We report direct, time-resolved observations of single-photon superradiance in a highly
extended, elliptical sample of cold Rb 87 atoms. The observed rapid decay rate is …

We investigate collective emission from coherently driven ultracold 88Sr atoms. We perform
two sets of experiments using a strong and weak transition that are insensitive and sensitive …

We study the emergence of collective scattering in the presence of dipole-dipole interactions
when we illuminate a cold cloud of rubidium atoms with a near-resonant and weak intensity …

We show that two-time, second-order correlations of scattered photons from planar arrays
and chains of atoms display nonclassical features that can be described by a superatom …

We study the emergence of a collective optical response of a cold and dense Rb 87 atomic
cloud to a near-resonant low-intensity light when the atom number is gradually increased …

We show that the resonance shifts in the fluorescence of a cold gas of rubidium atoms
substantially differ from those of thermal atomic ensembles that obey the standard …

The optical properties of randomly positioned, resonant scatterers is a fundamentally difficult
problem to address across a wide range of densities and geometries. We investigate it …

We discover a transition from extended to localized quasimodes for light in a gas of
immobile two-level atoms in a magnetic field. The transition takes place either upon …

We theoretically study the propagation of light through a cold atomic medium, where the
effects of motion, laser intensity, atomic density, and polarization can all modify the …

We experimentally and numerically study the temporal dynamics of light scattered by large
clouds of cold atoms after the exciting laser is switched off, in the low intensity (linear-optics) …