Open quantum systems (OQSs) cannot always be described with the Markov approximation,
which requires a large separation of system and environment time scales. An overview is …

We review basic quantum electrodynamics and quantum optics aspects in microstructures
that exhibit a gap in the spectrum of the electromagnetic radiation they support, known as …

This paper deals with non-Markovian behavior in atomic systems coupled to a structured
reservoir of quantum electromagnetic field modes, with particular relevance to atoms …

In the first part of this introductory review we outline the developments in photonic band gap
materials from the physics of photonic band gap formation to the fabrication and potential …

We study the spontaneous emission, absorption, and dispersion properties of a Λ-type atom
where one transition interacts near resonantly with a double-band photonic crystal …

For a system consisting of a quantum emitter coupled near threshold (band edge) to a one-
dimensional continuum with a van Hove singularity in the density of states, we demonstrate …

The radiation dynamics of a dipole antenna embedded in a photonic crystal are modeled by
an initially excited harmonic oscillator coupled to a non-Markovian bath of harmonic …

The dynamics of a three-level atom in a cascade (or ladder) configuration with both
transitions coupled to a single structured reservoir of quantized electromagnetic field modes …

We study spontaneous emission in an atomic ladder system, with both transitions coupled
near resonantly to the edge of a photonic band gap continuum. The problem is solved …

We review some recent work on the occurrence of coalescing eigenstates at exceptional
points in non-Hermitian systems and their influence on physical quantities. We particularly …