Kinetic temperature and pressure of an active Tonks gas

Elijah Schiltz-Rouse, Hyeongjoo Row, Stewart A. Mallory

Research output: Contribution to journalArticlepeer-review


Using computer simulation and analytical theory, we study an active analog of the well-known Tonks gas, where active Brownian particles are confined to a periodic one-dimensional (1D) channel. By introducing the notion of a kinetic temperature, we derive an accurate analytical expression for the pressure and clarify the paradoxical behavior where active Brownian particles confined to 1D exhibit anomalous clustering but no motility-induced phase transition. More generally, this work provides a deeper understanding of pressure in active systems as we uncover a unique link between the kinetic temperature and swim pressure valid for active Brownian particles in higher dimensions.

Original languageEnglish (US)
Article number064601
JournalPhysical Review E
Issue number6
StatePublished - Dec 2023

All Science Journal Classification (ASJC) codes

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

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