简介:Multilevelphotoncombinedwithbinarypulsepositionmodulation(BPPM)(Manchesterpulsedsignals),isintroducedinthisletter.Initially,errorprobabilityderivationandexplanationforfour-levelphotoncommunicationswiththatBPPMispresented.Next,the2-levelphotoncommunicationsmatchingwithBPPMisproposed.Forperformancecomparison,itisdonewiththattheconventionalschemebyfxingthebackgroundnoiseandalsoincreasingnumberofphotonperslot.Successfullywithapplyingconvolutionalcodingforsystemimproving,theproposedmultilevelphotononBPPMwiththiscodingschemeachieveshighergain.Finally,thisworkalsobeneftstoimprovingforfurtherperformancewhenconsideringwithmultilevelerrorcontrolcodingaswell.
简介:Thetop-pairproductioninassociationwithaZ~0-bosonataphoton-photoncolliderisanimportantprocessinprobingthecouplingbetweentop-quarksandvectorbosonanddiscoveringthesignatureofpossiblenewphysics.WedescribetheimpactofthecompletesupersymmetricQCD(SQCD)next-to-leadingorder(NLO)radiativecorrectionsonthisprocessatapolarizedorunpolarizedphotoncollider,andmakeacomparisonbetweentheeffectsoftheSQCDandthestandardmodel(SM)QCD.Weinvestigatethedependenceofthelowest-order(LO)andQCDNLOcorrectedcrosssectionsinboththeSMandminimalsupersymmetricstandardmodel(MSSM)oncollidingenergys~(1/2)indifferentpolarizedphotoncollisionmodes.TheLO,SMNLO,andSQCDNLOcorrecteddistributionsoftheinvariantmassoftt-pairandthetransversemomentaoffinalZ~0-bosonarepresented.OurnumericalresultsshowthatthepureSQCDeffectsinγγ→ttZ~0processcanbemoresignificantinthe++polarizedphotoncollisionmodethaninothercollisionmodes,andtherelativeSQCDradiativecorrectioninunpolarizedphotoncollisionmodevariesfrom32.09%to-1.89%whens~(1/2)goesupfrom500GeVto1.5TeV.
简介:InthisLetter,wepresentapossiblemethodologytodirectly'read'theforceonanatomviathephotonsemittedfromtheatom.Inthismethodology,themeanradiativeforceonanatomexertedbyexternalfieldscanbeexpressedasafunctionoftheaveragenumberofemittedphotonshNianditsderivativesviathegeneratingfunctionapproachdevelopedbyusrecently.
简介:Manynonlinearquantumopticalphysicsphenomenaneedmoreaccuratewavefunctionsandcorrespondingenergyorquasienergylevelstoaccountfor.AnanalyticexpressionofwavefunctionswithcorrespondingenergylevelsforanatomicelectroninteractingwithaphotonfieldispresentedasanexactsolutiontotheSchrSdinger-likeequationinvolvedwithbothatomicCoulombinteractionandelectron-photoninteraction.Thesolutionisanaturalgeneralizationofthequantum-fieldVolkovstatesforanotherwisefreeelectroninteractingwithaphotonfield.ThesolutionshowsthatanN-levelatominlightformstationarystateswithoutextraenergysplittinginadditiontotheFloquetmechanism.Thetreatmentdevelopedherewithcomputingcodescanbeconvenientlytransferredtoquantumopticsinclassical-fieldversionasresearchtoolstobenefitthewholephysicscommunity.
简介:A31kmlongrangedistributedopticalfiberRamanphotontemperaturesensor(DOFRPTS)systemhavebeendevelopedbasedontemperatureeffectoftheamplifiedspontaneousRamanscatteringinfiber,andusingfiberlaserasapumpedsource.Theresultsshowthattemperaturemeasuringuncertaintyis±2°C,temperatureresolutionis0.1°C,measurementtimeis432s,spatialresolutionislessthan4m.
简介:有效的氨兆兆赫(THz)洞激光试验性地被报导。不同于象洞couplers和独立网孔couplers那样的过去的设计计划,在我们的系统,输入和输出couplers被扔镍制作ZnSe和高抵抗力的硅底层上的电容的金属性的网孔。因此couplers能不仅作为一个F-P振荡器被构造而且能是封上更容易执行排列的调整与的窗户被使用。为了提高THz激光,输出精力和光子变换效率,象泵紧张那样的主导的因素和煤气的压力试验性地被调查。最后,有在1.09kPa操作的90m波长(3.33THz)的氨激光的1.35mJ兆兆赫放射与9R(16)由402mJ茶CO2激光抽了线被产生,并且6.5%的光子变换效率被完成。
简介:离子光子排放显微镜学(IPEM)是新导致离子的排放显微镜学。它与高精力和在一件样品上侵犯的低fluence率采用一根宽广离子横梁。一个单个离子的位置被一个光系统与联合的客观透镜,棱柱,显微镜试管和充电检测设备(电荷耦合器件)。与Ag离子做的一部薄ZnS电影被用作光材料。在照耀的Cl离子创造的ZnS(Ag)电影的光子的产生效率和传播效率是计算的。一个单个Cl离子光显微镜的图象被高量效率电荷耦合器件观察。在这个IPEM系统给的一个单个Cl离子的分辨率是6m。影响分辨率的几个因素被讨论。一根硅二极管被用来收集事件离子引起的电的信号。光图象和电子信号的有效、意外的巧合被说明。单个事件效果的一张二维的地图根据有效巧合的数据被抽出。
简介:Thephotonpolarizationtensorcarriesthefundamentalinformationofmagnetizedvacuumormedium[1{5].Acompletedescriptionofthevacuumpolarizationtensorisparticularlycomplicatedtoapproach,sincethevacuumphotonpolarizationtensorisexpressedintermsofadoublesummationofinfiniteserieswithrespecttotwoLandaulevelsoccupiedbyvirtualchargedparticles.MostworkswerefocusingonthestrongfiledlimitwithanassumptionofLowestLandauLevel(LLL)[2,6]InRef.[7]weobtainedafulldescriptionofvacuumpolarizationtensorinresponsetoalltheLandaulevelsatanyfieldstrengthofBforthefirsttimebeyondLLLapproximation,andwefoundoutthattheimaginarypartofthephotonpolarizationtensorξΠbecomesnonzeroatthetimelikemomentaregionQ2>4(M2+2neB)atT=0,i.e..,theLLLapproximationisanalyticallysatisfied[3,7].
简介:Inthispaper,wederivethebrightanddarkphotonnumberstatesforspatialinterferenceoftwoormorelightbeamsandsucceedintheexplanationofYoung'sinterferenceexperiment,andalsoachieveabettercomprehensionofthewellknowncommentofDirac"eachphotononlyinterferenceswithitself".Fromthefullyquantumpointofview,theoriginoftheinterferencefringesconsistsinthemodetransformationandthedetectionofdouble-slitstates.