Stability and collapse of a hybrid Bose-Einstein condensate of atoms and molecules

Details Stability and collapse of a hybrid Bose-Einstein condensate of atoms and molecules Stability and collapse of a hybrid Bose-Einstein condensate of atoms and molecules

2001-05-28

arxiv.org/abs/cond-mat/0105534v2

J. Phys. B 34 (2001) 4231

Physics

Condensed Matter

Soft Condensed Matter

18 revtex pages, 9 postscript figures, revised version

Scientific paper

10.1088/0953-4075/34/21/312

The dynamics of stability and collapse of a trapped atomic Bose-Einstein condensate (BEC) coupled to a molecular one is studied using the time-dependent Gross-Pitaevskii (GP) equation including a nonlinear interaction term which can transform two atoms into a molecule and vice versa. We find interesting oscillation of the number of atoms and molecules for a BEC of fixed mass. This oscillation is a consequence of continuous transformation in the condensate of two atoms into a molecule and vice versa. For the study of collapse an absorptive contact interaction and an imaginary quartic three-body recombination term are included in the GP equation. It is possible to have a collapse of one or both components when one or more of the nonlinear terms in the GP equation are attractive in nature, respectively.

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