Forcing inertial Brownian motors: Efficiency and negative differential mobility |
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| Institution: | 1. Institute of Physics, University of Augsburg, Universitätsstrasse 1, D-86135 Augsburg, Germany;2. Institute of Physics, University of Silesia, P-40-007 Katowice, Poland;1. Centro Atómico Bariloche and Instituto Balseiro, San Carlos de Bariloche, 8400 Río Negro, Argentina;2. Centro Atómico Bariloche and Instituto Balseiro, San Carlos de Bariloche, 8400 Río Negro, Argentina;1. Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China;2. Faculty of Science, Honghe University, Mengzi 661100, China;3. Information Technology Center, Honghe University, Mengzi 661100, China |
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| Abstract: | 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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