Quantum cooperativity is evident in light-matter platforms where quantum-emitter ensembles
are interfaced with confined optical modes and are coupled via the ubiquitous …

Today's narrowest linewidth lasers are limited by mirror motion in the reference optical
resonator used to stabilize the laser's frequency. Recent proposals suggest that …

Exposing a many-body system to external drives and losses can transform the nature of its
phases and opens perspectives for engineering new properties of matter. How such …

We consider various approaches to the creation of a high-stability active optical frequency
standard, where the atomic ensemble itself produces a highly stable and accurate frequency …

Superradiant lasers may soon achieve state-of-the-art frequency purity, with linewidths of 1
mHz or less. In a superradiant (or bad-cavity) laser, coherence is primarily stored in the …

We investigate theoretically the collective radiance characteristics of an atomic ensemble
with the simultaneous decay of two atoms. We show that the two-atom decay can …

We introduce multiplexed atom-cavity quantum electrodynamics with an atomic ensemble
coupled to a single optical cavity mode. Multiple Raman dressing beams establish cavity …

We investigate the different photon emission regimes created by a pre-excited and
collimated atomic beam passing through a single mode of an optical cavity. In the regime …

We study, theoretically and experimentally, electromagnetically induced transparency (EIT)
in two different solid-state systems. Unlike many implementations in homogeneously …

A suitable scheme to continuously create inversion on an optical clock transition with
negligible perturbation is a key missing ingredient required to build an active optical atomic …