Nonlinear Dynamics of a Bose Condensed Gas

Details Nonlinear Dynamics of a Bose Condensed Gas Nonlinear Dynamics of a Bose Condensed Gas

1996-12-19

arxiv.org/abs/cond-mat/9612175v1

Phys. Lett. A 227 (1997) 259

Physics

Condensed Matter

5 pages, REVTeX, 4 postscript figures, available also at http://anubis.science.unitn.it/~dalfovo/papers/papers.html

Scientific paper

10.1016/S0375-9601(97)00069-8

We investigate the dynamic behavior of a Bose-condensed gas of alkali atoms interacting with repulsive forces and confined in a magnetic trap at zero temperature. Using the Thomas-Fermi approximation, we rewrite the Gross-Pitaevskii equation in the form of the hydrodynamic equations of superfluids. We present solutions describing large amplitude oscillations of the atomic cloud as well as the expansion of the gas after switching off the trap. We compare our theoretical predictions with the recent experimental data obtained at Jila and MIT.

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