How natural is a small but nonzero cosmological constant?

TL;DR

This paper proposes a refined model involving two scalar fields to explain the small but nonzero cosmological constant, highlighting a mechanism of nearly periodic mini-inflations and analyzing the likelihood of such solutions based on parameter choices.

Contribution

It introduces an improved approach to understanding the cosmological constant through a two-scalar-field model with nearly periodic mini-inflations, building on previous work.

Findings

Mini-inflations occur nearly periodically with respect to ln t

The likelihood of solutions depends on parameter choices

The model offers a new perspective on the small cosmological constant

Abstract

Based on our previous attempt, we propose a better way to understand a small but nonzero cosmological constant, as indicated by a number of recent observational studies. We re-examine the assumptions of our model of two scalar fields, trying to explain the basic mechanism resulting in a series of mini-inflations occuring nearly periodically with respect to $\ln t$ with $t$ the cosmic time. We also discuss how likely the solution of this type would be, depending on the choice of the parameters.