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 …

Cold atomic gases have become a paradigmatic system for exploring fundamental physics,
which at the same time allows for applications in quantum technologies. The accelerating …

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 emergence of quasiparticles in interacting matter represents one of the cornerstones of
modern physics. However, in the vicinity of a quantum critical point, the existence of …

Quantum light sources in solid-state systems are of major interest as a basic ingredient for
integrated quantum photonic technologies. The ability to tailor quantum emitters via site …

Strong Coulomb interaction in atomically thin transition metal dichalcogenides makes these
systems particularly promising for studies of excitonic physics. Of special interest are the …

We study the thermal evolution of a highly spin-imbalanced, homogeneous Fermi gas with
unitarity limited interactions, from a Fermi liquid of polarons at low temperatures to a …

Advancing our understanding of non-equilibrium phenomena in quantum many-body
systems remains one of the greatest challenges in physics. Here we report on the …

Understanding the behavior of an impurity strongly interacting with a Fermi sea is a long-
standing challenge in many-body physics. When the interactions are short ranged, two …

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 …