Steady-state superradiance with alkaline earth atoms

TL;DR

This paper demonstrates the possibility of achieving steady-state superradiance using earth-alkaline-like atoms with ultra-narrow transitions, opening new avenues in cavity quantum electrodynamics research.

Contribution

It introduces a new regime of cavity QED with ultra-narrow transition atoms enabling steady-state superradiance, which was not previously demonstrated.

Findings

Steady-state superradiance is achievable with earth-alkaline-like atoms.

Ultra-narrow transitions allow for a critical photon number much lower than conventional systems.

Key experimental conditions for realizing this regime are discussed.

Abstract

Earth-alkaline-like atoms with ultra-narrow transitions open the door to a new regime of cavity quantum electrodynamics. That regime is characterized by a critical photon number that is many orders of magnitude smaller than what can be achieved in conventional systems. We show that it is possible to achieve superradiance in steady state with such systems. We discuss the basic underlying mechanisms as well as the key experimental requirements