Work distribution and path integrals in general mean-field systems

被引:36
作者
Imparato, A
Peliti, L
机构
[1] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy
[2] Univ Naples Federico II, Unita INFM, I-80126 Naples, Italy
来源
EUROPHYSICS LETTERS | 2005年 / 70卷 / 06期
关键词
D O I
10.1209/epl/i2005-10067-5
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We consider a mean-field system described by a general collective variable M, driven out of equilibrium by the manipulation of a parameter mu. Given a general dynamics compatible with its equilibrium distribution, we derive the evolution equation for the joint probability distribution function of M and the work W done on the system. We solve this equation by path integrals. We show that the Jarzynski equality holds identically for these dynamics, both at the path integral level and for the classical paths which dominate the expression in the thermodynamic limit. We discuss some implications of our results.
引用
收藏
页码:740 / 746
页数:7
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