摘要：Using video microscopy and computer simulations, we study the diffusion dynamics of colloidal particles in continuous potential energy landscapes at quasi-two-dimensions. The potential energy landscapes are constructed using scanning optical tweezers in the experiments, and the diffusion coefficients are extracted from the long-time mean squared displacements of tracer particles. We discover a universal relation that quantitatively determines the normalized long-time diffusion coefficient of a colloidal particle from the shape of the potential energy landscape, characterized by the Shannon information entropy SN and a generalized packing fraction phi. This relation is validated in a wide range of potential distributions, and over a large dynamic range. As all elemental diffusions can be considered as a dynamical process of exploring an external potential energy landscape by a diffusing particle, this universal law, which reduces multidimensional potential distributions to two dimensionless numbers, provides a quantitative tool to study dynamical phenomena in a wide range of complex environments, where general analytical or empirical models are lacking.

ISSN号：0031-9007

卷、期、页：卷135期23

发表日期：2025-12-05

影响因子：0.000000

期刊分区（SCI为中科院分区）：一区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：PHYSICAL REVIEW LETTERS

参与作者：Yu, Bohan,Chen, Ke

第一作者：宁鲁慧

论文类型：期刊论文

论文概要：Yu, Bohan,宁鲁慧,Chen, Ke，Universal Law for Diffusion in Continuous Potential Energy Landscapes，PHYSICAL REVIEW LETTERS，2025，卷135期23

论文题目：Universal Law for Diffusion in Continuous Potential Energy Landscapes