Reference : Transport of ultracold Bose gases beyond the Gross-Pitaevskii description
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/75070
Transport of ultracold Bose gases beyond the Gross-Pitaevskii description
English
Ernst, Thomas [> > > >]
Paul, Tobias [> > > >]
Schlagheck, Peter mailto [Université de Liège - ULg > Département de physique > Physique quantique statistique >]
2010
Physical Review. A : General Physics
American Physical Society
81
1
013631
Yes
International
0556-2791
[en] We explore atom-laser-like transport processes of ultracold Bose-condensed atomic vapors in mesoscopic waveguide structures beyond the Gross-Pitaevskii mean-field theory. Based on a microscopic description of the transport process in the presence of a coherent source that models the outcoupling from a reservoir of perfectly Bose-Einstein condensed atoms, we derive a system of coupled quantum evolution equations that describe the dynamics of a dilute condensed Bose gas in the framework of the Hartree-Fock-Bogoliubov approximation. We apply this method to study the transport of dilute Bose gases through an atomic quantum dot and through waveguides with disorder. Our numerical simulations reveal that the onset of an explicitly time-dependent flow corresponds to the appearance of strong depletion of the condensate on the microscopic level and leads to a loss of global phase coherence.
http://hdl.handle.net/2268/75070
10.1103/PhysRevA.81.013631

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
pra10.pdfPublisher postprint725.83 kBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.