Baryon asymmetry resulting from a quantum phase transition in the early universe

TL;DR

This paper proposes a new mechanism for the universe's matter-antimatter asymmetry, based on a quantum phase transition during cosmic cooling, without requiring baryon number violation or CP violation.

Contribution

It introduces a novel cosmological model linking quantum phase transitions to baryon asymmetry, inspired by condensed matter physics experiments.

Findings

The universe's matter-antimatter asymmetry can arise from a quantum phase transition.

The mechanism does not rely on microscopic baryon number violation or CP violation.

Experimental condensed matter results support the proposed cosmological process.

Abstract

A novel mechanism for explaining the matter-antimatter asymmetry of the universe is considered. We assume that the universe starts from completely symmetric state and then, as it cools down, it undergoes a quantum-phase transition which in turn causes an asymmetry between matter and anti-matter. The mechanism does not require the baryon number violating interactions or CP violation at a microscopic level. Our analysis of the matter-antimatter asymmetry is in the context of conspicuous experimental results obtained in the condensed-matter physics.