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Título:
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Stability and decay of Bloch oscillations in the presence of time-dependent nonlinearity
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Autores:
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Gaul, Christopher ;
Díaz García, Elena ;
Lima, Rodrigo P. A ;
Domínguez-Adame Acosta, Francisco ;
Mueller, C. A.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2011-11-23
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Tipo = Artículo
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Resumen:
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We consider Bloch oscillations of Bose-Einstein condensates in the presence of a time-modulated s-wave scattering length. Generically, the interaction leads to dephasing and decay of the wave packet. Based on a cyclic-time argument, we find-in addition to the linear Bloch oscillation and a rigid soliton solution-an infinite family of modulations that lead to a periodic time evolution of the wave packet. In order to quantitatively describe the dynamics of Bloch oscillations in the presence of time-modulated interactions, we employ two complementary methods: collective coordinates and the linear stability analysis of an extended wave packet. We provide instructive examples and address the question of robustness against external perturbations.
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En línea:
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https://eprints.ucm.es/id/eprint/27191/1/Dguez-Adame14libre.pdf
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