Ornstein-Uhlenbeck information particle: A new candidate of active agent
Abstract
An information particle can acquire active-like motion through transforming the information entropy into effective self-propulsion velocity/force using the attached information engine. We consider an underdamped Brownian particle additionally driven by either a constant self-propulsion force or an information engine using Ornstein-Uhlenbeck (OU) bath feedback control, such particles are called self-propelled particle (SPP) or OU information particle (OUIP). Compared to the widely-investigated SPP, the OUIP shows a significant different dynamical pattern, including two types of moving mode: a slow-speed diffusion mode and a high-speed traveling mode. The specific evolution of OUIP can be adjusted flexibly between such two modes through the inertial effect, thus acquiring a rich and non-trivial motion behavior. By tuning the strength of fluctuation of the OU bath, a wide range of net velocity can be achieved for OUIP. We highlight that OUIP could be an exceptional candidate for active agent.
Keywords
Cite
@article{arxiv.2602.06340,
title = {Ornstein-Uhlenbeck information particle: A new candidate of active agent},
author = {Xin Song and Xiji Shao and Yanwen Zhu and Cheng Yang and Linli He and Shigeyuki Komura and Zhanglin Hou},
journal= {arXiv preprint arXiv:2602.06340},
year = {2026}
}
Comments
8 pages, 5 figures including 3 figures in main text and 2 figures in Appendix