Ornstein-Uhlenbeck information particle: A new candidate of active agent

Xin Song; Xiji Shao; Yanwen Zhu; Cheng Yang; Linli He; Shigeyuki Komura; Zhanglin Hou

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arXiv · 2602.06340

Ornstein-Uhlenbeck information particle: A new candidate of active agent

Xin Song·Xiji Shao·Yanwen Zhu·Cheng Yang·Linli He·Shigeyuki Komura·Zhanglin Hou

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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.

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Xin Song, Xiji Shao, Yanwen Zhu, Cheng Yang, Linli He, Shigeyuki Komura, Zhanglin Hou. 2026-02-06. Ornstein-Uhlenbeck information particle: A new candidate of active agent. https://arxiv.org/abs/2602.06340

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