Article (Scientific journals)
Complex-scaling approach to the decay of Bose-Einstein condensates
Schlagheck, Peter; Paul, T.
2006In Physical Review. A, Atomic, molecular, and optical physics, 73 (2)
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Abstract :
[en] The mean-field dynamics of a Bose-Einstein condensate is studied in the presence of a microscopic trapping potential from which the condensate can escape via tunneling through finite barriers. We show that the method of complex scaling can be used to obtain a quantitative description of this decay process. A real-time propagation approach that is applied to the complex-scaled Gross-Pitaevskii equation allows us to calculate the chemical potentials and lifetimes of the metastably trapped Bose-Einstein condensate. The method is applied to a one-dimensional harmonic confinement potential combined with a Gaussian envelope, for which we compute the lowest symmetric and antisymmetric quasibound states of the condensate. A comparison with alternative approaches using absorbing boundary conditions as well as complex absorbing potentials shows good agreement.
Disciplines :
Physics
Author, co-author :
Schlagheck, Peter ;  Université de Liège - ULiège > Département de physique > Physique quantique statistique
Paul, T.
Language :
English
Title :
Complex-scaling approach to the decay of Bose-Einstein condensates
Publication date :
2006
Journal title :
Physical Review. A, Atomic, molecular, and optical physics
ISSN :
1050-2947
eISSN :
1094-1622
Publisher :
American Physical Society, College Park, United States - Maryland
Volume :
73
Issue :
2
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 November 2010

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