Emergent behaviors of homogeneous Lohe Hermitian sphere particles under time-delayed interactions

TL;DR

This paper investigates how time delays and nonlinear coupling influence the collective behavior of particles on the complex Hermitian sphere, revealing conditions for aggregation and emergent phenomena in the Lohe Hermitian sphere model.

Contribution

It introduces a framework for understanding emergent aggregation in the LHS model with time delays, especially near the Stuart-Landau coupling regime, using Lyapunov functionals.

Findings

Emergent aggregation occurs near the Stuart-Landau coupling case.

Time delays and nonlinear coupling significantly affect collective dynamics.

Frameworks for complete and practical aggregation are established.

Abstract

We study emergent behaviors of the Lohe hermitian sphere(LHS) model with a time-delay for a homogeneous ensemble. The LHS model is a complex counterpart of the Lohe sphere(LS) aggregation model on the unit sphere in Euclidean space, and it describes the aggregation of particles on the unit hermitian sphere in $\mathbb{C}^d$ with $d \geq 2$, Recently it has been introduced by two authors of this work as a special case of the Lohe tensor model [23]. When the coupling gain pair satisfies a specific linear relation, namely the Stuart-Landau(SL) coupling gain pair, it can be embedded into the LS model on $\mathbb{R}^{2d}$. In this work, we show that if the coupling gain pair is close to the SL coupling pair case, the dynamics of the LHS model exhibits an emergent aggregate phenomenon via the interplay between time-delayed interactions and nonlinear coupling between states. For this, we present several frameworks for complete aggregation and practical aggregation in terms of initial data and system parameters using the Lyapunov functional approach.