In this review, we discuss the properties of a few impurity atoms immersed in a gas of
ultracold fermions—the so-called Fermi polaron problem. On one hand, this many-body …

In this report we discuss the dynamical response of heavy quantum impurities immersed in a
Fermi gas at zero and at finite temperature. Studying both the frequency and the time …

Knowing when a physical system has reached sufficient size for its macroscopic properties
to be well described by many-body theory is difficult. We investigated the crossover from few …

Recent theoretical and experimental progress on studying one-dimensional systems of
bosonic, fermionic, and Bose–Fermi mixtures of a few ultracold atoms confined in traps is …

Bose polarons, quasiparticles composed of mobile impurities surrounded by cold Bose gas,
can experience strong interactions mediated by the many-body environment and form …

In one dimension, the study of magnetism dates back to the dawn of quantum mechanics
when Bethe solved the famous Heisenberg model that describes quantum behaviour in …

The presence of strong interactions in a many-body quantum system can lead to a variety of
exotic effects. Here we show that even in a comparatively simple setup consisting of a …

We investigate a temporal evolution of an impurity atom in a one-dimensional trapped Bose
gas following a sudden change of the boson-impurity interaction strength. Our focus is on …

A major challenge in modern physics is to accurately describe strongly interacting quantum
many-body systems. One-dimensional systems provide fundamental insights because they …

We present the complete phase diagram for one-dimensional binary mixtures of bosonic
ultracold atomic gases in a harmonic trap. We obtain exact results with direct numerical …