Bell-Davies Miranda C R, Curran Arran, Liu Yanyan, Dullens Roel P A
Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom.
Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
Phys Rev E. 2023 Jun;107(6-1):064601. doi: 10.1103/PhysRevE.107.064601.
We perform feedback experiments and simulations in which a colloidal dumbbell particle, acting as a particle on a ring, is followed by a repulsive optical trap controlled by a continuous-time-delayed feedback protocol. The dynamics are described by a persistent random walk similarly to that of an active Brownian particle, with a transition from predominantly diffusive to driven behavior at a critical delay time. We model the dynamics in the short and long delay regimes using stochastic delay differential equations and derive a condition for stable driven motion. We study the stochastic thermodynamic properties of the system, finding that the maximum work done by the trap coincides with a local minimum in the mutual information between the trap and the particle position at the onset of stable driven dynamics.
我们进行了反馈实验和模拟，其中一个胶体哑铃粒子作为环上的粒子，由连续时间延迟反馈协议控制的排斥光阱跟踪。动力学由持续随机游走描述，类似于活性布朗粒子的动力学，在临界延迟时间从主要的扩散行为转变为驱动行为。我们使用随机延迟微分方程对短延迟和长延迟区域的动力学进行建模，并推导了稳定驱动运动的条件。我们研究了系统的随机热力学性质，发现光阱所做的最大功与稳定驱动动力学开始时光阱与粒子位置之间互信息的局部最小值一致。
