Stability of Bose-Einstein Condensates Confined in Traps

Details Stability of Bose-Einstein Condensates Confined in Traps Stability of Bose-Einstein Condensates Confined in Traps

1999-12-29

arxiv.org/abs/cond-mat/9912470v1

Physics

Condensed Matter

Soft Condensed Matter

74 pages with 12 figures, submitted to the review section of International Journal of Modern Physics B

Scientific paper

10.1142/S0217979200000595

Bose-Einstein condensation has been realized in dilute atomic vapors. This achievement has generated immerse interest in this field. Presented is a review of recent theoretical research into the properties of trapped dilute-gas Bose-Einstein condensates. Among them, stability of Bose-Einstein condensates confined in traps is mainly discussed. Static properties of the ground state are investigated by use of the variational method. The anlysis is extended to the stability of two-component condensates. Time-development of the condensate is well-described by the Gross-Pitaevskii equation which is known in nonlinear physics as the nonlinear Schr\"odinger equation. For the case that the inter-atomic potential is effectively attractive, a singularity of the solution emerges in a finite time. This phenomenon which we call collapse explains the upper bound for the number of atoms in such condensates under traps.

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