Polaron quasiparticles are formed when a mobile impurity is coupled to the elementary
excitations of a many-particle background. In the field of ultracold atoms, the study of the …

The foundation of atomic physics is the arsenal of spectroscopic tools to probe individual
atoms and molecules with astounding precision. With the advent of ultracold quantum …

The notion of quasi-particles is essential for understanding the behaviour of complex many-
body systems. A prototypical example of a quasi-particle is a polaron, formed by an impurity …

The interplay of quantum statistics and interactions in atomic Bose–Fermi mixtures leads to a
phase diagram markedly different from pure fermionic or bosonic systems. However …

Recent experimental breakthroughs in non-Hermitian ultracold atomic lattices have dangled
tantalizing prospects in realizing exotic, hitherto unreported, many-body non-Hermitian …

We investigate the system of a heavy impurity embedded in a paired two-component Fermi
gas at the crossover from a Bose-Einstein condensate (BEC) to a Bardeen-Cooper …

We investigate the metastable repulsive branch of a mobile impurity coupled to a
degenerate Fermi gas via short-range interactions. We show that the quasiparticle lifetime of …

We study theoretically the lifetimes of attractive and repulsive Fermi polarons, as well as the
molecule at finite momentum in three dimensions. To this end, we develop a technique that …

We present a systematic study of a mobile impurity immersed in a three-dimensional Fermi
sea of fermions at finite temperature, by using the standard non-self-consistent many-body T …

We present the Ramsey response and radio-frequency spectroscopy of a heavy impurity
immersed in an interacting Fermi superfluid, using the exact functional determinant …