Key Laboratory of Artificial Microstructures in Yunnan Higher Education Institutions, School of Physical Science and Technology, Kunming University, Kunming, China.
PLoS One. 2024 Mar 4;19(3):e0298466. doi: 10.1371/journal.pone.0298466. eCollection 2024.
The motion of a single active particle in one dimension with quenched disorder under the external force is investigated. Within the tailored parameter range, anomalous diffusion that displays weak ergodicity breaking is observed, i.e., non-ergodic subdiffusion and non-ergodic superdiffusion. This non-ergodic anomalous diffusion is analyzed through the time-dependent probability distributions of the particle's velocities and positions. Its origin is attributed to the relative weights of the locked state (predominant in the subdiffusion state) and running state (predominant in the superdiffusion state). These results may contribute to understanding the dynamical behavior of self-propelled particles in nature and the extraordinary response of nonlinear dynamics to the externally biased force.
本文研究了在外部力作用下一维单活性粒子在淬火无序下的运动。在所定制的参数范围内，观察到了表现出弱遍历破坏的异常扩散，即非遍历亚扩散和非遍历超扩散。通过粒子速度和位置的时变概率分布对这种非遍历异常扩散进行了分析。其起源归因于锁定态（在亚扩散态中占主导地位）和运行态（在超扩散态中占主导地位）的相对权重。这些结果可能有助于理解自然界中自推进粒子的动力学行为以及非线性动力学对外部偏置力的异常响应。
