Broken space-time symmetries and mechanisms of rectification of ac fields by nonlinear (non)adiabatic response
arXiv:cond-mat/0204274 · doi:10.1103/PhysRevE.66.041104
Abstract
We consider low-dimensional dynamical systems exposed to a heat bath and to additional ac fields. The presence of these ac fields may lead to a breaking of certain spatial or temporal symmetries which in turn cause nonzero averages of relevant observables. Nonlinear (non)adiabatic response is employed to explain the effect. We consider a case of a particle in a periodic potential as an example and discuss the relevant symmetry breakings and the mechanisms of rectification of the current in such a system.
11 pages, 10 figures
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