Field-theoretic model for chemotaxis in run and tumble particles

Purba Chatterjee, Nigel Goldenfeld

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we develop a field-theoretic description for run and tumble chemotaxis, based on a density-functional description of crystalline materials modified to capture orientational ordering. We show that this framework, with its in-built multiparticle interactions, soft-core repulsion, and elasticity, is ideal for describing continuum collective phases with particle resolution, but on diffusive timescales. We show that our model exhibits particle aggregation in an externally imposed constant attractant field, as is observed for phototactic or thermotactic agents. We also show that this model captures particle aggregation through self-chemotaxis, an important mechanism that aids quorum-dependent cellular interactions.

Original languageEnglish (US)
Article number032603
JournalPhysical Review E
Volume103
Issue number3
DOIs
StatePublished - Mar 2021

ASJC Scopus subject areas

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

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