The fundamental coherent radiation emission processes from a bunched charged particles
beam are outlined. In contrast to spontaneous emission of radiation from a random electron …

Topology and symmetry have emerged as compelling guiding principles to predict and
harness the propagation of waves in natural and artificial materials. Be it for quantum …

We explore the unconventional wave scattering properties of non-Hermitian systems in
which amplification or damping are induced by time-periodic modulation. These non …

Measured and calculated results are presented for the emission properties of a new class of
emitters operating in the cavity quantum electrodynamics regime. The structures are based …

Collective coupling between dipoles can dramatically modify the optical response of a
medium. Such effects depend strongly on the geometry of the medium and the polarization …

The science of x-rays is by now over 125years old, starting with Wilhelm Röntgen's
discovery of x-rays in 1895, for which Röntgen was awarded the first Nobel Prize in Physics …

We study the nonreciprocal excitation and entanglement dynamics of two giant atoms (GAs)
coupling to a one-dimensional waveguide. With different positions of coupling points, three …

Due to the recent groundbreaking developments of nanotechnologies, it became possible to
create intrinsically quantum systems able to serve as high‐directional antennas in terahertz …

We present the general theory of a quantum heat machine based on an N-level system
(working medium) whose N− 1 excited levels are degenerate, a prerequisite for steady-state …

The collective behavior of ensembles of atoms has been studied in-depth since the seminal
paper of Dicke [Phys. Rev. 93, 99 (1954) PHRVAO0031-899X10. 1103/PhysRev. 93.99] …