We present an experimental measurement of the cooperative Lamb shift and the Lorentz
shift using a nanothickness atomic vapor layer with tunable thickness and atomic density …

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 …

In a recent paper [Gorshkov, Phys. Rev. Lett. 98, 123601 (2007)], we presented a universal
physical picture for describing a wide range of techniques for storage and retrieval of photon …

It is interesting to observe that all optical materials with a positive refractive index have a
value of index that is of order unity. Surprisingly, though, a deep understanding of the …

At the quantum many-body level, atom-light interfaces generally remain challenging to solve
for or understand in a nonperturbative fashion. Here we consider a waveguide quantum …

Superradiance and subradiance are collective effects that emerge from coherent
interactions between quantum emitters. Due to their many-body nature, theoretical studies of …

Results from higher order mean-field calculations of light interacting with atom arrays are
presented for calculations of one-and two-time expectation values. The atoms are …

We discuss how a three-level system can be used to change the frequency-dependent
magnetic permeability of an atomic gas to be significantly different from 1. We derive the …

Experiments in dense, ultracold gases of rubidium Rydberg atoms show a considerable
decrease of the radiative excited state lifetimes compared to dilute gases. This accelerated …

We theoretically and computationally investigate the behavior of infinite atom arrays when
illuminated by nearly resonant light. We use higher-order mean-field equations to …