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Título:
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Weakly driven quantum coherent ratchets in cold-atom systems
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Autores:
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Heimsoth, M. ;
Creffield, Charles E. ;
Sols Lucía, Fernando
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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, 2010-08-12
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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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Materia = Ciencias: Física: Física del estado sólido
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Tipo = Artículo
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Resumen:
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We present an analytical study of the response of cold atoms in an optical lattice to a weak time- and space-asymmetric periodic driving signal. In the noninteracting limit, and for a finite set of resonant frequencies, we show how a coherent, long-lasting ratchet current results from the interference between first- and second-order processes. In those cases, a suitable three- level model can account for the entire dynamics, yielding surprisingly good agreement with numerically exact results for weak and moderately strong driving.
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En línea:
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https://eprints.ucm.es/32950/1/Creffield%20C%2006%20LIBRE.pdf
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