A bimetric cosmological model based on Andrei Sakharov's twin universe approach

TL;DR

This paper proposes a bimetric cosmological model inspired by Sakharov's twin universe concept, aiming to explain large-scale structure, cosmic acceleration, and matter-antimatter asymmetry.

Contribution

It introduces a novel bimetric framework that incorporates Sakharov's twin universe idea to address key cosmological challenges.

Findings

Provides an alternative interpretation of cosmic voids.

Offers a new explanation for the universe's accelerated expansion.

Addresses matter-antimatter asymmetry through twin universe interactions.

Abstract

The standard cosmological model, based on Cold Dark Matter and Dark Energy ({\Lambda}CDM), faces several challenges. Among these is the need to adjust the scenario to account for he presence of vast voids in the large-scale structure of the universe, as well as the early formation of the first stars and galaxies. Additionally, the observed matter-antimatter asymmetry in the universe remains an unresolved issue. To address this latter question, Andrei Sakharov proposed a twin universe model in 1967. Building upon this idea and introducing interactions between these two universe sheets through a bimetric model, we propose an alternative interpretation of the large-scale structure of the universe, including its voids and the acceleration of cosmic expansion.