论文标题
在活性浴中的迁移率和扩散系数之间的爱因斯坦关系上
On the Einstein relation between mobility and diffusion coefficient in an active bath
论文作者
论文摘要
一个由自我推广单元制成的活动浴是一种非平衡介质，其中迁移率$μ$与示踪剂粒子的扩散率$ d $之间的爱因斯坦关系$ d =μk_bt $无法预期持有先验性。我们在这里考虑这些系数可能与我们估计的相关函数有关的重型示踪剂。我们表明，在良好的近似值中，爱因斯坦的关系确实在使用不同温度通过示踪剂上的压力机械定义的不同温度时确实存在于活性浴中。
An active bath, made of self-propelling units, is a nonequilibrium medium in which the Einstein relation $D=μk_B T$ between the mobility $μ$ and the diffusivity $D$ of a tracer particle cannot be expected to hold a priori. We consider here heavy tracers for which these coefficients can be related to correlation functions which we estimate. We show that, to a good approximation, an Einstein relation does hold in an active bath upon using a different temperature which is defined mechanically, through the pressure exerted on the tracer.
