Hugues Chate: A Synchronization Viewpoint on Some Active Matter Results

Title: A Synchronization Viewpoint on Some Active Matter Results Abstract: After a brief update on our current understanding of simple active matter models, I will discuss some recent results on 2D dry aligning active matter from a synchronization viewpoint, taking the polarity of the self-propelled particles involved as the phase of an oscillator. I will focus on the simple case of polar particles aligning ferromagnetically, like in the Vicsek model, well-known to exhibit true long-range orientational order, i.e. phase synchronization in the presence of noise. I will in particular discuss the effect of chirality or Kuramoto-type disorder, and that of quenched spatial disorder, both of which have been found recently to be able destroy synchronization even if they are arbitrarily weak. References: [1] H. Chaté, Ann. Rev. Cond. Mat. Phys. 11, 189 (2020) [2] B. Ventejou, et al., Phys. Rev. Lett. 127, 238001 (2021) [3] D. Yu, et al., Phys. Rev. Lett. 126, 178001 (2021)