Lecturer: Dr. Oren Raz
Affiliation: University of Maryland
Abstract:
Under static conditions, a system satisfying
detailed balance generically relaxes to an
equilibrium state in which there are no
currents. To generate persistent currents,
either detailed balance must be broken or the
system must be driven in a time-dependent
manner. In both cases, the currents are
maintained at the cost of entropy production.
Are these two paradigmatic scenarios
effectively equivalent? In this talk, I will
present a mapping between nonequilibrium
stationary states and stochastic pumps.
Nonequilibrium steady states and periodic-
driving are often used to model, respectively,
biomolecular motors driven by chemical
reactions and artificial molecular machines
steered by the variation of external,
macroscopic parameters. Our results suggest
that anything a biomolecular machine can do,
an artificial molecular machine can do equally
well. This principle is illustrated by showing
that kinetic proofreading, a NESS mechanism
that explains the low error rates in biochemical
reactions, can be effectively mimicked by a
constrained periodic driving.