Nonequilibrium statistical mechanics of self-propelled hard rods

Aparna Baskaran, Cristina M. Marchetti

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


Using tools of nonequilibrium mechanics, we study a model of self-propelled hard rods on a substrate in two dimensions to quantify the interplay of self-propulsion and excluded-volume effects. We derive a Smoluchowski equation for the configurational probability density of self-propelled rods that contains several modifications as compared to the familiar Smoluchowski equation for thermal rods. As a side-product of our work, we also present a purely dynamical derivation of the Onsager form of the mean-field excluded-volume interaction among thermal hard rods.

Original languageEnglish (US)
Article numberP04019
JournalJournal of Statistical Mechanics: Theory and Experiment
Issue number4
StatePublished - 2010


  • Boltzmann equation
  • Self-propelled particles

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Statistics, Probability and Uncertainty


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