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Area of Science:

  • Active Matter Physics
  • Statistical Mechanics
  • Biophysics

Background:

  • Run-and-tumble models are widely used for biological systems.
  • Recent research highlights
  • tumble-turn
  • dynamics with anisotropic 90° turns.

Purpose of the Study:

  • Investigate the consequences of
  • tumble-turn
  • anisotropy on particle dynamics.
  • Analyze short- and long-time scale effects.
  • Understand how local anisotropies scale to macroscopic levels.

Main Methods:

  • Agent-based simulations of self-propelled particles with angular potentials.
  • Modeling the interplay between rotational diffusion and aligning potentials.
  • Development of a simplified continuum theory.

Main Results:

  • Anisotropic dynamics alter the characteristic
  • tumble-turn
  • time, governing long-time behavior.
  • Normalized trajectories become independent of potential details.
  • Hydrodynamic limit retains anisotropic features at intermediate times.

Conclusions:

  • The transition to diffusive dynamics precedes isotropic dynamics.
  • Anisotropic single-particle features can be inherited by global system order.
  • This work aids understanding of how active systems generate macroscopic properties in anisotropic environments.