Abstract In the past few years, attention has mainly been focused on the symmetric Brownian motor (BM) with Gaussian noises, whose current and energy conversion efficiency are very low. Here, we investigate the operating performance of the symmetric BM subjected to Lévy noise. Through numerical simulations, it is found that the operating performance of the motor can be greatly improved in asymmetric Lévy noise. Without any load, the Lévy noises with smaller stable indexes can let the motor give rise to a much greater current. With a load, the energy conversion efficiency of the motor can be enhanced by adjusting the stable indexes of the Lévy noises with symmetry breaking. The results of this research are of great significance for opening up BM's intrinsic physical mechanism and promoting the development of nanotechnology.
Fund: Project supported by the Research Group of Nonequilibrium Statistics (Grant No. 14078206) and Kunming University of Science and Technology, China.
Corresponding Authors:
Linru Nie
E-mail: lrnie@163.com
Cite this article:
Kao Jia(贾考), Lan Hu(胡兰), and Linru Nie(聂林如) Symmetric Brownian motor subjected to Lévy noise 2024 Chin. Phys. B 33 020502
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