Forcing inertial Brownian motors: efficiency and negative differential mobility

  • The noise-assisted, directed transport in a one-dimensional dissipative, inertial Brownian motor of the rocking type that is exposed to an external bias is investigated. We demonstrate that the velocity-load characteristics is distinctly non-monotonic, possessing regimes with a negative differential mobility. In addition, we evaluate several possible efficiency quantifiers which are compared among each other. These quantifiers characterize the mutual interplay between the viscous drag and the external load differently, weighing the inherent rectification features from different physical perspectives.

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Author:Marcin KosturGND, Lukasz MachuraORCiDGND, Peter HänggiORCiDGND, Jerzy Łuczka, Peter TalknerGND
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Publishing Institution:Universität Augsburg
Release Date:2006/08/31
Tag:inertial Brownian motor; efficiency; negative differential mobility
GND-Keyword:Brownsche Bewegung; Beweglichkeit <Physik>
Source:erscheint in: Physica A (2006), in press; url:
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Theoretische Physik I
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik