Classical field techniques for condensates in one-dimensional rings at finite temperatures

A. Nunnenkamp, J. N. Milstein, and K. Burnett
Phys. Rev. A 75, 033604 – Published 12 March 2007

Abstract

For a condensate in a one-dimensional ring geometry, we compare the thermodynamic properties of three conceptually different classical field techniques: stochastic dynamics, microcanonical molecular dynamics, and the “classical field method.” Starting from nonequilibrium initial conditions, all three methods approach steady states whose distribution and correlation functions are in excellent agreement with an exact evaluation of the partition function in the high-temperature limit. Our study helps to establish these various classical field techniques as powerful nonperturbative tools for systems at finite temperatures.

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  • Received 29 November 2006

DOI:https://doi.org/10.1103/PhysRevA.75.033604

©2007 American Physical Society

Authors & Affiliations

A. Nunnenkamp, J. N. Milstein, and K. Burnett

  • Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom

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Vol. 75, Iss. 3 — March 2007

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