简介：在量interferometry，为高精确的大小的成就控制并且利用非线性的相互作用是重要的。由于他们的长连贯时间和高可控制性，包括Bose的ultracold原子压缩了原子广泛地为量interferometry被使用了。这里，我们与Bose在量interferometry的理论研究考察最近的进步压缩原子。特别地，我们集中于原子原子相互作用导致的非线性的现象，并且怎么控制并且利用这些非线性的现象。与吝啬地的描述，由于原子原子相互作用，事波浪solitons出现在干扰模式，和宏观的量自我套住在Bose-Josephson连接存在。与许多身体描述，原子原子相互作用能产生非古典的纠纷，它能被利用在标准量限制以外完成高精确的大小。

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简介：Thenonradiativecharge-transfercrosssectionsforprotonscollidingwithRb(5s)atomsarecalculatedbyusingthequantum-mechanicalmolecularorbitalclose-couplingmethodinanenergyrangeof103keV-10keV.Thetotalandstate-selectivecharge-transfercrosssectionsareingoodagreementwiththeexperimentaldataintherelativelylowenergyregion.Theimportanceofrotationalcouplingforchargetransferprocessisstressed.Comparedwiththeradiativecharge-transferprocess,nonradiativechargetransferisadominantmechanismatenergiesabove15eV.Theresonancestructuresofstate-selectivecharge-transfercrosssectionsarisingfromthecompetitionamongchannelsareanalysedindetail.Theradiativeandnonradiativecharge-transferratecoefficientsfromlowtohightemperaturearepresented.

简介：InthisLetter,wepresentapossiblemethodologytodirectly'read'theforceonanatomviathephotonsemittedfromtheatom.Inthismethodology,themeanradiativeforceonanatomexertedbyexternalfieldscanbeexpressedasafunctionoftheaveragenumberofemittedphotonshNianditsderivativesviathegeneratingfunctionapproachdevelopedbyusrecently.

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简介：Aone-dimensionalfluidmodelforhomogeneousatmosphericpressurebarrierdischargesinheliumispresentedbyconsiderilagelementaryprocessesofexcitationandionizationincludingametastableatomeffect.Usingthismodelweinvestigatethebehavioursoftheheliummetastableatomsindischargesaswellastheirinfluenceonthedischargecharacteristics.Itisshownthatthemetastableatomswitharelativelyhighconcentrationduringthedischargearemainlyproducedintheactivephaseofthedischargeanddissolvedintheoffphase.Itisalsofoundthatthemetastableatomcollisionscannotonlyprovideseedelectronsfordischargesbutalsoinfluencetheconcentrationofions.Areductionofmatestableatomdensityresultsinadropinthechargedparticledensitiesandcausesaqualitativechangeinthedischargepatterns.

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简介：Thispaperstudiestheentanglementpropertiesinasystemoftwodipole–dipolecoupledtwo-levelatomsresonantlyinteractingwithasingle-modethermalfield.Theresultsshowthat,whenthetemperatureofthecavityishighenough(correspondingtothelargevalueofthemeanphotonnumber),theentanglementisgreatlyenhancedduetotheinitialatomiccoherence.Theseresultsarehelpfulforcontrollingtheatomicentanglementbychangingtheinitialparametersofthesystem.

简介：Theinteractionsofstrong-fieldfew-cyclelaserpulseswithmetastablestatesofnoblegasatomsareexamined.Metastablenoblegasatomsofferacombinationoflowionizationpotentialandarelativelysimpleatomicstructure,makingthemexcellenttargetsforexaminingionizationdynamicsinvaryingexperimentalconditions.Areviewofthecurrentworkperformedonmetastablenoblegasatomsispresented.

简介：TheeffectivetheoryforthehierarchicalfractionalquantumHall(FQH)effectisproposed.WealsoderivethetopologicalnumbersKmatrixandtvectorandthegeneraledgeexcitationfromtheeffectivetheory.OnecanfindthatthetwoissuesinrapidlyrotatingultracoldatomsaresimilartothoseinelectronFQHliquid.

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简介：WeinvestigatereactivefluorineatomspectroscopiccharacterizationinatmosphericpressureofHe/SF6plasmausingatomicemissionspectrometry.Asinputradiofrequency(RF)powerlevelsareraisedfrom140to220W,theemissionspectraof685.60(3p4D→3s4Ptransition)and739.87nm(3p4P→3s4Ptransition)increasesignificantly.Moreover,anoptimalvalueofSF6volumeconcentrationintheproductionoffluorineradicals,whichis0.8%isachieved.AdditionofcertainamountsofO2intoHe/SF6plasmaresultsinthepromotionofSF6dissociation.EmissionintensitiesoffluorineatomsshowthemaximumattheO2/SF6ratioof0.4.

