Fate of a Bose-Einstein condensate with attractive interaction

Details Fate of a Bose-Einstein condensate with attractive interaction Fate of a Bose-Einstein condensate with attractive interaction

1998-07-27

arxiv.org/abs/cond-mat/9807359v1

Physics

Condensed Matter

3 pages, REVTeX; email to huang@mitlns.mit.edu (Kerson Huang)

Scientific paper

10.1103/PhysRevA.60.3317

We calculate the decay amplitude of a harmonically trapped Bose-Einstein condensate with attractive interaction via the Feynman path integral. We find that when the number of particles is less than a critical number, the condensate decays relatively slowly through quantum tunneling. When the number exceeds the critical one, a "black hole" opens up at the center of the trap, in which density fluctuations become large due to a negative pressure, and collisional loss will drain the particles from the trap. As the black hole is fed by tunneling particles, we have a novel system in which quantum tunneling serves as a hydrodynamic source.

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