Dynamics and steady states in excitable mobile agent systems.
We study the spreading of excitations in 2D systems of mobile agents where the excitation is transmitted when a quiescent agent keeps contact with an excited one during a nonvanishing time. We show that the steady states strongly depend on the spatial agent dynamics. Moreover, the coupling between exposition time (omega) and agent-agent contact rate (CR) becomes crucial to understand the excitation dynamics, which exhibits three regimes with CR: no excitation for low CR, an excited regime in which the number of quiescent agents (S) is inversely proportional to CR, and, for high CR, a novel third regime, model dependent, where S scales with an exponent xi-1, with xi being the scaling exponent of omega with CR.
Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, 01187 Dresden, Germany.
Fernando
F
Peruani
Gustavo J
GJ
Sibona
D003198:Computer Simulation; D016358:Contact Tracing; D004196:Disease Outbreaks; D004641:Emigration and Immigration; D004812:Epidemiologic Methods; D007239:Infections / Q000453:epidemiology* / Q000635:transmission; D008962:Models, Theoretical