Speaker
Alessandro Sarracino
(Dipartimento di Ingegneria, Università della Campania "L. Vanvitelli")
Description
We study the diffusion coefficient of an active tracer in a schematic crowded environment, represented as a lattice gas of passive particles with hardcore interactions. Starting from the Master Equation of the problem, we put forward a closure approximation that goes beyond trivial mean field and provides the diffusion coefficient for arbitrary density. The approximation is accurate for a wide range of parameters and correctly captures numerous nonequilibrium effects, which are the signature of the activity in the system. Preliminary results on the phenomenon of absolute negative mobility when the tracer is driven by an external force are also discussed.
Authors
Alessandro Sarracino
(Dipartimento di Ingegneria, Università della Campania "L. Vanvitelli")
Prof.
Olivier Bénichou
(Sorbonne Université)
Dr
Pierre Illien
(Sorbonne Université)
Dr
Pierre Rizkallah
(Sorbonne Université)
