# Effective temperature of active matter.

@article{Loi2008EffectiveTO, title={Effective temperature of active matter.}, author={Davide Loi and Stefano Mossa and Leticia F. Cugliandolo}, journal={Physical review. E, Statistical, nonlinear, and soft matter physics}, year={2008}, volume={77 5 Pt 1}, pages={ 051111 } }

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.

## 112 Citations

Effective temperature of active complex matter

- Physics
- 2010

It is found that an effective temperature allows one to rationalize the out-of-equilibrium dynamics of the system and is shown how to use this concept to interpret experimental results and suggest possible innovative research directions.

Non-conservative forces and effective temperatures in active polymers

- Physics
- 2011

The fluctuation–dissipation relation allows for the definition of an effective temperature that is compatible with the results obtained by using a tracer particle as a thermometer and an intriguing linear dependence on the tracer diffusion constant times the density of the embedding matrix.

Communication: Effective temperature and glassy dynamics of active matter.

- PhysicsThe Journal of chemical physics
- 2011

A systematic expansion of the many-body master equation for active matter, in which motors power configurational changes as in the cytoskeleton, is shown to yield a description of the steady state…

Effective Temperature in Active Brownian Particles

- MathematicsFluctuation and Noise Letters
- 2019

In this paper, we perform a numerical analysis of the effective temperature extracted from the deviations from the fluctuation dissipation theorem in a system of active Brownian spherical particles…

Dynamics and escape of active particles in a harmonic trap

- PhysicsPhysical Review Research
- 2020

The dynamics of active particles is of interest at many levels and is the focus of theoretical and experimental research. There have been many attempts to describe the dynamics of particles affected…

Phase transition and emergence of active temperature in an active Brownian system in underdamped background.

- PhysicsPhysical review. E
- 2020

With an increase in background dissipation, the difference between active temperature and the background solvent temperature decreases and the difference is found to eventually vanish in the overdamped limit, demonstrating the correctness of the calculation.

Effects of active fluctuations on energetics of a colloidal particle: Superdiffusion, dissipation and entropy production

- PhysicsPhysica A: Statistical Mechanics and its Applications
- 2019

Driven active matter: Fluctuations and a hydrodynamic instability

- PhysicsPhysical Review Fluids
- 2019

Wet active matter in the presence of an imposed temperature gradient, or chemical potential gradient, is considered. It is shown that there is a new type of convective instability that is caused by a…

Effective temperature of active fluids and sheared soft glassy materials

- PhysicsThe European physical journal. E, Soft matter
- 2018

It is demonstrated that effective temperatures extracted from the many-body simulations fit analytical expressions that are obtained for a single active particle inside a visco-elastic fluid, and suggests a unified description for the dynamics inside active systems.

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