Using state-selective field ionization, the state distributions of Rydberg atoms in cold
Rydberg gases are measured for various initially excited Rydberg levels, populations, and …

Cold, dense Rydberg gases produced in a cold-atom trap are investigated using
spectroscopic methods and time-resolved electron counting. Optical excitation on the …

Rydberg-Rydberg collisions in a cold, dense Rydberg gas can lead to the conversion of
internal energy into center-of-mass energy of the colliding atoms, resulting in Rydberg-atom …

We report the creation of an interacting cold Rydberg gas of strontium atoms. We show that
the excitation spectrum of the inner valence electron is sensitive to the interactions in the …

Dense samples of cold Rydberg atoms have previously been observed to spontaneously
evolve to a plasma, despite the fact that each atom may be bound by as much as 100 cm− 1 …

We employ ensembles of cold Rydberg-atom gases produced via photo-excitation of laser-
cooled atom clouds in order to investigate collision-induced dynamics, excitation blockades …

Recent developments in the study of ultracold Rydberg gases demand an advanced level of
experimental sophistication, in which high atomic and optical densities must be combined …

In a recent work [Phys. Rev. Lett. 98, 023004 (2007)], we investigated the influence of the
attractive van der Waals interaction on the pair distribution and Penning ionization dynamics …

We investigate a possible mechanism for the autoionization of ultracold Rydberg gases,
based on the resonant coupling of Rydberg pair states to the ionization continuum. Unlike …

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 …