Non-Gaussian noise without memory in active matter
English
Fodor, Etienne[University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
Hayakawa, Hisao[Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa-oiwake cho, Sakyo-ku, Kyoto 606-8502, Japan]
Tailleur, Julien[Laboratoire Matière et Systèmes Complexes, UMR No. 7057, CNRS/P7, Université Paris Diderot, 10 Rue Alice Domon et Léonie Duquet, 75205 Paris, Cedex 13, France]
Frederic, Van Wijland[Laboratoire Matière et Systèmes Complexes, UMR No. 7057, CNRS/P7, Université Paris Diderot, 10 Rue Alice Domon et Léonie Duquet, 75205 Paris, Cedex 13, France > > > ; Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa-oiwake cho, Sakyo-ku, Kyoto 606-8502, Japan]
ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
[en] Modeling the dynamics of an individual active particle invariably involves an isotropic noisy self-propulsion component, in the form of run-and-tumble motion or variations around it. This nonequilibrium source of noise is neither white-there is persistence-nor Gaussian. While emerging collective behavior in active matter has hitherto been attributed to the persistent ingredient, we focus on the non-Gaussian ingredient of self-propulsion. We show that by itself, that is, without invoking any memory effect, it is able to generate particle accumulation close to boundaries and effective attraction between otherwise repulsive particles, a mechanism which generically leads to motility-induced phase separation in active matter.
[University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
