论文标题
在活动环境中的波动运动
Fluctuating motion in an active environment
论文作者
论文摘要
我们在弱耦合与“活”培养基中的探针的波动动力学得出，该培养基被建模为具有活跃的Ornstein-Uhlenbeck动力学的粒子。对波动解剖关系的非隔离性校正是根据活性培养基中的时间相关性明确写出的。第一项由于活性介质的持续存在而改变了探针的惯性质量。第二个更正修改了摩擦内核。由此产生的广义Langevin方程基准测试了浸入活性培养基和被动培养基中的探针上诱导的运动。该派生使用非平衡响应理论。
We derive the fluctuation dynamics of a probe in weak coupling with a "living" medium, modeled as particles undergoing an active Ornstein-Uhlenbeck dynamics. Nondissipative corrections to the fluctuation-dissipation relation are written out explicitly in terms of time-correlations in the active medium. A first term changes the inertial mass of the probe, as a consequence of the persistence of the active medium. A second correction modifies the friction kernel. The resulting generalized Langevin equation benchmarks the motion induced on probes immersed in active versus passive media. The derivation uses nonequilibrium response theory.
