<正>ThespatialchaosofBose-Einsteincondensatesinacigar-shapedtrapisstudied.Forasystemwithasteadycurrent,weconstructthegeneralsolutionofthe1st-orderequation.Fromtheboundednessconditionofthegeneralsolution,weobtaintheMelnikovfunctionpredictingtheonsetofchaos.Theunpredictabilityofthesystem’sdis-tributionofatomdensityisalsotheoreticallyanalyzed.Fora23Nasystemmeetingtheperturbationoondition,numericalsimulationsshowtheexistenceofchaos,whichisinaccordancewithouranalyticalresults.Numericalsimulationsofa87Rbsystemdissatisfyingtheperturbationconditionalsodemonstratethatthereexistschaosinthesystem.Thecasewithoutacurrentisalsoinvestigated.
