The Yrast Spectra of Weakly Interacting Bose-Einstein Condensates

Details The Yrast Spectra of Weakly Interacting Bose-Einstein Condensates The Yrast Spectra of Weakly Interacting Bose-Einstein Condensates

1999-05-05

arxiv.org/abs/cond-mat/9905053v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.83.2695

The low energy quantal spectrum is considered as a function of the total angular momentum for a system of weakly interacting bosonic atoms held together by an external isotropic harmonic potential. It is found that besides the usual condensation into the lowest state of the oscillator, the system exhibits two additional kinds of condensate and associated thermodynamic phase transitions. These new phenomena are derived from the degrees of freedom of "partition space" which describes the multitude of different ways in which the angular momentum can be distributed among the atoms while remaining all the time in the lowest state of the oscillator.

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