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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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