Enhancing the optical cross section is an enticing goal in light-matter interactions, due to its
fundamental role in quantum and nonlinear optics. Here, we show how dipolar interactions …

Superradiance has been extensively studied in the 1970s and 1980s in the regime of
superfluorescence, where a large number of atoms are initially excited. Cooperative …

Phase transitions are ubiquitous in our three-dimensional world. By contrast, most
conventional transitions do not occur in infinite uniform low-dimensional systems because of …

We create supercurrents in annular two-dimensional Bose gases through a temperature
quench of the normal-to-superfluid phase transition. We detect the magnitude and the …

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 …

Cooperative scattering has been the subject of intense research in the last years. In this
article, we discuss the concept of cooperative scattering from a broad perspective. We briefly …

Ultracold atomic systems are among the most promising platforms that have the potential to
shed light on the complex behavior of many-body quantum systems. One prominent …

The role of reduced dimensionality in high-temperature superconductors is still under
debate. Recently, ultracold atoms have emerged as an ideal model system to study such …