Universal Acceleration and Fuzzy Dark Matter

TL;DR

This paper explores how quantum effects in fuzzy dark matter could explain a universal acceleration scale observed in galaxies and proposes a potential link to dark energy, offering a novel perspective on cosmic acceleration.

Contribution

It demonstrates that quantum effects in fuzzy dark matter can naturally produce the observed universal acceleration scale and suggests a connection to dark energy.

Findings

Quantum effects in fuzzy dark matter lead to a universal acceleration scale.

The observed acceleration scale emerges from a fluid-like description of dark matter.

A possible link between the acceleration scale and dark energy is proposed.

Abstract

Observations of velocity dispersions of galactic structures over a wide range of scales point to the existence of a universal acceleration scale $a_0\sim 10^{-10}$ m/s$^2$. Focusing on the fuzzy dark matter paradigm, which proposes ultralight dark matter with mass around $10^{-22}$ eV and de Broglie wavelength $\lambda\sim {\rm few}\times10^{2}$ parsecs, we highlight the emergence of the observed acceleration scale from quantum effects in a fluid-like description of the dark matter dynamics. We then suggest the possibility of a natural connection between the acceleration scale and dark energy within the same paradigm.