简介:WedescribetheestablishingprocessfortheBoson-FermionalgebraofOSP(1,2)startingfromthefundamentalWigneroperatorsofOSP(1,2),andstudyitsstructuréfeatureandrepresentationtheory.WealsogivetheBoson-FermionrepresentationofOSP(1,2),whichisaninfinitedimensionalandgradestarrepresentation
简介:Inthispaper,byapplyingasimplifiedversionofLieb'sspin-reflection-positivitymethod,whichwasrecentlydevelopedbyoneofus[G.S.TianandJ.G.Wang,J.Phys.A:Math.Gen.35(2002)941],weinvestigatesomegeneralpropertiesoftheboeon-fermionHamiltonlan,whichhasbeenwidelyusedasaphenomenologicalmodeltodescribethereal-spacepairingofelectrons.Onamathematicallyrigorousbasis,weprovethatforeithernegativeorpositivecoupingV,whichrepresentsthespontaneousdecayandrecombinationprocessbetweenbosonandfermioninthemodel,thepairingenergyofelectronsisnonzero.Furthermore,wealsoshowthatthespin-excitationgapoftheboson-fermionHamiltonianisalwayslargerthanitschargedgap,aspredictedbythepre-palredelectrontheory.
简介:<正>HomogeneousandinhornogeneousdifferentialrealizationsoftheOSP(2,1)superalgebraonthespacesofhomogeneousandinhomogeneouspolynomialsandthecorrespondingboson-fermioiirealizationsarestudied.ThenewindecomposableandirreduciblerepresentationsoftheOSP(2,1)aregivenonsubspacesandquotientspacesoftheuniversalenvelopingalgebrasofHeisenberg-Weylsuperalgebra.AllthefinitedimensionalirreduciblerepresentationoftheOSP(2,1)superalgebraisnaturallyobtainedasspecialcases.
简介:由最近的伦敦穿入深度大小激发了[H。Kim,等,Phys。加快。Lett。114,027003(2015)]并且新奇合成配对情形[O。Erten,R.弗林特,和P.科尔曼,Phys。加快。Lett。114,027002(2015)]做Yb的重费米子超导体CeCoIn5,,我们在显微镜的重费米子格子模型重游超流体反应的问题。从文学,然而,为在重费米子超导体的超流体反应函数的一个明确的表达式是稀罕的。在这份报纸,我们在庆祝Kondo-Heisenberg模型调查超流体密度反应功能。特定,我们从有效fermioniclarge-N导出相应形式主义谁的吝啬地的配对Hamiltonian配对相互作用被假定从有效本地antiferromagnetic交换相互作用发源。有趣地,我们发现身体上正确,如果外部电磁的地直接被联合到重费米子伪粒子而非赤裸的传导电子或本地时刻,温度依赖者超流体密度公式能仅仅被获得。如此的一个唯一的特征为low-temperature/energy热力学和运输行为强调Kondo-screening-renormalized重伪粒子的关键角色。作为重要应用,理论结果与在重费米子超导体CeCoIn5和做Yb的Ce1xYbx有相当好的同意和在后者材料的配对的对称的转变的硬币5作为简单的做效果被解释。另外,为通常遇到的无磁性的杂质的需要的形式主义和非局部的电力学的效果被开发。在向经典115系列解释重费米子超导体由成功启发了,我们期望现在的理论将被使用理解象CeCu2Si2和更通用的多乐队超导体。
简介:InthispaperweproposeapossibleexplanationtotheFermionmasshierarchyproblembyfittingthetype-IIseesawmechanismintotheHiggsdoubletsector,suchthattheirvacuumexpectationvaluesarehierarchal.WeextendtheStandardModelwithtwoextraHiggsdoubletsaswellasaspontaneouslybrokenUX(1)gaugesymmetry.AllthefermionYukawacouplingsexceptthatofthetopquarkareofO(10~(-2))inourmodel.Constraintsontheparameterspaceofthemodelfromlowenergyprocessesarestudied.Besides,thelightestoneoftheneutralfermionfields,whichisintroducedtocanceltheanomaliesoftheU(1)Xgaugesymmetrycanbethecolddarkmattercandidate.Weinvestigateitssignatureinthedarkmatterdirectdetection.
