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Author Kagan, Y. ♦ Shlyapnikov, G. V. ♦ Walraven, J. T.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ BOSE-EINSTEIN CONDENSATION ♦ ATOMS ♦ GASES ♦ TRAPS ♦ SCATTERING LENGTHS ♦ WAVE FUNCTIONS ♦ LIFETIME ♦ EXCITED STATES ♦ DISTRIBUTION
Abstract We discuss Bose-Einstein condensation in a trapped atomic gas and analyze how the sign of the scattering length {ital a} and the ratio {eta} of the interaction between particles to the level spacing in the trap influence the behavior of the condensate wave function {psi}{sub 0}. We find that for {ital a}{lt}0 and {eta}{lt}1 it is possible to form a metastable Bose condensate, with a long characteristic lifetime with respect to contraction and transitions of particles to excited trap states. For {eta}{gt}1 a negative scattering length prevents the formation of the condensate. If {ital a}{approx_gt}0, then an increase of density is accompanied by the evolution of {psi}{sub 0} to a comparatively wide quasihomogeneous distribution. {copyright} {ital 1996 The American Physical Society.}
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-04-01
Publisher Place United States
Journal Physical Review Letters
Volume Number 76
Issue Number 15


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