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 …

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 …

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 …

The nature of strongly interacting Fermi gases and magnetism is one of the most important
and studied topics in condensed-matter physics. Still, there are many open questions. A …

We present highly accurate energy spectra and eigenfunctions of small 1D harmonically
trapped two-component Fermi gases with interspecies δ-function interactions, and analyze …

We study spin-1/2 fermions, interacting via a two-body contact potential, in a one-
dimensional harmonic trap. Applying exact diagonalization, we investigate their behavior at …

A system of two species of fermions of different mass confined in a one-dimensional
harmonic trap is studied with an exact diagonalization approach. It is shown that a mass …

We unravel the dynamical stability of a fully polarized one-dimensional ultracold few-fermion
spin-1/2 gas subjected to inhomogeneous driving of the itinerant spins. Despite the unstable …

Exact diagonalization expansions of Bose or Fermi gases with contact interactions converge
very slowly due to a nonanalytic cusp in the wave function. Here we develop a …

Cold atomic gases have provided us with a great number of opportunities for studying
various physical systems under controlled conditions that are seldom offered in other fields …