Casimir Energy Density at Planck Time: Cosmic Coincidence or Double Solution to the Cosmological Dark Energy Problem?

TL;DR

This paper explores whether the Casimir energy density at the Planck time could explain the current dark energy density, potentially solving the cosmic coincidence problem.

Contribution

It proposes a novel link between early universe Casimir energy and present dark energy, suggesting a natural explanation for their observed density coincidence.

Findings

Casimir energy density at Planck time matches current critical density

The model offers a potential solution to the cosmic coincidence problem

The approach aligns with existing ideas about dark energy

Abstract

The Casimir energy density calculated for a spherical shell of radius equal to the size of the Universe projected back to the Planck time is almost equal to the present day critical density. Is it just a coincidence, or is it a solution to the `cosmic dark energy' and the `cosmic coincidence' problems? The correspondence is too close to be ignored as a coincidence, especially since this solution fits the conceptual and numerical ideas about the dark energy, and also answers why this energy is starting to dominate at the present era in the evolution of the Universe.