Can an Axion be the Dark Energy particle ?

TL;DR

This paper proposes that an axion with a specific low energy could be the particle responsible for dark energy, supported by theoretical calculations matching observational density data.

Contribution

It introduces a novel candidate for dark energy, an axion with a particular mass, and links its quantum properties to cosmological observations.

Findings

Axion mass of approximately 1.5×10^{-3} eV/c^2 as a dark energy candidate

Derived axion's characteristic length and frequency from quantum considerations

Theoretical axion energy density aligns with observed dark energy density

Abstract

Following a phenomenological analysis done by the late Martin Perl for the detection of the dark energy, we show that an axion of energy $1.5\times 10^{-3}~eV/c^2$ can be a viable candidate for the dark energy particle. In particular, we obtain the characteristic length and frequency of the axion as a quantum particle. Then, employing a relation that connects the energy density with the frequency of a particle, i.e., $\rho\sim f^{4}$, we show that the energy density of axions, with the aforesaid value of mass, as obtained from our theoretical analysis is proportional to the dark energy density computed on observational data, i.e., $\rho_{a}/\rho_{DE}\sim \mathcal{O}(1)$.