Emergent vortex-electron interaction from dualization

TL;DR

This paper explores a dual formulation of the Abelian Higgs model with vortex lines and fermions, revealing a topological interaction that affects gauge field masses and induces a Coulomb potential with a large dielectric constant.

Contribution

It introduces a dual antisymmetric tensor gauge field framework and calculates one-loop fermion effects, uncovering a topological $B  F$ interaction and modified gauge dynamics.

Findings

Induction of a topological $B  F$ term in the effective action.

Increase in photon and tensor gauge field masses due to fermion loops.

Emergence of a Coulomb potential with a large dielectric constant.

Abstract

We consider the Abelian Higgs model in 3+1 dimensions with vortex lines, into which charged fermions are introduced. This could be viewed as a model of a type-II superconductor with unpaired electrons (or holes), analogous to the boson-fermion model of high-$T_c$ superconductors but one in which the bosons and fermions interact only through the electromagnetic gauge field. We investigate the dual formulation of this model, which is in terms of a massive antisymmetric tensor gauge field $B_{\mu\nu}$ mediating the interaction of the vortex lines. This field couples to the fermions through a nonlocal spin-gauge interaction term. We then calculate the quantum correction due to the fermions at one loop and show that due to the presence of this new nonlocal term a topological $B \wedge F$ interaction is induced in the effective action, leading to an increase in the mass of both the photon and the tensor gauge field. Additionally, we find a Coulomb potential between the electrons, but with a large dielectric constant generated by the one-loop effects.