Dynamics of collapsing and exploding Bose-Einstein condensates

Details Dynamics of collapsing and exploding Bose-Einstein condensates Dynamics of collapsing and exploding Bose-Einstein condensates

2001-05-02

arxiv.org/abs/cond-mat/0105019v3

Physics

Condensed Matter

Statistical Mechanics

7 pgs., 6 figs.; Clarified text based on Referee comments, added references

Scientific paper

10.1038/35085500

We explored the dynamics of how a Bose-Einstein condensate collapses and subsequently explodes when the balance of forces governing the size and shape of the condensate is suddenly altered. A condensate's equilibrium size and shape is strongly affected by the inter-atomic interactions. Our ability to induce a collapse by switching the interactions from repulsive to attractive by tuning an externally-applied magnetic field yields a wealth of detailed information on the violent collapse process. We observe anisotropic atom bursts that explode from the condensate, atoms leaving the condensate in undetected forms, spikes appearing in the condensate wave function, and oscillating remnant condensates that survive the collapse. These all have curious dependencies on time, the strength of the interaction, and the number of condensate atoms. Although ours would seem to be a simple well-characterized system, our measurements reveal many interesting phenomena that challenge theoretical models.

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