Casimir force for cosmological domain walls

TL;DR

This paper investigates how quantum vacuum fluctuations and explicit symmetry violations in scalar field interactions can generate a bias that potentially resolves the cosmological domain wall problem.

Contribution

It introduces a mechanism where quantum effects induce a bias in classically stable domain walls, addressing their cosmological stability issues.

Findings

Quantum vacuum fluctuations can influence domain wall evolution.

Explicit symmetry violation induces a quantum bias.

The mechanism may solve the cosmological domain wall problem.

Abstract

We calculate the vacuum fluctuations that may affect the evolution of cosmological domain walls. Considering domain walls, which are classically stable and have interaction with a scalar field, we show that explicit symmetry violation in the interaction may cause quantum bias that can solve the cosmological domain wall problem.