INSTITUTO DE FISICA DE LIQUIDOS Y SISTEMAS BIOLOGICOS
Unidad Ejecutora - UE
congresos y reuniones científicas
Comparative study of Voter and Vicsek interactions in a mean-field flocking model
ERNESTO S. LOSCAR; G. BAGLIETTO; FEDERICO VAZQUEZ
Congreso; Statistical Mechanics of Swarming Behaviour; 2019
Iflysib-AR, MLU, DE
Different types of microscopic interactions between particles usually lead to different universality classes associated with the macroscopic properties of the system. More surprisingly, even two very similar interaction types may lead to very different macroscopic behaviors. In this work we investigate the change in the critical behavior of the Vicsek model when interactions are of voter-type, that is, when each particle adopts the moving direction of a randomly chosen neighbor.We study this dynamics in mean-field (all-to-all interactions) and found that, in the thermodynamic limit, voter interactions completely destroy order for any finite noise. Therefore, the order-disorder transition observed at a finite noise in Vicsek-type models is shifted to zero noise in voter-type models. Also, by applying standard finite-size scaling techniques we analyze the type and properties of this transition at zero noise.