Steffenoni Stefano, Kroy Klaus, Falasco Gianmaria
Max Planck Institute for Mathematics in the Sciences, Inselstrasse 22, 04103 Leipzig, Germany.
Institut für Theoretische Physik, Universität Leipzig, Postfach 100 920, D-04009 Leipzig, Germany.
Phys Rev E. 2016 Dec;94(6-1):062139. doi: 10.1103/PhysRevE.94.062139. Epub 2016 Dec 28.
We set up a mesoscopic theory for interacting Brownian particles embedded in a nonequilibrium environment, starting from the microscopic interacting many-body theory. Using nonequilibrium linear-response theory, we characterize the effective dynamical interactions on the mesoscopic scale and the statistics of the nonequilibrium environmental noise, arising upon integrating out the fast degrees of freedom. As hallmarks of nonequilibrium, the breakdown of the fluctuation-dissipation and action-reaction relations for Brownian degrees of freedom is exemplified with two prototypical models for the environment, namely active Brownian particles and stirred colloids.
我们从微观相互作用多体理论出发，建立了一个适用于嵌入非平衡环境中相互作用布朗粒子的介观理论。利用非平衡线性响应理论，我们刻画了介观尺度上的有效动力学相互作用以及在对快速自由度进行积分时产生的非平衡环境噪声的统计特性。作为非平衡的标志，布朗自由度的涨落耗散关系和作用反作用关系的失效在环境的两个典型模型中得到了例证，即活性布朗粒子和搅拌胶体。
