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娻腃婪.PDF

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娻腃婪

JAERI-Conf 96-009 2.Antisymmetrizedmoleculardynamicsofwavepackets withstochasticincorporationofVlasovequation a b AkiraOnoandHisashiHoriuchi α Institute01PhysicalandChemicalResearch(RIKEN),Wako,Saitama351-01,Japan bDepartment01Physics,KyotoUniversity,Kyoto606圃 01,Japan I.INTRODUCTION InOl1rrecentstudyofstatisticalpropertyoftheantisymmetrizedmoleculardynamics(AMD) [1,2],wefound出attheensembleofAMDwavefl1nctionsofahotnuclel1shasgoodstatistical propertyofql1antl1mmechanicsintheobservablessuchasthesingle-particIemomentumdistribl1- tionandtheoccl1pationprobabilityofsingle-particlelevels[2].However,AMDhasprobleminthe descriptionofthef l1tl1retimeevoll1tionoftheminorcomponentofthewavepacketasanindepen- dentbranch,whichistheoriginofthefailureinthenl1cIeonemissionandthephaseeql1ilibril1mof liquidandgas[1].EachnucIeoninthenl1cIel1shasamomentumwidthofthewavepacketwhich isanimportantpa此 ofitsFermimotioninthenucIeus.WhenthenucIeonemissionprocessis describedbytheexacttheory,theminorbranchofthenl1cIeonemissionshouldbecausedbythe high-momentl1mtail,whichcannothappeninAMDandthewholenl1cIeonwavepacketremains inthenl1cIel1sbecausethewavepacketisnotallowedtosplitoff.Thereforetheironicalconclu- sionofthestudyofstatisticalpropertyofAMDwasthattheproblemisnotduetoanythingvery complexanduncontrollablebytheusualmicroscopicconsiderationsbl1t dl1etotherathersimple single-parti cIemotionwhichhasrestrictioninmolec111ardynamicswithwavepackets.Thismeans int l1mthatwehavechancetoovercomethisproblembyrespectingthespreadingandthesplitting ofwavepacketswhicharenaturallypredictedbysimpleone-bodyconsiderations. Thefirstpl1中oseofthisreportistopresentanextendedAMDmodelwhichcangenerallyde- scribes l1chminorbranchingprocessesbyremovingtherestrictionontheone-bodydistributi

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