English

Synchronization and extinction in cyclic games with mixed strategies

Statistical Mechanics 2015-05-25 v2 Populations and Evolution

Abstract

We consider cyclic Lotka-Volterra models with three and four strategies where at every interaction agents play a strategy using a time-dependent probability distribution. Agents learn from a loss by reducing the probability to play a losing strategy at the next interaction. For that, an agent is described as an urn containing β\beta balls of three respectively four types where after a loss one of the balls corresponding to the losing strategy is replaced by a ball representing the winning strategy. Using both mean-field rate equations and numerical simulations, we investigate a range of quantities that allow us to characterize the properties of these cyclic models with time-dependent probability distributions. For the three-strategy case in a spatial setting we observe a transition from neutrally stable to stable when changing the level of discretization of the probability distribution. For large values of β\beta, yielding a good approximation to a continuous distribution, spatially synchronized temporal oscillations dominate the system. For the four-strategy game the system is always neutrally stable, but different regimes emerge, depending on the size of the system and the level of discretization.

Keywords

Cite

@article{arxiv.1503.00058,
  title  = {Synchronization and extinction in cyclic games with mixed strategies},
  author = {Ben Intoy and Michel Pleimling},
  journal= {arXiv preprint arXiv:1503.00058},
  year   = {2015}
}

Comments

26 pages, 8 figures, version accepted for publication in the Physical Review E

R2 v1 2026-06-22T08:40:19.893Z