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

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

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

Authors

Nunnenkamp, A.

Milstein, J. N.

Burnett, K.

Description

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 non-equilibrium 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 non-perturbative tools for systems at finite temperatures.
7 pages, 7 figures; minor changes, one reference added