Effective temperature of active matter

2007/11/30 by Davide Loi, Stefano Mossa, Leticia F. Cugliandolo · 209 citations
Biochemistry, Genetics and Molecular Biology · Materials Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Condensed matter physics #Dissipation #Effective temperature #Intensity (physics) #Material Dynamics and Properties #Materials science #Mechanics #Micro and Nano Robotics #Optics #Particle (ecology) #Physics #Quantum mechanics #Thermal #Thermodynamics #Thermometer #cond-mat.soft #cond-mat.stat-mech #q-bio.CB

paper · pdf · open access · doi:10.1103/physreve.77.051111

published in Physical Review E 77(5), 051111 (American Physical Society)

openalex publication_date 2008/05/12 · arxiv created 2011/05/04 · arxiv updated 2015/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Fluctuation-Dissipation Theorems and Entropy Production in Relaxational Systems
• A fluctuation theorem for non-equilibrium relaxational systems driven by external forces

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