The law of action and reaction for the effective force in a non-equilibrium colloidal system

Kumiko Hayashi, Shin Ichi Sasa

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

We study a non-equilibrium Langevin many-body system containing two 'test' particles and many 'background' particles. The test particles are spatially confined by a harmonic potential, and the background particles are driven by an external driving force. Using numerical simulations of the model, we formulate an effective description of the two test particles in a non-equilibrium steady state. In particular, we investigate several different definitions of the effective force acting between the test particles. We find that the law of action and reaction does not hold for the total mechanical force exerted by the background particles, but that it does hold for the thermodynamic force defined operationally on the basis of an idea used to extend the first law of thermodynamics to non-equilibrium steady states.

Original languageEnglish
Pages (from-to)2825-2836
Number of pages12
JournalJournal of Physics Condensed Matter
Volume18
Issue number10
DOIs
Publication statusPublished - 2006 Mar 15

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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