Bulletin of the American Physical Society
APS March Meeting 2023
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session N00: Poster Session II (11am-2pm PST)
Wednesday, March 8, 2023
Room: Exhibit Hall (Forum Ballroom)
Sponsoring Unit: APS
Abstract: N00.00188 : Active Ornstein-Uhlenbeck particles: a versatile model for self-propelled motion*
G. H. Philipp Nguyen
Alexander R Sprenger
Umberto Marini Bettolo Marconi
(Università di Camerino)
Here, we introduce a parental active model (PAM) based on a general stochastic process with fluctuating self-propulsion velocity, within which both ABPs and AOUPs emerge as limiting cases, i.e., they are rather sisters than cousins. We then demonstrate that a position-dependent swim-velocity field can be consistently introduced for any self-propulsion mechanism. As an application, we discuss the effects of varying self propulsion in external confinement and predict the stationary properties using effective interactions.
Both ABPs and AOUPs have been originally developed to model the overdamped dynamics of microscopic active particles. However, the recent interest in macroscopic active systems generates the need to develop manageable theoretical descriptions of inertial effects. For AOUPs with translational inertia we provide exact analytical solutions for dynamical correlation functions considering an active dimer, a time-dependent mass and various external forces. Finally, we discuss effects of rotational inertia.
*Funded by the Deutsche Forschungsgemeinschaft (DFG) through the SPP 2265, under grant numbers WI 5527/1-1 and LO 418/25-1.
Become an APS Member
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700