Short-time fluctuations of displacements and work
统计力学
2007-07-31 v1
摘要
A recent theorem giving the initial behavior of very short-time fluctuations of particle displacements in classical many-body systems is discussed. It has applications to equilibrium and non-equilibrium systems, one of which is a series expansion of the distribution of work fluctuations around a Gaussian function. To determine the time-scale at which this series expansion is valid, we present preliminary numerical results for a Lennard-Jones fluid. These results suggest that the series expansion converges up to time scales on the order of a picosecond, below which a simple Gaussian function for the distribution of the displacements can be used.
引用
@article{arxiv.cond-mat/0611592,
title = {Short-time fluctuations of displacements and work},
author = {Ramses van Zon and S. S. Ashwin and E. G. D. Cohen},
journal= {arXiv preprint arXiv:cond-mat/0611592},
year = {2007}
}
备注
10 pages, 3 figures