Efficiency optimization in a correlation ratchet with asymmetric unbiased fluctuations

Abstract

The efficiency of a Brownian particle moving in periodic potential in the presence of asymmetric unbiased fluctuations is investigated. We found that 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 (1998) 5251). It is also found that the mutual interplay between asymmetry of fluctuation and asymmetry of the potential may induce optimized efficiency at finite temperature. The ratchet is not most efficiency when it gives maximum current.

10 pages, 7 figures

References in corpus (9)

• Reducing vortex density in superconductors using the ratchet effect
• Correlated noise in a logistic growth model
• Temporally Asymmetric Fluctuations are Sufficient for the Operation of a Correlation Ratchet
• Ratchet Effect in Surface Electromigration: Smoothing Surfaces by an ac Field
• Energetics of Forced Thermal Ratchet
• Thermal Noise Can Facilitate Energy Conversion by Ratchet System?
• Motion in a rocked ratchet with spatially periodic friction
• Energetics of rocked inhomogeneous ratchets
• A Microscopic Mechanism for Muscle's Motion

Cited by in corpus (10)

• Current in a three-dimensional periodic tube with unbiased forces
• Heat Flow and Efficiency in a Microscopic Engine
• Brownian rectifiers in the presence of temporally asymmetric unbiased forces
• Thermal noise can facilitate energy transformation in the presence of entropic barriers
• Phase shift induces currents in a periodic tube
• Transport Reversal in a Thermal Ratchet
• Efficiency and Current in a correlated ratchet
• Reorganization of a 2D disordered granular medium due to a small local cyclic perturbation
• Enhanced thermodynamic efficiency in time asymmetric ratchets
• Brownian motors: Joint effect of non-Gaussian noise and time asymmetric forcing