2003/07/02 by Bao-Quan Ai, Bao-quan Ai, Xian-Ju Wang +7
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Spectroscopy and Quantum Chemical Studies #physics.bio-ph #physics.gen-ph #stochastic dynamics and bifurcation
paper · pdf · doi:10.1103/physreve.68.061105
published as Phys. Rev. E 68(2003)061105 · 10 pages, 7 figures
arxiv created 2003/07/02 · openalex publication_date 2003/12/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The efficiency of a Brownian particle moving in a periodic potential in the presence of asymmetric unbiased fluctuations is investigated. We found that even on the quasistatic limit there is a regime where the efficiency can be a peaked function of temperature, which proves that thermal fluctuations facilitate the efficiency of energy transformation, contradicting the earlier findings [H. Kamegawa et al., Phys. Rev. Lett. 80, 5251 (1998)]. It is also found that the mutual interplay between temporal asymmetry and spatial asymmetry may induce optimized efficiency at finite temperatures. The ratchet is not most efficient when it gives maximum current.