Artículo
Multimode model for an atomic Bose-Einstein condensate in a ring-shaped optical lattice
Fecha de publicación:
07/2013
Editorial:
American Physical Society
Revista:
Physical Review A: Atomic, Molecular and Optical Physics
ISSN:
1050-2947
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We study the population dynamics of a ring-shaped optical lattice with a high number of particles per site and a low (less than ten) number of wells. Using a localized on-site basis defined in terms of stationary states, we were able to construct a multiple-mode model depending on relevant hopping and on-site energy parameters. We show that in the case of two wells, our model corresponds exactly to a recent improvement of the two-mode model. We derive a formula for the self-trapping period, which turns out to be chiefly ruled by the on-site interaction energy parameter. By comparing to time-dependent Gross-Pitaevskii simulations, we show that the multimode model results can be enhanced in a remarkable way over all the regimes by only renormalizing such a parameter. Finally, using a different approach which involves only the ground-state density, we derive an effective interaction energy parameter that turns out to be in accordance with the renormalized one.
Palabras clave:
Multimode Model
,
Bose- Einstein Condensate
,
Optical Lattice
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Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
Jezek, Dora Marta; Cataldo, Horacio Maximo; Multimode model for an atomic Bose-Einstein condensate in a ring-shaped optical lattice; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 88; 1; 7-2013; 1-12
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