Energetics of a forced thermal ratchet

Hideki Kamegawa, Tsuyoshi Hondou, Fumiko Takagi

Research output: Contribution to journalArticlepeer-review

85 Citations (Scopus)


We formulate energetics of the forced thermal ratchet [M. O. Magnasco, Phys. Rev. Lett. 71, 1477 (1993)] and evaluate its efficiency of energy transformation. We show that the presence of thermal fluctuation cannot increase the efficiency of the energy transformation in the original system of Magnasco, which is contrary to his claim that “There is a region of the operating regime where the efficiency is optimized at finite temperatures.” We also discuss the maximum efficiency of the forced thermal ratchet.

Original languageEnglish
Pages (from-to)5251-5254
Number of pages4
JournalPhysical review letters
Issue number24
Publication statusPublished - 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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