Subdiffusive Activity Spreading in the Diffusive Epidemic Process

Polovnikov, Borislav; Wilke, Patrick and Frey, Erwin (2022): Subdiffusive Activity Spreading in the Diffusive Epidemic Process. In: Physical Review Letters, Vol. 128, No. 7

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 long-standing debate about the theoretical classification of the system.

• Item Type: Journal article
• Faculties: Physics
• Subjects: 500 Science > 530 Physics
• ISSN: 0031-9007
• Language: English
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 491502892