Impurities immersed into a surrounding ultra-cold Bose gas experience interactions
mediated by the surrounding many-body environment. If one focuses on two impurities that …

Important properties of complex quantum many-body systems and their phase diagrams can
often already be inferred from the impurity limit. The Bose polaron problem describing an …

A hyperbolic singularity in the wave function of s-wave interacting atoms is the root problem
for any accurate numerical simulation. Here, we apply the transcorrelated method, whereby …

A multiple scattering model of a quantum particle interacting with a random Lorentz gas of
fixed point scatterers is established in an Euclidean space of arbitrary dimension. At the core …

We study a linear rotor in a bosonic bath within the angulon formalism. Our focus is on
systems where isotropic or anisotropic impurity-boson interactions support a shallow bound …

The confinement-induced resonances for trapped bosons in the cigar-shaped and pancake
geometries are studied within the generalized Gross-Pitaevskii equations, which are a …

We investigate self-localization of a polaron in a homogeneous Bose-Einstein condensate in
one dimension. This effect, where an impurity is trapped by the deformation that it causes in …

Universality of the long-distance behavior across the Bardeen–Cooper–Schrieffer (BEC)-
Bose–Einstein condensate (BCS) smooth transition for two-body density correlation …

The system of two interacting bosons in a two-dimensional harmonic trap is compared with
the system consisting of two noninteracting fermions in the same potential. In particular, we …

We derive and analyze the coupled equations of quadratic approximation of the Bogoliubov
model for a weakly interacting Bose gas. The first equation determines the condensate …