学科分类
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60 个结果
  • 简介:原子磁性的时刻是一个重要物理变量并且为原子模型的紧测试用作一个有用工具。为过去的十年,功能的理论和它的延期被证明了在描述原子地面状态成功并且激动的covariant密度说性质。然而,一个长期的问题是它的失败预言磁性的时刻。这篇文章在covariant密度以内在对原子磁性的时刻的描述考察最近的进步功能的理论。特别地,磁性的时刻球形奇怪--有二倍地关上的壳核心加或减一个核子的A原子核并且使变形奇怪--一原子核。

  • 标签: 原子模型 磁性 密度 物理变量 原子核 核子
  • 简介:WeprovideanewexpressionofthequantumFisherinformation(QFI)forageneralsystem.Utilizingthisexpression,theQFIforanon-fullrankdensitymatrixisonlydeterminedbyitssupport.Thisexpressioncanbringconvenienceforaninfinite-dimensionaldensitymatrixwithafinitesupport.Besides,amatrixrepresentationoftheQFIisalsogiven.

  • 标签: Fisher信息 密度矩阵 矩阵的秩 量子 通用系统 矩阵表示
  • 简介:TheAtomicWeaponsEstablishment(AWE)istaskedwithsupportingContinuousAtSeaDeterrence(CASD)bycertifyingtheperformanceandsafetyofthenationaldeterrentintheComprehensiveTestBanTreaty(CTBT)era.Thismeansthatrecoursetofurtherundergroundtestingisnotpossible,andcertificationmustbeachievedbysupplementingthehistoricaldatawiththeuseofcomputercalculation.Inordertofacilitatethis,AWEoperatessomeofthelargestsupercomputersintheUK.Tovalidatethecomputercodes,andindeedthedesignerswhoareusingthem,itisnecessarytocarryoutfurtherexperimentsintherightregimes.Anexcellentwaytomeetmanyoftherequirementsformaterialpropertydataandtoprovideconfidenceinthevalidityofthealgorithmsisthroughexperimentscarriedoutonhighpowerlaserfacilities.

  • 标签: HIGH energy density PHYSICS HEDP HIGH
  • 简介:IntheGCMwestudysomepropertiesofπmesonastheGoldstonebosonsinanuclearmatterwithfinitedensity.Usingtheeffectiveactioninanuclearmatter,wecalculatethedecayconstantandπmassasfunctionsofthechemicalpotential.Therelationbetweenthechemicalpotentialandthedensityofanuclearmatterisfirstlygivenhere.Wefindthatfπandmπmonotonouslydecreaseasnuclearmatterdensityincreases.Theresultisconsistentwiththeusualassumptionthatthechiralsymmetryisgraduallyrestoredasthedensityofanuclearmatterincreases.

  • 标签: 原子核物质 π介子性质 核物质有限密度
  • 简介:Transformationacousticsareconcentratedforthepurposeofdesigningnovelacousticdevicestotailoracousticwavestoachievedesirablecharacteristics.However,thesedevicesrequirefluidorfluid-likematerialswithananisotropicdensitythatgenerallydoesnotexistinnature.Therefore,weintroducepentamodemetamaterialsintoanalternatingmultilayerisotropicmediummodeltobuildfluid-likemetamaterialswithananisotropicdensity.A2Dacousticbendingbasedontransformationacousticsisestablishedandinvestigatedtoverifyourmethod.Thisideaprovidesamethodtodesignbroadbandandphysicallyrealizableacousticmetamaterialswithananisotropicdensityandismeaningfulforthedesignofacousticmetamaterials.

  • 标签: Physically Realizable BROADBAND ACOUSTIC METAMATERIALS with
  • 简介:为在curvedspacetime的量信息密度(QID)的一个动态方程被介绍。有量爱因斯坦方程的QID的相关变化是alsodiscussed,它揭示用aGaussian量隧道测量动态相互的信息条件。

  • 标签: 量子信息密度 时空观念 脉冲 量子力学
  • 简介:Thispaperpresentsanewmethodtocontrolthepositionofamicro-columnsnowtarget.Thistargetenablesthemeasurementofthemeanelectrondensityofthepre-plasmacreatedbyapre-pulsewithdifferenttimedelays.Thisresearchwillallowabetterunderstandingofthegenerationoffastprotonsfromtheinteractionbetweenastructuredpre-plasmaandahighintensitylaser.

  • 标签: high INTENSITY LASERS plasma PROTON ACCELERATION
  • 简介:Recentresearchactivitiesrelevanttohighenergydensityphysics(HEDP)drivenbytheheavyionbeamattheInstituteofModernPhysics,ChineseAcademyofSciencesarepresented.RadiographyofstaticobjectswiththefastextractedhighenergycarbonionbeamfromtheCoolingStorageRingisdiscussed.Investigationofthelowenergyheavyionbeamandplasmainteractionisreported.WithHEDPresearchasoneofthemaingoals,theprojectHIAF(HighIntensityheavy-ionAcceleratorFacility),proposedbytheInstituteofModernPhysicsasthe12thfive-year-planofChina,isintroduced.

