Effective temperature of active matter
Abstract
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.
- Publication:
-
Physical Review E
- Pub Date:
- May 2008
- DOI:
- 10.1103/PhysRevE.77.051111
- arXiv:
- arXiv:0711.4946
- Bibcode:
- 2008PhRvE..77e1111L
- Keywords:
-
- 05.70.Ln;
- Nonequilibrium and irreversible thermodynamics;
- Condensed Matter - Soft Condensed Matter;
- Condensed Matter - Statistical Mechanics;
- Quantitative Biology - Cell Behavior
- E-Print:
- Phys. Rev. E 77, 051111 (2008)