Dynamics and escape of active particles in a harmonic trap

by Dan Wexler

Ben Gurion University
at Condensed Matter Theory Seminar

Wed, 11 Dec 2019, 13:30
Sacta-Rashi Building for Physics (54), room 207


The dynamics of active particles are 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 by random active forces in terms of an effective temperature. This kind of description is tempting due to the similarities (or lack thereof) with systems in or near thermal equilibrium. However, the generality and validity of the effective temperature is not yet fully understood. I will present expressions derived for the effective temperature due to the potential and kinetic energies, their ability to predict escape times from a harmonic trap and alternative expressions where effective temperatures are a poor indicator of the escape time. I will also show some evidence for the validity of these effective temperatures for non-harmonic dynamics, as well as their limitations in describing different active force implementations.

Created on 16-11-2019 by Schechter, Moshe (smoshe)
Updaded on 03-12-2019 by Schechter, Moshe (smoshe)