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Updated: Feb 7, 2026

Protocol for Isolating the Mouse Circle of Willis
Published on: October 22, 2016
Diffusion with resetting inside a circle
Abhinava Chatterjee1,2, Christos Christou1, Andreas Schadschneider1
1Institute for Theoretical Physics, University of Cologne, Zülpicher Straße 77, D-50937 Köln, Germany.
Abstract:
We study the Brownian motion of a particle in a bounded circular two-dimensional domain in search for a stationary target on the boundary of the domain. The process switches between two modes: one where it performs a two-dimensional diffusion inside the circle and one where it diffuses along the one-dimensional boundary. During the process, the Brownian particle resets to its initial position with a constant rate r. The Fokker-Planck formalism allows us to calculate the mean time to absorption (MTA) as well as the optimal resetting rate for which the MTA is minimized. From the derived analytical results the parameter regions where resetting reduces the search time can be specified. We also provide a numerical method for the verification of our results.
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