Hydrodynamic flow of expanding Bose-Einstein condensates

Details Hydrodynamic flow of expanding Bose-Einstein condensates Hydrodynamic flow of expanding Bose-Einstein condensates

2003-07-09

arxiv.org/abs/cond-mat/0307191v1

Phys. Rev. A 68, 035603 (2003)

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 3 figures, RevTeX4. To appear in Physical Review A

Scientific paper

10.1103/PhysRevA.68.035603

We study expansion of quasi-one-dimensional Bose-Einstein condensate (BEC) after switching off the confining harmonic potential. Exact solution of dynamical equations is obtained in framework of the hydrodynamic approximation and it is compared with the direct numerical simulation of the full problem showing excellent agreement at realistic values of physical parameters. We analyze the maximum of the current density and estimate the velocity of expansion. The results of the 1D analysis provides also qualitative understanding of some properties of BEC expansion observed in experiments.

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