Phys. Rev. Lett. 87, 210404 (2001) [4 pages]Classical-Field Method for Time Dependent Bose-Einstein Condensed GasesReceived 8 January 2001; published 2 November 2001 We propose a method to study the time evolution of Bose-Einstein condensed gases perturbed from an initial thermal equilibrium, based on the Wigner representation of the N-body density operator. We show how to generate a collection of random classical fields sampling the initial Wigner distribution in the number conserving Bogoliubov approximation. The fields are then evolved with the time dependent Gross-Pitaevskii equation. We illustrate the method with the damping of a collective excitation of a one-dimensional Bose gas. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.210404
DOI:
10.1103/PhysRevLett.87.210404
PACS:
03.75.Fi, 05.10.Gg, 42.50.-p
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