Nonzero $\Omega_{\Lambda}$ and a new type of the dissipative structure

TL;DR

This paper explores a theoretical model with two interacting scalar fields that could explain a small nonzero cosmological constant, revealing sensitive dependence on initial conditions and suggesting a new type of dissipative structure.

Contribution

It introduces a novel scalar field interaction model that exhibits chaotic-like behavior, proposing a new dissipative structure relevant to cosmology.

Findings

Solutions depend sensitively on initial conditions

Behavior resembles chaotic systems

Suggests a new dissipative structure in cosmology

Abstract

We revisit the proposed theoretical model for a small but nonzero cosmological constant which seems supported increasingly better by recent observations. The model features two scalar fields which interact with each other through a specifically chosen nonlinear potential. We find a very sensitive dependence of the solutions of the scalar field equations on the initial values. We discuss how the behavior is similar to and different from those in well-known chaotic systems, coming to suggest an interesting new type of the dissipative structure.