Aging and equilibration in bistable contagion dynamics
arXiv:2006.05937 · doi:10.1103/PhysRevE.102.042308
Abstract
We analyze the late-time relaxation dynamics for a general contagion model. In this model, nodes are either active or failed. Active nodes can fail either "spontaneously" at any time or "externally" if their neighborhoods are sufficiently damaged. Failed nodes may always recover spontaneously. At late times, the breaking of time-translation-invariance is a necessary condition for physical aging. We observe that time-translational invariance is lost for initial conditions that lie between the basins of attraction of the model's two stable stationary states. Based on corresponding mean-field predictions, we characterize the observed model behavior in terms of a phase diagram spanned by the fractions of spontaneously and externally failed nodes. For the square lattice, the phases in which the dynamics approaches one of the two stable stationary states are not linearly separable due to spatial correlation effects. Our results provide new insights into aging and relaxation phenomena that are observable in a model of social contagion processes.
arXiv comment10 pages, 6 figures
References in corpus (14)
- Epidemic processes in complex networks
- The Dynamics of Viral Marketing
- Inferring change points in the COVID-19 spreading reveals the effectiveness of interventions
- Critical behaviors in contagion dynamics
- On the critical behavior of the Susceptible-Infected-Recovered (SIR) model on a square lattice
- Disease-induced resource constraints can trigger explosive epidemics
- Impact of embedding on predictability of failure-recovery dynamics in networks
- Ageing phenomena without detailed balance: the contact process
- Connectivity disruption sparks explosive epidemic spreading
- Non-equilibrium relaxation in a stochastic lattice Lotka-Volterra model
- Ageing in the critical contact process: a Monte Carlo study
- The kinetic spherical model in a magnetic field
- Dynamical universality of the contact process
- The role of symmetry in the short-time critical dymamics