Density fluctuations of two-dimensional active-passive mixtures  

作　　者：Jian Zhang Tao Huang Guoqing Xu Yong Chen 

机构地区：[1]Center of Soft Matter Physics and Its Applications,Beihang University,Beijing 100191,China [2]School of Physics,Beihang University,Bejing 100191,China [3]Faculty of Science,Kunming University of Science and Technology,Kunming 650093,China

出　　处：《Communications in Theoretical Physics》2022年第7期123-128,共6页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China with Grant No.12075017;by the high performance computing resources at Beihang University。

摘　　要：Dimension-dependent giant density fluctuations are a typical feature of active matter systems. In this work, we study the density fluctuation in two-dimensional mixtures of active and passive particles by Brownian dynamics simulations. The boundary of motility-induced phase separation is determined by the transition from unimodal to bimodal density distribution. A rapid increase of the fluctuation exponent near the boundary of phase separation in the plane of density and Péclet number was observed. When phase separation occurs, the fluctuation exponent is an approximate constant of 0.85.

关 键 词：active particle FLUCTUATION phase separation 

分 类 号：O411[理学—理论物理]