At the quantum many-body level, atom-light interfaces generally remain challenging to solve
for or understand in a nonperturbative fashion. Here we consider a waveguide quantum …

It is interesting to observe that all optical materials with a positive refractive index have a
value of index that is of order unity. Surprisingly, though, a deep understanding of the …

Atoms subject to weak coherent incident light can be treated as coupled classical linear
oscillators, supporting subradiant and superradiant collective excitation eigenmodes. We …

The scattering of charged particles by N atoms is investigated theoretically. We derive the
scattering equations by applying the approach of Faddeev that was originally developed to …

Here we present a microscopic model that describes the electromagnetically induced
transparency (EIT) phenomenon in the multiple-scattering regime. We consider an …

We analyze the scattering of light from dipolar emitters whose disordered positions exhibit
correlations induced by static, long-range dipole-dipole interactions. The quantum …

In a previous paper [Phys. Rev. A 105, 042205 (2022) 10.1103/PhysRevA. 105.042205], the
distribution of resonance poles in the complex plane of the wave number k associated to the …

Manifestations of dipole–dipole interactions in dilute thermal gases are difficult to sense
because of strong inhomogeneous broadening. Recent experiments reported signatures of …

Mirrorless lasing has been a topic of particular interest for about a decade due to promising
new horizons for quantum science and applications. In this work, we review first-principles …

This thesis presents a brief compilation of the works developed during my doctorate, and
can be divided basically into three main parts. In the first one, we show the changes caused …