[en] We study the decay dynamics of an interacting Bose-Einstein condensate in the presence of a metastable trapping potential from which the condensate can escape via tunneling through finite barriers. The time-dependent decay process is reproduced by means of the instantaneous decay rates of the condensate at a given population of the quasi-bound state, which are calculated with the method of complex scaling. Both for the case of a double-barrier potential as well as for the case of a tilted periodic potential, we find pronounced deviations from a monoexponential decay behavior, which would generally be expected in the absence of the atom-atom interaction.
Disciplines :
Electrical & electronics engineering Physics
Author, co-author :
Schlagheck, Peter ; Université de Liège - ULiège > Département de physique > Physique quantique statistique
Wimberger, S.
Language :
English
Title :
Nonexponential decay of Bose-Einstein condensates: a numerical study based on the complex scaling method
Publication date :
2007
Audience :
International
Journal title :
Applied Physics. B, Lasers and Optics
ISSN :
0946-2171
eISSN :
1432-0649
Publisher :
Springer Science & Business Media B.V., New York, United States - New York
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