitronylnitroxide(INN)radicalsconfirms1Dferromagneticchainwithinter-chainantiferromagneticinteraction.

简介：WehavecomprehensivelyinvestigatedthefrustratedJ1-J2-J3Heisenbergmodelonasimplecubiclattice.Thismodelallowsthreeregimesofmagneticorder,viz.,(π;π;π),(0;π;π)and(0;0;π),denotedasAF1,AF2,andAF3,respectively.Theeffectsoftheinterplayofneighboringcouplingsonthemodelarestudiedintheentiretemperaturerange.Thezerotemperaturemagneticpropertiesofthismodelarediscussedutilizingthelinearspinwave(LSW)theory,nonlinearspinwave(NLSW)theory,andGreen’sfunction(GF)method.ThezerotemperaturephasediagramsevaluatedbytheLSWandNLSWmethodsareillustrated,andareobservedtoexhibitdifferentparameterboundaries.Incertainregionsandalongtheparameterboundaries,thepossiblephasetransformationsdrivenbytheparametersarediscussed.TheresultsobtainedusingtheLSW,NLSW,andGFmethodsarecomparedwiththoseobtainedusingtheseriesexpansion(SE)method,andareobservedtobeingoodagreementwhenthevalueofJ2isnotclosetotheparameterboundaries.ThegroundstateenergiesobtainedusingtheLSWandNLSWmethodsareclosetothatobtainedusingtheSEmethod.Atfinitetemperatures,onlytheGFmethodisemployedtoevaluatethemagneticproperties,andthecalculatedphasediagramisobservedtobeidenticaltotheclassicalphasediagram.Theresultsindicatethatattheparameterboundaries,atemperature-drivenfirst-orderphasetransitionbetweenAF1andAF2mayoccuralongtheboundaryline.AlongtheAF1-AF3andAF2-AF3boundarylines,AF3islessstablethanAF1andAF2.OurcalculatedcriticaltemperatureagreeswiththatobtainedusingMonteCarlosimulationsandpseudofermionfunctionalrenormalizationgroupscheme.

简介：这篇文章介绍我们unpolarized强子的旋转结构的现在的理解的评论。特别注意在带对夸克部门被给予也就是，扭曲夸克BoerMulders功能，它在unpolarized强子内描述夸克的横向的极化。在介绍BoerMulders函数的操作符定义以后，BoerMulders函数的不同non-perturbative计算的一个详细处理被提供。包括从试验性的数据的夸克和反夸克BoerMulders函数的抽取，在DrellYan进程和半包括的leptoproduction的现象学包括地被介绍。最后，为未来勘探理论研究和试验性的大小简言之被介绍。

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简介：BasedonthetheoryofgravitationwithtorsiondevelopedbyHammond[Rep.Prog.Phys.65(2002)599],theinteractionbetweentheintrinsicspinofaparticleandthemasssourceiscalculated.Itisshownthatspincaninteractwiththegravitimagneticfieldcreatedbyarotationalmass,wherethespin-rotationcouplingisalsodiscussed.AccordingtotherecenttorsionpendulumexperimentwithpolarizedelectronsbyHeckeletal.[Phys.Rev.Lett.97(2006)021603],wesetanewlimitonthevalueofthetorsioncouplingconstantKasK∈[0.53,0.95],whichhasimprovedmanyordersthantheconstraintsfromtheearlyspin-spinexperimentwithK<2×10~(14).