2019/12/04 by J. Quetzalcóatl Toledo-Marín, Toledo-Marin, J. Quetzalcoatl, Denis Boyer +3
Biochemistry, Genetics and Molecular Biology · #Diffusion and Search Dynamics
paper · pdf · doi:10.48550/arxiv.1912.02141
We analyze predator-prey dynamics in one dimension in which a Brownian predator adopts a chasing strategy that consists in stochastically resetting its current position to locations previously visited by a diffusive prey. We study three different chasing strategies, namely, active, uniform and passive which lead to different diffusive behaviors of the predator in the absence of capture. When capture is considered, regardless of the chasing strategy, the mean first-encounter time is finite and decreases with the resetting rate. This model illustrates how the use of cues significantly improves the efficiency of random searches. We compare numerical simulations with analytical calculations and find excellent agreement.