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 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 …

This review describes the field of Bose polarons, arising when mobile impurities are
immersed into a bosonic quantum gas. The latter can be realized by a Bose-Einstein …

Recently, two independent experiments reported the observation of long-lived polarons in a
Bose-Einstein condensate, providing an excellent setting to study the generic scenario of a …

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

Since the Efimov effect was introduced, a detailed theoretical understanding of Efimov
physics has been developed in the few-body context. However, it has proven challenging to …

We investigate the problem of an infinitely heavy impurity interacting with a dilute Bose gas
at zero temperature. When the impurity-boson interactions are short-ranged, we show that …

We investigate a Bose-Einstein condensate in strong interaction with a single impurity
particle. While this situation has received considerable interest in recent years, the regime of …

We introduce a novel minimally disturbing method for sub-nK thermometry in a Bose-
Einstein condensate (BEC). Our technique is based on the Bose polaron model; namely, an …

We investigate the long-range behavior of the induced Casimir interaction between two
spinless heavy impurities, or polarons, in superfluid cold atomic gases. With the help of …