Coherently delocalized states in dipole interacting Rydberg ensembles: the role of internal degeneracies

TL;DR

This paper explores how internal degeneracies in Rydberg atom ensembles influence exciton delocalization, demonstrating that degeneracies can enhance delocalization and that magnetic fields can control the transition between degenerate and non-degenerate regimes.

Contribution

It provides a detailed analysis of the role of internal degeneracies in exciton delocalization within Rydberg ensembles and introduces magnetic field control of degeneracy effects.

Findings

Degeneracies enhance exciton delocalization.

Magnetic fields can controllably lift degeneracies.

Transition between degenerate and non-degenerate regimes observed.

Abstract

We investigate the effect of degenerate atomic states on the exciton delocalization of dipole-dipole interacting Rydberg assemblies. Using a frozen gas and regular one-, two-, and three-dimensional lattice arrangements as examples, we see that degeneracies can enhance the delocalization compared to the situation when there is no degeneracy. Using the Zeeman splitting provided by a magnetic field, we controllably lift the degeneracy to study in detail the transition between degenerate and non-degenerate regimes.