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, 86 (3). 033627.

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

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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. and Potts, Patrick
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Institute of Physics
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:26 May 2021 07:19
Deposited On:01 Mar 2013 11:07

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