Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-05-28
Phys. Rev. A 81, 013631 (2010)
Physics
Condensed Matter
Quantum Gases
12 pages, 7 figures
Scientific paper
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 which 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 explictly 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.
Ernst Thomas
Paul Tobias
Schlagheck Peter
No associations
LandOfFree
Transport of ultracold Bose gases beyond the Gross-Pitaevskii description does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Transport of ultracold Bose gases beyond the Gross-Pitaevskii description, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transport of ultracold Bose gases beyond the Gross-Pitaevskii description will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-526628