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Article Dans Une Revue Physical Review Letters Année : 2008

Effective temperature of active matter

Résumé

We follow the dynamics of an ensemble of interacting self-propelled 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 higher value than the temperature of the bath when the effect of the motors is not correlated with the structural rearrangements they induce. Instead, it takes a slightly lower value than the environmental temperature when susceptible motors are used.

Dates et versions

hal-00519904 , version 1 (21-09-2010)

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Davide Loi, Stefano Mossa, Leticia F. Cugliandolo. Effective temperature of active matter. Physical Review Letters, 2008, 77, pp.051111. ⟨hal-00519904⟩
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