Effective temperature of active matter

被引：161

作者：

Loi, Davide ^{[1
]}

Mossa, Stefano ^{[1
]}

Cugliandolo, Leticia E. ^{[2
]}

机构：

[1] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[2] Univ Paris 06, LPTHE, UMR 7589, F-75252 Paris 05, France

来源：

PHYSICAL REVIEW E | 2008年 / 77卷 / 05期

关键词：

D O I：

10.1103/PhysRevE.77.051111

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We follow the dynamics of an ensemble of interacting self-propelled motorized particles in contact with an equilibrated thermal bath. We find that the fluctuation-dissipation relation allows for the definition of an effective temperature that is compatible with the results obtained using a tracer particle as a thermometer. The effective temperature takes a value which is higher than the temperature of the bath, and it is continuously controlled by the motor intensity.

引用

页数：4

共 28 条

[1]

Alberts B., 1994, MOL BIOL CELL

[2] COOPERATIVE FORMATION OF CHIRAL PATTERNS DURING GROWTH OF BACTERIAL COLONIES [J].

BENJACOB, E ;

COHEN, I ;

SHOCHET, O ;

TENENBAUM, A ;

VICSEK, T ;

CZIROK, A .

PHYSICAL REVIEW LETTERS, 1995, 75 (15) :2899-2902

[3] BACTERIAL BEHAVIOR [J].

BERG, HC .

NATURE, 1975, 254 (5499) :389-392

[4] Shearing a glassy material: Numerical tests of nonequilibrium mode-coupling approaches and experimental proposals [J].

Berthier, L ;

Barrat, JL .

PHYSICAL REVIEW LETTERS, 2002, 89 (09) :957021-957024

[5] Nonequilibrium dynamics and fluctuation-dissipation relation in a sheared fluid [J].

Berthier, L ;

Barrat, JL .

JOURNAL OF CHEMICAL PHYSICS, 2002, 116 (14) :6228-6242

[6]

BINDER K., 2005, GLASSY MAT DISORDERE

[7] Thermal properties of slow dynamics [J].

Cugliandolo, L ;

Kurchan, J .

PHYSICA A, 1999, 263 (1-4) :242-251

[8]

Cugliandolo L. F., 2003, SLOW RELAXATION GLAS, V77

[9] Energy flow, partial equilibration, and effective temperatures in systems with slow dynamics [J].

Cugliandolo, LF ;

Kurchan, J ;

Peliti, L .

PHYSICAL REVIEW E, 1997, 55 (04) :3898-3914

[10] Fluctuation-dissipation theorems and entropy production in relaxational systems [J].

Cugliandolo, LF ;

Dean, DS ;

Kurchan, J .

PHYSICAL REVIEW LETTERS, 1997, 79 (12) :2168-2171

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