A microscopic model for an emergent cosmological constant

TL;DR

This paper proposes a microscopic model where the cosmological constant emerges from energy diffusion at quantum gravity scales, offering a new perspective on its origin and potential insights into quantum gravity physics.

Contribution

It introduces a phenomenological model linking the cosmological constant to energy diffusion from particle physics to quantum gravity granularity, a novel approach in the field.

Findings

Model successfully explains the observed value of the cosmological constant

Provides quantitative insights into energy transfer at quantum gravity scales

Encourages further exploration of quantum gravity phenomenology

Abstract

The value of the cosmological constant is explained in terms of a noisy diffusion of energy from the low energy particle physics degrees of freedom to the fundamental Planckian granularity which is expected from general arguments in quantum gravity. The quantitative success of our phenomenological model is encouraging and provides possibly useful insights about physics at the scale of quantum gravity.