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Superfluid drag of two-species Bose-Einstein condensates in optical lattices

Hofer, Patrick P. and Bruder, C. and Stojanovic, Vladimir M.. (2012) Superfluid drag of two-species Bose-Einstein condensates in optical lattices. Physical review. A, Atomic, molecular, and optical physics, Vol. 86, H. 3 , 033627.

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Official URL: http://edoc.unibas.ch/dok/A6070826

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Abstract

We study two-species Bose-Einstein condensates in quasi-two-dimensional optical lattices of varying geometry and potential depth. Based on the numerically exact Bloch and Wannier functions obtained using the plane-wave expansion method, we quantify the drag (entrainment coupling) between the condensate components. This drag originates from the (short-range) interspecies interaction and increases with the kinetic energy. As a result of the interplay between interaction and kinetic energy effects, the superfluid-drag coefficient shows a nonmonotonic dependence on the lattice depth. To make contact with future experiments, we quantitatively investigate the drag for mass ratios corresponding to relevant atomic species.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Bruder, Christoph and Stojanovic, Vladimir M.
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:1050-2947
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:01 Mar 2013 11:13
Deposited On:01 Mar 2013 11:07

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