Abstract
A set of coupled Brownian motors—resulting from a noise-induced phase transition generated through an entropic mechanism, and formerly studied in mean-field approximation—is numerically integrated by Heun’s method. The results add much insight to the mean-field ones, allowing interpretation of the underlying mechanisms. It turns out that the low-noise boundary of the ordered phase obtained in mean-field approximation lies near a region where the order parameter is negative. Hints of bistability and negative mobility around F = 0 are seen in two cases, and anomalous hysteresis is confirmed in one case.
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Contribution to the Topical Issue “The Physics of Micro-Energy Use and Transformation”, edited by Luca Gammaitoni.
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Peña Rosselló, J.I., Deza, R.R. & Wio, H.S. Coupled Brownian motors. Eur. Phys. J. B 91, 103 (2018). https://doi.org/10.1140/epjb/e2018-80624-9
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DOI: https://doi.org/10.1140/epjb/e2018-80624-9