报告题目:Ergodic property of Langevin systems with random diffusivity

报告人：王旭东（南京理工大学数学与统计学院）

报告时间：2022年10月4日下午3:00-4:00

报告地点：广A106教室

报告摘要: Brownian yet non-Gaussian diffusion has recently been observed in numerous biological and active matter system. The cause of the non-Gaussian distribution have been elaborately studied in the idea of a superstatistical dynamics or a diffusing diffusivity. Based on a random diffusivity model, we here focus on the ergodic property and the scatter of the amplitude of time-averaged mean-squared displacement (TAMSD). We find that ensemble-averaged TAMSDs are always normal while ensemble-averaged mean-squared displacement can be anomalous. Further, the scatter of dimensionless amplitude is completely determined by the time average of diffusivity. Our results are valid for arbitrary random diffusivity.

报告人简介：王旭东，男，南京理工大学数学与统计学院讲师，主要关注物理和生物领域的反常扩散现象，从事随机模型、算法与应用方面的研究。在Physical Review E等国际知名期刊上发表论文十余篇，主持一项国家自然科学基金。

邀请人：王万里