Stochastic resetting on comb-like structures

Abstract

We study a diffusion process on a three-dimensional comb under stochastic resetting. We consider three different types of resetting: global resetting from any point in the comb to the initial position, resetting from a finger to the corresponding backbone and resetting from secondary fingers to the main fingers. The transient dynamics along the backbone in all three cases is different due to the different resetting mechanisms, finding a wide range of dynamics for the mean squared displacement. For the particular geometry studied herein, we compute the stationary solution and the mean square displacement and find that the global resetting breaks the transport in the three directions. Regarding the resetting to the backbone, the transport is broken in two directions but it is enhanced in the main axis. Finally, the resetting to the fingers enhances the transport in the backbone and the main fingers but reaches a steady value for the mean squared displacement in the secondary fingers.

Submitted to Physical Review Research (12/12/19)

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• Extremal statistics for stochastic resetting systems
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• Capture of a diffusing lamb by a diffusing lion when both return home
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• Biased random walk on random networks in presence of stochastic resetting: Exact results
• First passage in discrete-time absorbing Markov chains under stochastic resetting
• Dynamics of soft interacting particles on a comb