Noise induced new quasi-period and periods switching

TL;DR

This paper investigates how noise can induce new quasi-periodic behaviors and period switching in a genetic circuit model, revealing mechanisms behind noise-driven dynamic structures relevant to biological systems.

Contribution

It demonstrates noise-induced quasi-periods and period switching in a genetic circuit, providing theoretical insights and biological implications beyond deterministic models.

Findings

Noise induces a new quasi-periodic component in the model.

Quasi-periods become more stable with increased noise.

The study uncovers the mechanism of quasi-period formation and biological relevance.

Abstract

We employ a typical genetic circuit model to explore how noise can influence the dynamic structure. With the increase of a key interactive parameter, the model will deterministically go through two bifurcations and three dynamic structure regions. We find that a new quasi-periodic component, which is not allowed by deterministic dynamics, will be generated by noise inducing in the first two regions, and this quasi-period will be more and more stable along with the noise increasing. Especially, in the second region, the quasi-period will compete with a stable limit cycle and perform a new transient rhythm. Furthermore, we ascertain the entropy production rate (EPR) and the heat dissipation rate (HDR), and discover a minimal value with elucidating theoretically. In the end, we unveil the mechanism of the quasi-periods forming, and show a practical biological instance. We expect that this work is helpful to solve some biological or ecological problems, such as genetic origin of periodical cicadas and population dynamics with fluctuation.