Cosmic Acceleration from a Simultaneous Variation of Fundamental Constants

TL;DR

This paper proposes that simultaneous variations in fundamental constants, specifically G and m_e, could explain cosmic acceleration without dark energy, linking gravity tests, particle physics, and cosmology.

Contribution

It introduces a model where evolving fundamental constants account for cosmic acceleration, offering an alternative to dark energy.

Findings

Variation in m_e consistent with quasar spectra bounds

Cosmic acceleration explained without cosmological constant

Links fundamental physics with cosmological observations

Abstract

We discuss the possibility of a simultaneous cosmic variation of two fundamental entities: the Newtonian gravitational coupling $G$ and the electron mass $m_e$. We show that this variation can account for the late-time cosmic acceleration without invoking a cosmological constant or an explicit dark-energy fluid. We compare the derived $m_e$ variation with laboratory bounds found from Quasar absorption Spectra. Our results indicate that late-time cosmic acceleration could be a manifestation of evolving fundamental couplings, establishing a direct bridge between precision tests of gravity, particle physics and the origin of cosmic acceleration.