Flux-Tube Formation and Holographic Tunneling

TL;DR

This paper explores different mechanisms of flux-tube formation between Wilson loops using holographic duality, including supergravity exchange, resonant tunneling, and dyonic string exchange, with implications for lattice gauge theory.

Contribution

It introduces a novel resonant tunneling mechanism for flux-tube formation in holographic Yang-Mills theories, expanding the understanding of Wilson loop correlators.

Findings

Resonant tunneling can significantly enhance Wilson loop correlators.

Multiple mechanisms, including supergravity exchange and dyonic strings, contribute to flux-tube formation.

Implications for lattice gauge theory measurements are discussed.

Abstract

We consider correlator of two concentric Wilson loops, a small and large ones related to the problem of flux-tube formation. There are three mechanisms which can contribute to the connected correlator and yield different dependences on the radius of the small loop. The first one is quite standard and concerns exchange by supergravity modes. We also consider a novel mechanism when the flux-tube formation is described by a barrier transition in the string language, dual to the field-theoretic formulation of Yang-Mills theories. The most interesting possibility within this approach is resonant tunneling which would enhance the correlator of the Wilson loops for particular geometries. The third possibility involves exchange by a dyonic string supplied with the string junction. We introduce also t'Hooft and composite dyonic loops as probes of the flux tube. Implications for lattice measurements are briefly discussed.