论文标题
被动示踪剂在手性活性流体中的奇数迁移率
Odd mobility of a passive tracer in a chiral active fluid
论文作者
论文摘要
手性活性流体破坏了时间逆转和平等对称性，导致普通的被动流体无法观察到异国的传输现象。我们开发了一种广义的绿色关系，用于悬浮在二维手性活性流体中的被动示踪剂所经历的异常升力，并受到施加力。这种异常升力的特征是传输系数称为奇数迁移率。我们使用分子动力学模拟验证了广义响应理论，我们表明，可以从示踪剂 - 流体密度分布函数的不对称变形方面机械理解不对称示踪剂迁移率。我们表明，示踪剂大小的速度不同，迁移率的均匀成分和奇数成分，表明使用手性活性工作流体进行基于尺寸的粒子分离的可能性。
Chiral active fluids break both time-reversal and parity symmetry, leading to exotic transport phenomena unobservable in ordinary passive fluids. We develop a generalized Green-Kubo relation for the anomalous lift experienced by a passive tracer suspended in a two-dimensional chiral active fluid subjected to an applied force. This anomalous lift is characterized by a transport coefficient termed the odd mobility. We validate our generalized response theory using molecular dynamics simulations, and we show that the asymmetric tracer mobility may be understood mechanically in terms of asymmetric deformations of the tracer-fluid density distribution function. We show that the even and odd components of the mobility decay at different rates with tracer size, suggesting the possibility of size-based particle separation using a chiral active working fluid.
