An ensemble of particles in thermal equilibrium at temperature $T$, modeled by Nos`e-Hoover dynamics, moves on a triangular lattice of oriented semi-disk elastic scatterers. Despite the scatterer asymmetry a directed transport is clearly ruled out by the second law of thermodynamics. Introduction of a polarized zero mean monochromatic field creates a directed stationary flow with nontrivial dependence on temperature and field parameters. We give a theoretical estimate of directed current induced by a microwave field in an antidot superlattice in semiconductor heterostructures.
G. Cristadoro, DL. Shepelyansky (2005). Nonequilibrium stationary states with ratchet effect. PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS, 71, 36111-1-036111-4 [10.1103/PhysRevE.71.036111].
Nonequilibrium stationary states with ratchet effect
CRISTADORO, GIAMPAOLO;
2005
Abstract
An ensemble of particles in thermal equilibrium at temperature $T$, modeled by Nos`e-Hoover dynamics, moves on a triangular lattice of oriented semi-disk elastic scatterers. Despite the scatterer asymmetry a directed transport is clearly ruled out by the second law of thermodynamics. Introduction of a polarized zero mean monochromatic field creates a directed stationary flow with nontrivial dependence on temperature and field parameters. We give a theoretical estimate of directed current induced by a microwave field in an antidot superlattice in semiconductor heterostructures.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
