We model a binary mixture of passive and active Brownian particles in two dimensions using the effective interaction between passive particles in the active bath. The activity of active particles and the size ratio of two types of particles are two control parameters in the system. The effective interaction is calculated from the average force on two particles generated by the active particles. The effective interaction can be attractive or repulsive, depending on the system parameters. The passive particles form four distinct structural orders for different system parameters viz; disorder (D), disordered cluster (DC), ordered cluster (OC), and poly-crystalline order (P C). The change in structure is dictated by the change in nature of the effective interaction. We further confirm the four structures using full microscopic simulation of active and passive mixture. Our study is useful to understand the different collective behaviour in non-equilibrium systems.
Odd dynamics of passive objects in a chiral active bath
Laboratoire Matière et Systèmes Complexes (MSC), Université Paris Cité & CNRS (UMR 7057)（复杂物质与系统实验室，巴黎西岱大学 & 法国国家科学研究中心）；Department of Applied Physics, Stanford University（斯坦福大学应用物理系）；Department of Physics, Massachusetts Institute of Technology（麻省理工学院物理系）；Yukawa Institute for Theoretical Physics, Kyoto University（京都大学汤川理论物理研究所）
Poisson-shot-noise hybrid machines: efficiency and quasistatic divergence
Indian Institute of Technology Delhi（印度理工学院德里分校）；Okinawa Institute of Science and Technology (OIST)（冲绳科学技术大学院大学）；ICTP – The Abdus Salam International Centre for Theoretical Physics（阿卜杜斯·萨拉姆国际理论物理中心）；Scuola Internazionale Superiore di Studi Avanzati（国际高等研究院）；Institute of Physics & Astronomy, University of Potsdam（波茨坦大学物理与天文学研究所）
Granular fluid thermostatted by a bath of elastic hard spheres
通过对（空间均匀）Enskog-Boltzmann方程的第一Sonine近似，分析了浸入保持平衡的弹性硬球浴中的非弹性硬球流体的均匀稳态。相对于浴温的颗粒流体的温度和颗粒分布函数的峰度作为恢复系数、质量比和测量相对于摩擦常数的冷却速率的无量纲参数$β$的函数而获得。与最近从Enskog-Boltzmann方程的迭代数值解获得的结果的比较[Biben等人，Physica A 310，308（202）]显示了极好的一致性。还考虑了几种极限情况。特别是，当粒状颗粒比浴颗粒重得多（但具有可比的尺寸和数密度），它表明，浴作为一个白噪声外部驱动。在一般情况下，如果控制参数$β$大于取决于恢复恢复系数和质量比的某个临界值$β_c$，则Sonine近似预测缺乏稳态。然而，这种现象出现在近似的预期适用范围之外。
A quantum statistical mechanics model of a three dimensional linear rigid rotator in a bath of oscillators: IV - steady state dielectric properties induced by a. c. and d. c. field coupling