简介:Wereportonanunexplainedhighstatisticssignalthatmayindicatetheexistenceofasuperlightscalarboson[1].Thequestionwhetherthereexistsa(scalar)bosonwithamassofabout38MeVdoesnotdependexclusivelyontheexistenceofaresonance-likestructure(Fig.1)intheexperimentaldataofRef.[2],yetitisatpresenttheclearestsignalwehavefoundinmanyexperiments.
简介:WestudyspectroscopicsignaturesofamonochromaticbosonmodeinteractingwithaT-shapedoublequantumdotcoupledbetweenthemetallicandsuperconductingleads.Focusingonaweakinterdotcoupling,wefindthattheproximityeffecttogetherwiththebosonicmodeareresponsiblefortheseriesofFano-typeresonancesappearingsimultaneouslyatnegativeandpositiveenergies.WeinvestigatetheseinterferometricfeaturesanddiscusstheirinfluenceonthesubgapAndreevconductancetakingintoaccountthecorrelationeffectsdrivenbytheCoulombrepulsion.
简介:Inthecontextoftopcolor-assistedtechnicolor(TC2)model,westudythechargedandneutraltop-pionsproductionprocessγγ→W~+П_t~-П_t~0.Wefindthattheproductioncrosssectionislargerthanthatoftheprocessγγ→W~+H~-Hintheminimalsupersymmetricstandardmodel.WithreasonablevaluesoftheparametersintheTC2model,thecrosssectioncanreachthelevelofafewfb.Furthermore,theflavor-changing(FC)decaymodeП_t~0→tcisthebestchanneltodetecttheneutraltop-pionduetothecleanSMbackground.Withalargenumberofeventsandthecleanbackground,theneutraltop-pionshouldbeobservableatfuturelinearcollidersoperatinginγγmodeattheTeVenergyscale.
简介:在这篇文章,我们在二维的强烈相关的费米子系统在量阶段转变上考察我们的最近的工作。我们由用细胞的动态吝啬地的理论(CDMFT)和连续时间的量蒙特卡罗算法的联合计算状态,两倍占有,和费密表面进化的密度讨论这些系统的metalinsulator转变性质。而且,我们由定义磁性的顺序参数探索每个状态的磁性。包括antiferromagnetic金属,顺磁的金属,Kondo金属,和铁磁性的绝缘体,有许多吸引人的量状态的富有的阶段图被作出对有利的裁决有强烈相关的费米子的二维的格子。我们相信我们的结果将导致真实材料的性质的更好的理解。
简介:ThemagneticpropertiesofCeRhln5arestudiedbyfirst-principlescalculation.Spin-orbitcouplingisconsideredaswellasdifferentcorrectionsincludinglocaldensityapproximationpluson-siteCoulombinteractionU(U=1,1.5,3eV)andorbitalpolarization.TheresultsshowtheexistenceofonlymoderatecorrelationinCeRhln5andCe-4felectronsareontheborderoflocalizationanditinerancy.Theeffectofpressurebychangingthevolumeoftheunitcellisalsostudied.
简介:Wehaveinvestigatedthelow-lyingcollectivestatesandelectromagnetictransitionsin94Mowithintheframeworkoftheinteractingbosonmodel.Theinfluenceofmodelparametersontheenergylevelsandelectromagneticpropertieshasbeeninvestigated.Theanalysisoftheobtainedresultsandtheparametervaluespredictthatthe23+stateisthelowestmixedsymmetrystatewithpureF=Fmax-1inthisnucleus.Thecalculatedresultspredicatethatthe25+(two-Q-phonon)mixedsymmetrystateisclosedtotheJ=2+at2.870MeVintheexperimentaldata,andthe2.965MeVstateisthelowestmixedsymmetrywithJ=3+.
