Competition of spatial and temporal instabilities under time delay near codimension-two Turing-Hopf bifurcations

TL;DR

This paper investigates how time delay influences the competition between spatial and temporal patterns near Turing-Hopf bifurcations in reaction-diffusion systems, demonstrating control over pattern transitions.

Contribution

It reveals how time delay can modulate oscillation frequency, wave vector, and pattern intensities, enabling control over Turing and Hopf mode competition.

Findings

Time delay significantly alters oscillation frequency and wave vector.

Appropriate time delay can control Turing-Hopf pattern transitions.

Numerical simulations confirm analytical predictions.

Abstract

Competition of spatial and temporal instabilities under time delay near the codimension-two Turing-Hopf bifurcations is studied in a reaction-diffusion equation. The time delay changes remarkably the oscillation frequency, the intrinsic wave vector, and the intensities of both Turing and Hopf modes. The application of appropriate time delay can control the competition between the Turing and Hopf modes. Analysis shows that individual or both feedbacks can realize the control of the transformation between the Turing and Hopf patterns. Two dimensional numerical simulations validate the analytical results.