Subdiffusive Activity Spreading in the Diffusive Epidemic Process

Abstract

The diffusive epidemic process is a paradigmatic example of an absorbing state phase transition in which healthy and infected individuals spread with different diffusion constants. Using stochastic activity spreading simulations in combination with finite-size scaling analyses we reveal two qualitatively different processes that characterize the critical dynamics: subdiffusive propagation of infection clusters and diffusive fluctuations in the healthy population. This suggests the presence of a strong-coupling regime and sheds new light on a longstanding debate about the theoretical classification of the system.

arXiv comment6 pages, 5 figures

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Cited by in corpus (5)

• Field theories and quantum methods for stochastic reaction-diffusion systems
• Transition from Susceptible-Infected to Susceptible-Infected-Recovered Dynamics in a Susceptible-Cleric-Zombie-Recovered Active Matter Model
• Critical behavior of the diffusive susceptible-infected-recovered model
• Tricritical behavior in epidemic dynamics with vaccination
• Effects of lattice dilution on the non-equilibrium phase transition in the stochastic Susceptible-Infectious-Recovered model