当前位置： 文档下载 > 所有分类 > 医药卫生 > 中医中药 > Decoherence due to three-body loss and its effect on the state of a Bose-Einstein condensat当前位置： 文档下载 > 所有分类 > 医药卫生 > 中医中药 > Decoherence due to three-body loss and its effect on the state of a Bose-Einstein condensatA Born-Markov master equation is used to investigate the decoherence of the state of a macroscopically occupied mode of a cold atom trap due to three-body loss. In the large number limit only coherent states remain pure for times longer than the decoherenc
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arXiv:cond-mat/0208319v1 [cond-mat.stat-mech] 16 Aug 2002Decoherenceduetothree-bodylossanditse ectonthestateofaBose-EinsteincondensateMichaelW.JackNTTBasicResearchLaboratories,NTTCorporation,3-1,MorinosatoWakamiya,Atsugi-shi,Kanagawa243-0198,JapanAbstractABorn-Markovmasterequationisusedtoinvestigatethedecoherenceofthestateofamacro-scopicallyoccupiedmodeofacoldatomtrapduetothree-bodyloss.Inthelargenumberlimitonlycoherentstatesremainpurefortimeslongerthanthedecoherencetime:thetimeittakesforjustthreeatomstobelostfromthetrap.Forlargenumbersofatoms(N>104)thedecoherencetimeisfoundtobemuchfasterthanthephasecollapsetimecausedbyintra-trapatomiccollisions.
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