Irreversible Operation in a Stalled State of Feynman's Ratchet

Tsuyoshi Hondou, Fumiko Takagi

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


We consider the Langevin dynamics which describes the transducer of thermal fluctuation into mechanical work. In the frame of Feynman's ratchet, we prove that irreversiblity is unavoidable in operating the transducer if the system is described by the conventional Langevin equation with two degrees of freedom, where the degrees correspond to two heat baths of different temperatures.

Original languageEnglish
Pages (from-to)2974-2976
Number of pages3
JournalJournal of the Physical Society of Japan
Issue number9
Publication statusPublished - 1998 Sept


  • Efficiency
  • Energetics
  • Entropy
  • Feynman's ratchet
  • Ratchet


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