简介:周期的安德森模型(PAM)与巡回的电子搬运人,一起的本地电子orbitals相互影响在我们重费米子材料的理解起一个必要作用。由为以碱地球的金属原子模仿Kondo格子模型(KLM)的最近的建议激发了,我们向PAM的模拟采取另一项措施,它在KLM在完全低精力的旋转变化以外包括本地f电子的关键费用/原子价变化。认识到PAM,转变由合适的激光在之间导致了电子激动并且碱地球的金属原子的地面状态(1S03P0)被介绍。这在PAM导致在本地电子和传导电子之间的有效杂交。通常,PAM的苏(N)版本能被我们的建议认识到,它给一个唯一的机会没有复杂性,在现实主义的材料检测large-N物理。在现在的工作,标准的高温度的物理特征[苏(2)]有套住潜力的泛音的PAM被量蒙特卡罗和动态吝啬地的理论分析,在Mott/orbital-selective莫特状态被发现与金属性的状态共存的地方。为近未来的实验的指示被提供。我们期望我们的理论建议并且(希望)即将来临的实验将加深我们重费米子系统的理解。同时,我们希望这些将在两个在相关莫特物理,量criticality,和重要拓扑学上触发进一步的研究不同类并且nonequilibrium领域。
简介:WithintheframeworkoftheUsdpf(16)interactingbosonmodel(IBM),theeffectsofstrongcorrelationsofthedipole(p--boson)andtheoctupole(f--boson)degreeoffreedomonthepositive-paritystatesofeven-evennucleiinSU(3)limitarediscussed.Itisshownthatconfigurationsofanevennumberofmanyp-andf-bosonscannotonlybeincorporatedintotheusuallow-lyingcollectiverotationalbands,suchasthegroundstateband,β-andγ-vibrationalbands,butalsonaturallyformtheKπ=1+,3+rotationalbands,etc.TheseresultsaresimilartothatofUsdg(15)-IBMandinagreementwellwiththeexperimentaldataofthe17672Hf104nucleus.Besides,severalintrabandE2transitionprobabilitiesaregiven,whichareconsistentwiththatofUsd(6)-IBM.
简介:我们揭示并且解释thermopowerS/T的可伸缩的行为展出了由典型重费米子(HF)金属YbRh2在在温度T的磁场B的申请下面的Si2。我们证明一样的可伸缩被不同HF混合物例如表明?-YbAlB4和强烈相关的分层的钴氧化物[BiBa0.66K0.36O2]CoO2。用YbRh2是的Si2一个例子,,我们证明S/T的可伸缩的行为在antiferromagnetic阶段转变被违背剩余抵抗力0和状态的密度,N,经验在阶段转变跳,引起thermopower做二跳并且改变它的符号。我们的说明基于深刻地影响0和N的单个粒子的光谱变平。描绘S/T行为的主要特征,我们构造TBYbRh2Si2。我们为HF混合物的计算S/T在对试验性的事实的好同意并且支持我们的观察。
简介:Inatwocomponentfermionsystem,themismatchedFermisurfacespreventtheformationofCooperpairsbetweenthetwospicesneartheiraverageFermisurface.Ourpreviouswork[1]hasshownthattheangledependenceofthenons-wavepairinggapcanreducetheeffectofthedifferenceμbetweentheFermisurfacesoftwospicesinasymmetricnuclearmatter.Ontheotherhand,intheheavyfermionsuperconductors,suchasCeCoIn5pressuredCeRhIn5NpPd5Al2andTl-basedcuprates,mayhaveacoupleofcommonfeatures,forexample,thed-wavepairingandastrongparamagneticeffect(thedifferenceofthetwoFermisurfacesμ).Therefore,theangledependenceofthepairinggapmayhavesignificantinfluenceinthesesystems.