Coulomb Friction Driving Brownian Motors
نویسندگان
چکیده
منابع مشابه
Consistent description of quantum Brownian motors operating at strong friction.
A quantum Smoluchowski equation is put forward that consistently describes thermal quantum states. In particular, it notably does not induce a violation of the second law of thermodynamics. This so modified kinetic equation is applied to study analytically directed quantum transport at strong friction in arbitrarily shaped ratchet potentials that are driven by nonthermal two-state noise. Depend...
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Peter Hänggi1,∗, Fabio Marchesoni2, and Franco Nori3,4 1 Universität Augsburg, Institut für Physik, Universitätsstrasse 1, 86135 Augsburg, Germany 2 Dipartimento di Fisica, Università di Camerino, 62032 Camerino, Italy 3 Frontier Research System, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama, 351-0198, Japan 4 Center for Theoretical Physics, Department of Physics, U...
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Abs t rac t . A unifying view on several astonishing effects induced by state dependent, uncorrelated fluctuations (multipficative white noise) is presented. The main emphasis of our introductory discussion is put on the basic physical mechanisms at work in a white noise driven "pulsating ratchet", noise-induced non-equilibrium phase transitions, and their synthesis in the form of coupled Brown...
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– The efficiency of different types of Brownian motors is calculated analytically and numerically. We find that motors based on flashing ratchets present a low efficiency and an unavoidable entropy production. On the other hand, a certain class of motors based on adiabatically changing potentials, named reversible ratchets, exhibit a higher efficiency and the entropy production can be arbitrari...
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ژورنال
عنوان ژورنال: Communications in Theoretical Physics
سال: 2014
ISSN: 0253-6102
DOI: 10.1088/0253-6102/62/4/08