SP Seminar @SISSA Via Bonomea 265, Tuesday 13 February at 11 am - C. MEJIA-MONASTERIO

[CM Section]

Joint ICTP/SISSA Statistical Physics Seminar

Tuesday 13 February at 11:00 a.m.
SISSA Via Bonomea 265, room 128
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Speaker: Carlos Mejia-Monasterio (Technical University of Madrid)

Title: Driven tracer in quiescent baths: anomalous diffusion and 
induced-interaction

In this talk I will discuss the motion of a tracer particle driven by an 
external
  constant force through a quiescent lattice gas. Due to the interaction 
between
the tracer and the bath particles, here modelled as an exclusion 
process, the
driven tracer reaches a steady-state when the external force and the 
friction
exerted by the bath balance each other. The steady-state is 
characterised by
a non equilibrium broad inhomogeneity of the bath density surrounding the
driven tracer yielding a rich variety of behaviours. I show that 
depending on
the effective dimension of the lattice, the driven tracer exhibits from 
sub-diffusive
to strong super-diffusive transport in the limit of high of bath particles.
Moreover, when more than one driven tracers exist, the external and 
friction
forces mediate an anisotropic attractive interacting force between the 
tracers,
leading to the formation of clusters. I will show through numerical 
results that
such scenario extends into continuous-space and continuous-time dynamics.