Efficiency of Brownian Motors
J.M.R. Parrondo, J.M. Blanco, F.J. Cao, and R. Brito (Universidad, Complutense de Madrid, Spain)
TL;DR
This paper compares the efficiency of various Brownian motors, showing that reversible ratchets outperform flashing ratchets by achieving higher efficiency and lower entropy production.
Contribution
It provides analytical and numerical analysis demonstrating the superior efficiency of reversible ratchets over flashing ratchets in Brownian motors.
Findings
Reversible ratchets have higher efficiency than flashing ratchets.
Flashing ratchets exhibit low efficiency and unavoidable entropy production.
Reversible ratchets can reduce entropy production arbitrarily.
Abstract
The efficiency of different types of Brownian motors is calculated analytically and numerically. We find that motors based on flashing ratchets present a low efficiency and an unavoidable entropy production. On the other hand, a certain class of motors based on adiabatically changing potentials, named reversible ratchets, exhibit a higher efficiency and the entropy production can be arbitrarily reduced.
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