We review Rydberg aggregates, assemblies of a few Rydberg atoms exhibiting energy
transport through collective eigenstates, considering isolated atoms or assemblies …

We show that an array of ultracold Rydberg atoms embedded in a laser driven background
gas can serve as an aggregate for simulating exciton dynamics and energy transport with a …

We often infer the state of systems in nature indirectly, for example, in high-energy physics
by the interaction of particles with an ambient medium. We adapt this principle to energies 9 …

Cold Rydberg atoms provide novel approaches to many-body problems and quantum
simulation. To introduce the recent work presented in this special issue, we present here a …

In this chapter, we present a review of Rydberg atom interactions. The review focusses on
the importance of these interactions in ultracold Rydberg atom physics. We address how …

We show that the dipole-dipole interaction between two Rydberg atoms can give rise to long-
range molecules. The binding potential arises from two states that converge to different …

We show that the dipole-dipole interaction between three identical Rydberg atoms can give
rise to bound trimer states. The microscopic origin of these states is fundamentally different …

Power broadening—the broadening of the spectral line profile of a two-state quantum
transition as the amplitude of the driving field increases—is a well-known and thoroughly …

We consider Penning ionization of Rydberg atom pairs as an Auger-type process induced
by the dipole–dipole interaction and employ semiclassical formulae for dipole transitions to …

Assemblies of Rydberg atoms subject to resonant dipole-dipole interactions exhibit Frenkel
excitons. We show that van der Waals shifts can significantly modify the exciton wave …