Comportamiento colectivo de sistemas heterog ́eneos de part ́ıculas auto-propulsadas

ALEJANDRO ROZENFELD; LEANDRO GUISANDEZ; BAGLIETTO G.; ALBANO E. V.

Congreso; 102 Reunión de la Asociación Física Argenti; 2017

We have considered a variation of the Vicsek model with vectorial noise where each oneof the agents have their own noise amplitude normally distributed around a mean value, µ,with standard deviation σ. First-order phase transition are observed for standard deviation0 ≤ σ < σtri ≈ 0.11, whereas for larger values, up to σ = 0.3, a continuous phase transitionoccurs. For values of σ in the interval 0.15 ≤ σ ≤ 0.30 the continuous nature of the observedtransition is characterized by means of finite-size scaling techniques, that also allow us toestimate the exponents driving the transition. A study of bands stability suggests that noband can form in this regime. Inspired by biological facts, the perception heterogeneity