Decomposition of force fluctuations far from equilibrium

Kumiko Hayashi, Shin Ichi Sasa

Research output: Contribution to journalReview articlepeer-review

11 Citations (Scopus)


By studying a nonequilibrium Langevin system, we find that a simple condition determines the decomposition of the coarse-grained force into a dissipative force, an effective driving force and noise. From this condition, we derive a universal inequality, D ≥ γμ d 2T, relating the diffusion constant D, the differential mobility μ d, the bare friction constant γ and the temperature T. Due to the general nature of the argument we present, we believe that our idea concerning this decomposition can be applied to a wide class of systems far from equilibrium.

Original languageEnglish
Article number020102
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Issue number2
Publication statusPublished - 2005 Feb 1
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics


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