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Superfluid drag of two-species Bose-Einstein condensates in optical lattices
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 1535580
Author(s) Hofer, Patrick P.; Bruder, C.; Stojanovic, Vladimir M.
Author(s) at UniBasel Bruder, Christoph
Stojanovic, Vladimir
Potts, Patrick
Year 2012
Title Superfluid drag of two-species Bose-Einstein condensates in optical lattices
Journal Physical Review A
Volume 86
Number 3
Pages / Article-Number 033627
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.
Publisher American Institute of Physics
ISSN/ISBN 1050-2947
edoc-URL http://edoc.unibas.ch/dok/A6070826
Full Text on edoc No
Digital Object Identifier DOI 10.1103/PhysRevA.86.033627
ISI-Number 000309101700016
Document type (ISI) Article
 
   

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