Phys. Rev. Lett. 88, 210404 (2002) [4 pages]Real-Time Bose-Einstein Condensation in a Finite Volume with a Discrete SpectrumReceived 11 February 2002; published 13 May 2002 We show that Bose condensation in real time occurs in a finite system not only as an accumulation of the bosons in the ground state below a critical temperature, but also as a rapid enhancement of an arbitrary small symmetry breaking, followed by a very slow decay of the symmetry breaking order parameter from the almost ideal value to the vanishing equilibrium value. We show this analytically on an exactly soluble model and numerically on a model of noninteracting bosons in an oscillator potential. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.210404
DOI:
10.1103/PhysRevLett.88.210404
PACS:
03.75.Fi, 05.20.Dd
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