Feynman's ratchet and pawl: an exactly solvable model

Details Feynman's ratchet and pawl: an exactly solvable model Feynman's ratchet and pawl: an exactly solvable model

1999-02-03

arxiv.org/abs/cond-mat/9902056v2

Phys.Rev.E 59, 6448 (1999)

Physics

Condensed Matter

Statistical Mechanics

19 pages + 10 figures; somewhat tighter presentation

Scientific paper

10.1103/PhysRevE.59.6448

We introduce a simple, discrete model of Feynman's ratchet and pawl, operating between two heat reservoirs. We solve exactly for the steady-state directed motion and heat flows produced, first in the absence and then in the presence of an external load. We show that the model can act both as a heat engine and as a refrigerator. We finally investigate the behavior of the system near equilibrium, and use our model to confirm general predictions based on linear response theory.

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