On some local properties of Yang-Mills vacuum

TL;DR

This paper investigates specific local properties of the Yang-Mills vacuum using a non-covariant gauge, revealing that the dominant unstable mode is inherently non-perturbative and classical in nature.

Contribution

It introduces a non-covariant gauge to make certain Yang-Mills features explicit, highlighting the non-perturbative classical origin of the vacuum's unstable mode.

Findings

Unstable mode significantly contributes to vacuum energy.

Non-covariant gauge makes some YM features explicit.

Unstable mode is non-perturbative and classical.

Abstract

In this paper we use a non-covariant gauge which makes some of the YM features manifest which otherwise do not appear explicitly in the Landau gauge used by Nielsen and Olesen.We show, in fact, that the unstable mode which makes a large contribution to the vacuum energy is non-perturbative even classically.