Barrier-Controlled Non-Equilibrium Criticality in Reactive Particle Systems
Abstract
Non-equilibrium critical phenomena generally exist in many dynamic systems, like chemical reactions and some driven-dissipative {reactive} particle systems. Here, by using computer simulation and theoretical analysis, we demonstrate the crucial role of the activation barrier on the criticality of dynamic phase transitions in a minimal reactive hard-sphere model. We find that at zero thermal noise, with increasing the activation barrier, the type of transition changes from a continuous conserved directed percolation into a discontinuous dynamic transition by crossing a \emph{tricritical} point. A mean-field theory combined with field-simulation is proposed to explain this phenomenon. The possibility of Ising-type criticality in the non-equilibrium system at finite thermal noise is also discussed.
Cite
@article{arxiv.2006.08075,
title = {Barrier-Controlled Non-Equilibrium Criticality in Reactive Particle Systems},
author = {Qun-Li Lei and Hao Hu and Ran Ni},
journal= {arXiv preprint arXiv:2006.08075},
year = {2021}
}