Dark energy from vacuum entanglement

TL;DR

This paper proposes that dark energy originates from vacuum entanglement energy related to the universe's entanglement entropy, explaining observed properties without new physics and aligning with current data.

Contribution

It introduces a novel explanation for dark energy based on vacuum entanglement energy, matching observational constraints without modifying gravity or introducing exotic matter.

Findings

Equation of state parameter $\omega^0_\Lambda \\simeq -0.93$

Holographic dark energy parameter $d \\simeq 0.95$

Consistent with observational data at 95% confidence level

Abstract

We suggest that vacuum entanglement energy associated with the entanglement entropy of the universe is the origin of dark energy. The observed properties of dark energy can be explained by using the nature of entanglement energy without modification of gravity or exotic matter. From the number of degrees of freedom in the standard model, we obtain the equation of state parameter $\omega^0_\Lambda\simeq -0.93$ and $d\simeq 0.95$ for the holographic dark energy, which are consistent with current observational data at the 95% confidence level.