Physics – Quantum Physics
Scientific paper
2006-06-30
Phys. Rev. Lett. 97 (22/12/2006) 250403
Physics
Quantum Physics
submitted to Phys. Rev. Letters
Scientific paper
10.1103/PhysRevLett.97.250403
We study the formation of a quasi-condensate in a nearly one dimensional, weakly interacting trapped atomic Bose gas. We show that a Hartree Fock (mean-field) approach fails to explain the presence of the quasi-condensate in the center of the cloud: the quasi-condensate appears through an interaction-driven cross-over and not a saturation of the excited states. Numerical calculations based on Bogoliubov theory give an estimate of the cross-over density in agreement with experimental results.
Bouchoule Isabelle
Estève Jèrôme
Trebbia Jean-Baptiste
Westbrook Christoph I.
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