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Brownian motors
Author(s) -
Hänggi P.,
Marchesoni F.,
Nori F.
Publication year - 2005
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.200410121
Subject(s) - brownian motion , brownian motor , statistical physics , noise (video) , brownian dynamics , physics , molecular motor , quantum , constructive , diffusion process , classical mechanics , computer science , process (computing) , quantum mechanics , nanotechnology , work (physics) , knowledge management , innovation diffusion , ratchet , artificial intelligence , image (mathematics) , operating system , materials science
In systems possessing a spatial or dynamical symmetry breaking, thermal Brownian motion combined with unbiased, non‐equilibrium noise gives rise to a channelling of chance that can be used to exercise control over systems at the micro‐ and even on the nano‐scale. This theme is known as the “Brownian motor” concept. The constructive role of (the generally overdamped) Brownian motion is exemplified for a noise‐induced transport of particles within various set‐ups. We first present the working principles and characteristics with a proof‐of‐principle device, a diffusive temperature Brownian motor. Next, we consider very recent applications based on the phenomenon of signal mixing. The latter is particularly simple to implement experimentally in order to optimize and selectively control a rich variety of directed transport behaviors. The subtleties and also the potential for Brownian motors operating in the quantum regime are outlined and some state‐of‐the‐art applications, together with future roadways, are presented.