Fluctuation-Induced Forces in Nonequilibrium Diffusive Dynamics

被引：47

作者：

Aminov, Avi ^{[1
]}

Kafri, Yariv ^{[1
]}

Kardar, Mehran ^{[2
]}

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[2] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 23期

基金：

美国国家科学基金会;

关键词：

LONG-RANGE CORRELATIONS; STATE;

D O I：

10.1103/PhysRevLett.114.230602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Fluctuations in nonequilibrium steady states generically lead to power law decay of correlations for conserved quantities. Embedded bodies which constrain fluctuations, in turn, experience fluctuation induced forces. We compute these forces for the simple case of parallel slabs in a driven diffusive system. Our model calculations show that the force falls off with slab separation d as k(B)T/d (at temperature T, and in all spatial dimensions) but can be attractive or repulsive. Unlike the equilibrium Casimir force, the force amplitude is nonuniversal and explicitly depends on dynamics. The techniques introduced can be used to study pressure and fluctuation induced forces in a broad class of nonequilibrium systems.

引用

页数：5

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