27 citations · 56 across the 10 of their papers we have counts for
4 papers · 1 filter
From spontaneous to explicit symmetry breaking in a finite-sized system: Bosonic bound states of an impurity
L. Chergui, F. Brauneis, T. Arnone Cardinale +3
The presence of a single attractive impurity in an ultracold repulsive bosonic system can drive a transition from a homogeneous to a localized state, as we here show for a one-dime…
Effective theory for strongly attractive one-dimensional fermions
Timothy G. Backert, Fabian Brauneis, Matija Čufar +3
We study a one-dimensional system of two-component fermions in the limit of strong attractive particle-particle interactions. First, we analyze scattering in the corresponding few-…
Two-dimensional bosonic droplets in a harmonic trap
Fabian Brauneis, Artem G. Volosniev, Hans-Werner Hammer
We investigate a system of bosons in a two-dimensional harmonic trap. In the limit of strong attractive interactions, the bosons make a droplet insensitive to external confinement.…
Comparison of renormalized interactions using one-dimensional few-body systems as a testbed
Fabian Brauneis, Hans-Werner Hammer, Stephanie M. Reimann +1
Even though the one-dimensional contact interaction requires no regularization, renormalization methods have been shown to improve the convergence of numerical ab initio calculatio…