This report on progress explores recent advances in our theoretical and experimental
understanding of the physics of open quantum systems (OQSs). The study of such systems …

Quantum optics with X-rays has long been a somewhat exotic activity, but it is now rapidly
becoming relevant as precision x-ray optics and novel X-ray light sources, and high-intensity …

We study the impact of cooperative many-body effects on the operation of periodically-driven
quantum thermal machines, particularly heat engines and refrigerators. In suitable …

We study generic features of open quantum systems embedded into a continuum of
scattering wavefunctions and compare them with results discussed in optics. A dynamical …

We consider collective spontaneous emission from an ensemble of N identical two-level
atoms prepared by absorption of a single photon–aka single photon Dicke superradiance …

High-fidelity quantum gate operations are essential for achieving scalable quantum circuits.
In spin qubit quantum computing systems, metallic gates and antennas that are necessary …

Nuclear γ-ray-resonant superradiance is discussed, comparing Dicke's original approach
and recent extensions, of Scully et al. involving conditional excitation to the classical …

Concentration quenching is a well-known challenge in many fluorescence imaging
applications. Here, we show that the optical emission from hundreds of chromophores …

In this paper we study the full quantum approach to the interaction of N trapped two-level
ions with N quantized fields in such a way that each of the trapped ions separately interacts …

Nuclear resonant γ-ray absorption has important practical applications through Mössbauer
spectroscopy. At synchrotron-radiation facilities, it is most often used in the time domain, ie …