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Bistability and fluctuations of a weakly interacting Bose-Einstein condensate | | Z. Idziaszek
; L. Zawitkowski
; M. Gajda
; K. Rzazewski
; | | Date: |
1 Aug 2007 | | Abstract: | Fluctuations of the number of condensed atoms in a finite-size, weakly
interacting Bose gas confined in a box potential are investigated for
temperatures up to the critical region. We develop a recursive scheme that
allows to calculate condensate statistics for systems of few hundred particles
and an approximate approach applicable to systems with N~10000 particles. We
point out the importance of particle-number constrain for the statistics near
the critical region, which reveal a novel bistable phase of the condensate. Our
analysis is performed in the canonical ensemble and the excitations are
described in a self-consistent way within the Bogoliubov-Popov approximation. | | Source: | arXiv, 0708.0092 | | Services: | Forum | Review | PDF | Favorites | |
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