Cooperative behavior of quantum dipole emitters coupled to a zero-index nanoscale waveguide

TL;DR

This paper explores how quantum dipole emitters interact cooperatively when coupled to a zero-index nanoscale waveguide, revealing enhanced entanglement and superradiance over larger distances due to the waveguide's unique properties.

Contribution

It demonstrates that zero-index waveguides facilitate easier observation of entanglement and superradiance among quantum emitters by relaxing positioning constraints.

Findings

Coupling to zero-index waveguides enhances entanglement generation.

Superradiance can be observed over extended spatial scales.

Positioning constraints for emitters are significantly relaxed.

Abstract

We study cooperative behavior of quantum dipole emitters coupled to a rectangular waveguide with dielectric core and silver cladding. We investigate cooperative emission and inter-emitter entanglement generation phenomena for emitters whose resonant frequencies are near the frequency cutoff of the waveguide, where the waveguide effectively behaves as zero-index metamaterial. We show that coupling emitters to a zero-index waveguide allows one to relax the constraint on precision positioning of emitters for observing inter-emitter entanglement generation and extend the spatial scale at which the superradiance can be observed.