Emergence of ultradiscrete states due to phase lock caused by saddle-node bifurcation in discrete limit cycles

Author:

Yoshihiro Yamazaki, Shousuke Ohmori

Keyword:

Nonlinear Sciences, Adaptation and Self-Organizing Systems, Adaptation and Self-Organizing Systems (nlin.AO), Dynamical Systems (math.DS)

journal:

date:

2023-05-12 16:00:00

Abstract

Dynamical properties of limit cycles in a tropically discretized negative feedback model are numerically investigated. This model has a controlling parameter $\tau$, which corresponds to time interval for the time evolution of phase in the limit cycles. By considering $\tau$ as a bifurcation parameter, we find that ultradiscrete state emerges due to phase lock caused by saddle-node bifurcation. Furthermore, focusing on limit cycles for the max-plus negative feedback model, it is found that the unstable limit cycle in the max-plus model corresponds to the unstable fixed points emerging by the saddle-node bifurcation in the tropically discretized model.

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