Abstract:
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. © 2013 American Physical Society.
Registro:
Documento: |
Artículo
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Título: | Multimode model for an atomic Bose-Einstein condensate in a ring-shaped optical lattice |
Autor: | Jezek, D.M.; Cataldo, H.M. |
Filiación: | IFIBA-CONICET Pabellón 1, Ciudad Universitaria, 1428 Buenos Aires, Argentina
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Palabras clave: | Atomic Bose-Einstein condensate; Effective interactions; Ground-state density; Interaction energy parameters; Multimode models; On-site energy; Ring-shaped optical lattices; Stationary state; Bose-Einstein condensation; Crystal lattices; Optical lattices; Optical materials; Computer simulation |
Año: | 2013
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Volumen: | 88
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Número: | 1
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DOI: |
http://dx.doi.org/10.1103/PhysRevA.88.013636 |
Título revista: | Physical Review A - Atomic, Molecular, and Optical Physics
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Título revista abreviado: | Phys Rev A
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ISSN: | 10502947
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CODEN: | PLRAA
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v88_n1_p_Jezek |
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Citas:
---------- APA ----------
Jezek, D.M. & Cataldo, H.M.
(2013)
. Multimode model for an atomic Bose-Einstein condensate in a ring-shaped optical lattice. Physical Review A - Atomic, Molecular, and Optical Physics, 88(1).
http://dx.doi.org/10.1103/PhysRevA.88.013636---------- CHICAGO ----------
Jezek, D.M., Cataldo, H.M.
"Multimode model for an atomic Bose-Einstein condensate in a ring-shaped optical lattice"
. Physical Review A - Atomic, Molecular, and Optical Physics 88, no. 1
(2013).
http://dx.doi.org/10.1103/PhysRevA.88.013636---------- MLA ----------
Jezek, D.M., Cataldo, H.M.
"Multimode model for an atomic Bose-Einstein condensate in a ring-shaped optical lattice"
. Physical Review A - Atomic, Molecular, and Optical Physics, vol. 88, no. 1, 2013.
http://dx.doi.org/10.1103/PhysRevA.88.013636---------- VANCOUVER ----------
Jezek, D.M., Cataldo, H.M. Multimode model for an atomic Bose-Einstein condensate in a ring-shaped optical lattice. Phys Rev A. 2013;88(1).
http://dx.doi.org/10.1103/PhysRevA.88.013636