  • 标签: heavy ION BEAM high energy density
  • 简介:ThisworkpresentsanopticalmethodusingtheMach–Zehnderinterferometer.Weespeciallydiagnoseapurenitrogengassubjectedtoapointtoplanecoronadischarge,andvisualizethedensityspatialmap.Theinterelectrodedistanceequals6mmandthevariationoftheopticalpathhasbeenmeasuredatdifferentpressures:220Torr,400Torr,and760Torr.TheinterferogramsarerecordedwithaCCDcamera,andthenumericalanalysisoftheseinterferogramsisassuredbytheinverseAbeltransformation.ThenitrogendensityisextractedthroughtheGladstone–Dalerelation.Theobtainedresultsareincloseagreementwithvaluesavailableintheliterature.

  • 标签: 氮密度 干涉仪 马赫 映射 CCD摄像机 逆阿贝尔变换
  • 简介:Wecalculatethetwo-pioncorrelationfunctionforanexpandinghadronsourcewithafinitebaryondensity.Thespace-timeevolutionofthesourceisdescribedbyrelativistichydrodynamicsandtheHanbury-Brown-Twiss(HBT)radiusisextractedaftereffectsofcollectiveexpansionandmultiplescatteringontheHBTinterferometryhavebeentakenintoaccount,usingquantumprobabilityamplitudesinapath-integralformalism.WefindthatthisradiusissubstantiallysmallerthantheHBTradiusextractedfromthefreeze-outconfiguration.

  • 标签: 有限重子密度 介子干涉量度学 玻色-爱因斯坦相关 Hanbury-Brown-Twiss效应 粒子物理学
  • 简介:交往的费米子的统计性质与配对相互作用的包括为各种各样的尖动量被学习了。为几个原子核的尖动量上的批评温度的依赖,被学习了。是的年著名计算机生产厂商精力为~(28)的尖动量的功能Si和~(24)Mg原子核被计算了直到刺激精力的60.0兆电子伏。计算限制尖时刻一与艾尔由~(12)生产了的~(26)的试验性的结果相比C+~(14)N反应。为non-zeroangular动量的相关原子水平密度为~(44)被计算了Ti和~(136)Ba原子核。结果与他们从近似公式获得的相应价值相比。

  • 标签: 核结构 对核子统计性 角动量 临界温度
  • 简介:电子温度和电子数字密度是在血浆的描述的重要参数。在电子温度和土壤血浆的电子数字密度由激光产生了的这份报纸,脱离在不同分泌物电压与毫微秒分泌物火花结合了被学习了。Saha-Boltzmann阴谋并且空拓宽被用来决定温度和电子数字密度。本地热平衡在毫微秒火花被完成,这被证明提高的血浆。提高的光排放,到噪音比率的信号和以在不同火花电压的信号紧张的相对标准差的稳定性详细被调查。一个相对稳定的分泌物过程在带的试验性的配置下面与10kV分泌物电压的使用被观察。

  • 标签: 土壤温度 电子密度 等离子体 Stark加宽 电子数密度 放电电压
  • 简介:Inthispaper,thecalculatingmethodoftheplasmaelectrondensitybasedontheHCNwaveformdataisintroduced.ThewaysdecidingthebasevoltageandthephasezerocrosspointsoftheHCNsignals,phaseandcomputingthedensityaredescribed.Moreover,someideasforthefurtherimprovementofthemethodarealsonoticedinthearticle.

  • 标签: HCN波形 HL-2A 等离子体 密度计算 基准电平
  • 简介:密度变化首先用一个最新发达的多信道的冷杉木干涉仪系统在HL-2Atokamak血浆的核心区域被测量。在diver岩山欧姆的分泌物,我们测量了5%的光线的密度变化层次,它在MHD的外观期间增加到10-20%活动。大多数在密度变化光谱的力量密度直接与m=被联系2撕模式。到1/3和血浆监禁的变化层次还原剂被改进在期间离开加热的轴electron-cyclotron-resonance(ECRH)。

  • 标签: FIR干涉仪 托卡马克 受控热核反应装置 测量方法
  • 简介:Byusingthetechniqueofintegrationwithinanorderedproductofoperators,thenormalordereddensityoperatorofthephoton-subtractedsqueezedthermalstate(PSSTS)isderived.ThenthecorrespondingWignerfunctionispresentedbyusingthecoherentstaterepresentationoftheWigneroperator.ThenonclassicalpropertiesofthePSSTSarediscussedbasedonthenegativityoftheWignerfunction.

  • 标签: 经营范围 密度算符 魏格纳 压缩 光子 函数
  • 简介:Waveguidesuperlattices,aspecialtypeofwaveguidearrays,canbedesignedtoachieveverylowcrosstalkatsubmicrometer/subwavelengthpitches.Thetheoreticalframeworkanddesignrationalesforsuchwaveguidesuperlatticeswillbepresentedindepth.Waveguidesidewallroughnesscanhelptodeterthecoherentcouplingbetweenidenticalwaveguidesinnearbysupercells,butitalsoinducesrandomfluctuationoftransmission.Statisticalbehaviorofthetransmissionduetoroughnessinawaveguidesuperlatticeissystematicallytreated.Complextransmissioncharacteristicsduetospectraloscillationandrandomroughnesswillbepresented,andtheirevolutionwiththesuperlatticelengthwillbeanalyzed.

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