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Mimicking Nonequilibrium Steady States with Time-Periodic Driving

Mimicking Nonequilibrium Steady States with Time-Periodic Driving

Datum: 15. November 2016 13:15

Ort: NWZ II, Raum 4.331, Pfaffenwaldring 57, Stuttgart-Vaihingen

Mimicking Nonequilibrium Steady States with Time-Periodic Driving
Oren Raz, University of Maryland

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 non-equilibrium steady state mechanism that explains the low error rates in biochemical reactions, can be effectively mimicked by a constrained periodic driving.

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