Ultrastrong coupling between light and matter has, in the past decade, transitioned from a
theoretical idea to an experimental reality. It is a new regime of quantum light–matter …

Recent experiments have demonstrated that light and matter can mix together to an extreme
degree, and previously uncharted regimes of light-matter interactions are currently being …

Quantum information theorems state that it is possible to exploit collective quantum
resources to greatly enhance the charging power of quantum batteries (QBs) made of many …

The light-matter interaction can be utilized to qualitatively alter physical properties of
materials. Recent theoretical and experimental studies have explored this possibility of …

Nonlinear optical processes, such as harmonic generation, are of great interest for various
applications, eg, microscopy, therapy, and frequency conversion. However, high-order …

Improvements in both the photonic confinement and the emitter design have led to a steady
increase in the strength of the light-matter coupling in cavity quantum electrodynamics …

Quantum light-matter systems at strong coupling are notoriously challenging to analyze due
to the need to include states with many excitations in every coupled mode. We propose a …

A two-level system resonantly interacting with an ac magnetic or electric field constitutes the
physical basis of diverse phenomena and technologies. However, Schrödinger's equation …

Recent advances in optical studies of condensed matter systems have led to the emergence
of a variety of phenomena that have conventionally been studied in the realm of quantum …

In spite of decades of work it has remained unclear whether or not superradiant quantum
phases, referred to here as photon condensates, can occur in equilibrium. In this Rapid …