强激光场中原子电离过程光子动量分配分析

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1、万方数据AbstractInthecomplexionsofphysicalresearcharea，interactionoflightandmatterisaneternalsubject．EversincetheexplanationofphotoelectriceffectbyEin·steinadoptingalightquantaview,thissubjecthasdevelopedintoanewstage．EspeciallywiththeinventionofLasersin1960s，whentheintensityoflaserfi

2、eldcontinuouslygrows，leadingtothecomparabilityofelectron—lightinteractionwiththeinnerelectron—coreCoulombinteraction，theoverinvolvedquantumperturbationtheoryinearlyresearchisnotavailableanymore．Undertheinflu-enceofintenselaserlight，suchnonlinear,non·perturbativeprocessesasabovethr

3、esholdionization，high—orderharmonicgenerationandnon—sequentialdou—ble(multiple)ionizationwillbefoundinatoms(molecules)．Newphenomenarequiresofnewtheoreticalmethods，andinvestigationofnewphysicalprocesswillalwaysleadstoanewunderstandingofphysicalrealityandmayhelptheprogressofnewtechn

4、ology．Chapteroneistheintroductorypartofthisthesis．Inthischapter,ashorthistoryofintense—fieldphysicsandreviewoflasersaregiven．Meanwhile，sometypicalprocessesareintroduced．Andtwoexamplesaregiven，showinghowintense—filedphysicscanhelpdiagnosingthesub-atomicelectrondynamics．Chaptertwoan

5、dthreeconcerntheoften—invokedresearchmethodofintense—fieldphysicsatpresent．Themethodsoftime—dependentSchr6dingerequation，strong—fieldapproximation，time—dependentNewton’SequationandKeldyshtheoryareshortlyreviewedinchaptertwo．Amongthese，time—dependentSchrrdingerequationisthemostreli

6、ableandfundamentaltheoreticalmethod．However,duetoitsincapabilityofdisentanglingphysicalprocessandlargenumericalcalculationamount，somekindsofapproximationarealwaysinplace．Keldyshtheoryisimportantinitsmathematicalcontents，andcontributesmuchtOtheearlydevelopmentofintense—fieldarea．In

7、chapterthree，thedetailsofsemi-classicalrescatteringmodelaregiven．Basedonthewidely—acceptedthree—stepscheme，wefirstconstructanensembleofparticlesusingIII万方数据AbstractquantumtunnelingtheorywhosesubsequentdynamicsisgovernedbyNewton’Sequationofmotion．Thismethodhasitsadvantages，suchasba

8、ckanalysisoftrajectories，andhasit