Stable Monopole-Antimonopole String Background in SU(2) QCD

TL;DR

This paper demonstrates that a monopole-antimonopole string pair in SU(2) QCD can form a stable magnetic background, supporting the idea that magnetic condensation leads to color confinement.

Contribution

It identifies a stable monopole-antimonopole string configuration in SU(2) QCD, providing evidence for magnetic condensation as a mechanism for confinement.

Findings

A pair of monopole and antimonopole strings is stable below a critical separation.

Stable monopole-antimonopole background supports magnetic condensation hypothesis.

Supports the role of magnetic monopoles in color confinement.

Abstract

Motivated by the instability of the Savvidy-Nielsen-Olesen vacuum we make a systematic search for a stable magnetic background in pure SU(2) QCD. It is shown that a pair of axially symmetric monopole and antimonopole strings is stable, provided that the distance between the two strings is less than a critical value. The existence of a stable monopole-antimonopole string background strongly supports that a magnetic condensation of monopole-antimonopole pairs can generate a dynamical symmetry breaking, and thus the magnetic confinement of color in QCD.