Jump to main content
Jump to site search

Issue 8, 2011
Previous Article Next Article

Effective temperature of active complex matter

Author affiliations


We use molecular dynamics simulations to study the dynamics of an ensemble of interacting self-propelled semi-flexible polymers in contact with a thermal bath. Our intention is to model complex systems of biological interest. We find that an effective temperature allows one to rationalize the out-of-equilibrium dynamics of the system. This parameter is measured in several independent ways—from fluctuation–dissipation relations and by using tracer particles—and they all yield equivalent results. 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. We show how to use this concept to interpret experimental results and suggest possible innovative research directions.

Graphical abstract: Effective temperature of active complex matter

Back to tab navigation

Publication details

The article was received on 13 Dec 2010, accepted on 01 Mar 2011 and first published on 10 Mar 2011

Article type: Communication
DOI: 10.1039/C0SM01484B
Citation: Soft Matter, 2011,7, 3726-3729
  •   Request permissions

    Effective temperature of active complex matter

    D. Loi, S. Mossa and L. F. Cugliandolo, Soft Matter, 2011, 7, 3726
    DOI: 10.1039/C0SM01484B

Search articles by author