Flux tubes and coherence length in the SU(3) vacuum

TL;DR

This paper estimates the London penetration and coherence lengths in the SU(3) vacuum by analyzing chromoelectric flux tubes, modeling the vacuum as a dual superconductor, and fitting experimental data with a variational approach.

Contribution

It introduces a variational model for the SU(3) vacuum as a dual superconductor to estimate key physical lengths from flux tube profiles.

Findings

Estimated coherence and penetration lengths in SU(3) vacuum.

Fitted chromoelectric field data with a dual superconductor model.

Used smearing to reduce noise in flux tube measurements.

Abstract

An estimate of the London penetration and coherence lengths in the vacuum of the SU(3) pure gauge theory is given downstream an analysis of the transverse profile of the chromoelectric flux tubes. Within ordinary superconductivity, a simple variational model for the magnitude of the normalized order parameter of an isolated vortex produces an analytic expression for magnetic field and supercurrent density. In the picture of SU(3) vacuum as dual superconductor, this expression provides us with the function that fits the chromoelectric field data. The smearing procedure is used in order to reduce noise.