Nagoya University
Theoretical Elementary Particle Physics Laboratory

Date&Time Tue Jul 21 2020 (17:00 - 18:00)
Kunimasa Miyazaki
Affiliation Nagoya U
Title Anomalous and Glassy Dynamics of a Simple Active Matter
Abstract Active matters are simple physical models which mimic collective behaviors of biological systems such as flocks, schools, and swirls (of birds, fishes, and maybe human beings). They are also ideal bench models to assess the effects of nonequilibrium fluctuations at microscopic levels on the collective dynamics and structures at macroscopic levels. In this talk, we present two numerical results on one of the simplest active matter models called the Active Ornstein-Uhlenbeck model (AOUP). In the first part, we discuss slow dynamics near the glass transition point at relatively high activity parameters. Dynamic heterogeneities and slow dynamics are shown to be strongly correlated with collective dynamics. In the second part, we generalize the AOUP model to seamlessly bridge the nonequilibrium system with the equilibrium but non-Markovian dynamical systems. We discover an anomalous structural correlation, called hyperuniformity, for a set of parameter space.