Scalar Field Dark Matter Quantum Effects as Dark Energy

TL;DR

This paper suggests that quantum effects of ultra-light scalar field dark matter can produce a constant energy density comparable to the cosmological constant, potentially explaining dark energy.

Contribution

It demonstrates that quantum effects of ultra-light scalar field dark matter can account for dark energy at cosmological scales.

Findings

Quantum effects are significant at classical scales for ultra-light dark matter.

The effective density from quantum effects matches the order of the universe's critical density.

Quantum effects can be interpreted as a cosmological constant.

Abstract

Using very simple arguments we show that the quantum effects of an ultra-light particle as the Scalar Field Dark Matter $m_{SFDM}\sim10^{-22}$eV cannot be neglected at classical scales. We show that the effective density of this effect is constant in the space and for such a mass, it is of the order of magnitude of the critical mass of the universe. Thus, we can interpret the effective density of this quantum effect as the cosmological constant.