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DY: Fachverband Dynamik und Statistische Physik

DY 59: Brownian Motion and Anomalous Diffusion

DY 59.1: Talk

Friday, March 22, 2024, 09:30–09:45, BH-N 334

Being heterogeneous is advantageous: Extreme Brownian non-Gaussian searches — •Vittoria Sposini — Faculty of Physics, University of Vienna, Vienna (Austria)

Diffusing diffusivity models, polymers in the grand canonical ensemble and polydisperse, and continuous time random walks, all exhibit stages of non-Gaussian diffusion. Is non-Gaussian targeting more efficient than Gaussian? In this talk I will show that non-Gaussian rare fluctuations in Brownian diffusion dominates extreme searches, introducing drastic corrections to the known Gaussian behavior. Our demonstration entails different physical systems and pinpoints the relevance of diversity within redundancy to boost fast targeting.

Joint work with Sankaran Nampoothiri, Aleksei Chechkin, Enzo Orlandini, Flavio Seno, and Fulvio Baldovin.

Keywords: Non-gaussian diffusion; Extreme first passage time