2024/07/29 by A. Upadhyaya, Upadhyaya, Alakesh, VS Akella +1 · 2 citations
Earth and Planetary Sciences · Mathematics · #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Geological formations and processes #Soft Condensed Matter (cond-mat.soft) #Stochastic processes and statistical mechanics
paper · pdf · doi:10.48550/arxiv.2407.20140
openalex publication_date 2024/07/29 · openalex created_date 2024/08/01 · openalex updated_date 2026/07/28
We report an experimental investigation on the stochastic migration dynamics of Marangoni surfers (camphor-infused paper disks) between the two lobes of a dumbbell-shaped chamber. We characterize the migration dynamics using survival analysis for a given configuration with a unique disk count in each lobe. Qualitatively, all the configurations exhibit stretched exponential decay with time, ascribed to a disk s aging. A given configuration s stability decreases with increasing pairwise interactions. The most stable configuration is always the one with equal partitioning of disks between the lobes, i.e., exactly one-half of disks in each lobe for even-numbered systems but with one extra disk in either of the lobes for odd-numbered systems. Furthermore, we model a camphor disk as a Chiral Active Particle (CAP), as initially proposed by Cruz et al. and show that decreasing motility (or aging) indeed causes the stretched exponential behavior.