简介：Usingtherecentlydevelopedfinite-basis-setmethodwithBsplines,excitedstatesofHatomsinamagneticfieldhavebeencalculated.Energylevelsarepresentedforthetenexcitedstates,2s_0,3d′_0,3p_0,3d_(-1),3d_(-1),4d_(-1),3d_(-2),4d_(-2),4f_(-2),and5f_(-2)asafunctionofmagneticfieldstrengthswitharangefromzeroupto2.35×10~6T.Theobtainedresultsarecomparedwithavailablehighaccuracytheoreticaldatareportedintheliteratureandfoundtobeinexcellentagreement.Thecomparisonalsoshowsthatthecurrentmethodcanproduceenergylevelswithanaccuracyhigherthantheexistinghighaccuracymethod[Phys.Rev.A54(1996)287].Herehighaccuracyenergylevelsareforthefirsttimereportedforthe3d′_0,4d_(-1),4d_(-2),4f_(-2),and5f_(-2)states.

简介：WesuggesttwoschemestogeneratetheWstateofNA-typethree-levelatoms.Intheschemes,identicalNthree-levelatomsaretrappedinacavityorNdistantcavities.ThesuccessorfailureofthegenerationoftheWstatecanbedeterminedbydetectingthepolarizationofphotonleakingoutofthecavity.TheresultdemonstratesthattheWstateisfreefromboththecavitylossandthespontaneousemissionduetothefactthatthetwogroundstates(leftandright)ofthethree-levelatomsarestablestates(ormetastablestates).

简介：BycombiningtheB-splinebasissetwithmodelpotential(B-spline+MP),wepresentoscillatorstrengthspectraofRydbergLiatomsinexternalfields.Thephotoabsorptionspectraareanalyzed.Overthenarrowenergyrangesconsideredinthispaper,thestructureofthespectracanbeindependentoftheinitialstatechosenforagivenatom.Ourresultsareingoodagreementwithprevioushigh-precisionexperimentaldataandtheoreticalcalculations,wheretheR-matrixapproachtogetherwithmultichannelquantumdefecttheory(R-matrix+MQDT)wasused.ItissuggestedthatthepresentmethodscanbeappliedtodealwiththeoscillatorstrengthspectraofRydbergatomsincrossedelectricandmagneticfields.

简介：TheadsorptionanddiffusionofNatomsonthethreelow-indexCuplaneswerestudiedusing5-parameterMorsepotential(5-MP)method,andthebesttheory-experimentagreementwasobtained.NatomsofCu(100)surfacesitonthefourfoldhollowsitewiththeverticalheightof0.018nmcloselycoplanarwiththetopmostcopperlayer,andthefourCu-Nbondlengthsare0.182nmandthefifthCu-Ndistanceis0.199nm.ForCu(111)system,theexistenceofaberrantCu(100)reconstructedstructureisapprovedathighercoverage,andatlowcoveragethestructureisalmostanidealCu(111)surfacestructure.WithrespecttoCu(110)system,theNatomsareadsorbedatLBandH3sites,notatSBsite.ThediffusionpassageanddiffusionbarrierofadsorbedNatomswerealsostudied.

简介：Inthisresearch,alucunaryKegginstructure,[PMo2W9O39]7-wasselectedasanefficienthomogenouscatalystfordegradationofanazodye（directblue71）andasimplemethodwasdevelopedfordegradationofDB71.ThemethodisbasedontheoxidationofazodyeinthepresenceofalucunaryKegginformofpolyoxometalates,K7[PMo2W9O39]?19H2O,asahomogenouscatalystatroomtemperature.Thereactionismonitoredspectrophotometricallybymeasuringtheabsorbanceofdyeatλ=585nm.Someparametersincludingconcentrationofcatalyst,concentrationofH2O2,pHandreactiontimewereinvestigatedandoptimized.ResultsshowthatK7[PMo2W9O39]?19H2Oismoreefficientinthepresenceofhydrogenperoxide.DegradationofdyeinthepresenceofthecatalystandH2O2couldleadtothedisappearanceapproximately65%ofdyeafter60min.ButdegradationforthesameexperimentperformedintheabsenceofcatalystorintheabsenceofH2O2was22%or5%respectively.Approximately87%azodyeshasbeeneliminatedafter90mininthepresenceofcatalyst,H2O2andoptimizeconditions(0.6g/LofK7[PMo2-W9O39H9H2O,0.08mol/Lhydrogenperoxideandroomtemperature).

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