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Phase Transitions In The Collective Motion Of Self-Propelled Individuals

Author

Listed:
  • GABRIEL BAGLIETTO

    (Instituto de Investigaciones Fisicoqímicas Teóricas y Aplicatas (INIFTA), Sucursal 4, Casilla de Correo 16 (1900) La Plata, Argentina)

  • EZEQUIEL V. ALBANO

    (Instituto de Investigaciones Fisicoqímicas Teóricas y Aplicatas (INIFTA), Sucursal 4, Casilla de Correo 16 (1900) La Plata, Argentina)

Abstract

A model for the displacement of self-driven organisms is studied by means of extensive computer simulations. Local interactions influenced by noisy communications among organisms, leads to the onset of collective motion at low noise levels. When the noise is increased the system undergoes first-order transitions into disordered states of motion. We have also studied the relaxation process between these states. By fitting the time dependence of the order parameter when the system is annealed from a state below coexistence to another above it, we conclude that the relaxation can be well described by means of a stretched exponential. In this way the characteristic relaxation times are obtained.

Suggested Citation

  • Gabriel Baglietto & Ezequiel V. Albano, 2006. "Phase Transitions In The Collective Motion Of Self-Propelled Individuals," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 17(03), pages 395-402.
    • Handle: RePEc:wsi:ijmpcx:v:17:y:2006:i:03:n:s0129183106008492
    DOI: 10.1142/S0129183106008492
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