We review the quantum statistical properties of two-dimensional shell-shaped gases,
produced by cooling and confining atomic ensembles in thin hollow shells. We consider …

We analyze the divergent zero-point energy of a dilute and ultracold gas of atoms in D
spatial dimensions. For bosonic atoms we explicitly show how to regularize this divergent …

Strongly interacting two-dimensional Fermi systems are one of the great remaining
challenges in many-body physics due to the interplay of strong local correlations and …

We study quantum geometric contributions to the Berezinskii-Kosterlitz-Thouless (BKT)
transition temperature T BKT in the presence of fluctuations beyond BCS theory. Because …

We discuss standard and tighter upper bounds on the critical temperature Tc of two-
dimensional superfluids and superconductors versus particle density n or filling factor ν for …

The Berezinskii-Kosterlitz-Thouless (BKT) mechanism describes universal vortex unbinding
in many two-dimensional systems, including the paradigmatic XY model. However, most of …

We theoretically investigate superfluidity in a strongly interacting Fermi gas confined to two
dimensions at finite temperature. Using a Gaussian pair fluctuation theory in the superfluid …

Using Landau's theory of two-fluid hydrodynamics, we investigate first and second sounds
propagating in a two-dimensional (2D) Bose gas. We study the temperature and interaction …

We briefly review the research on second sound in ultracold atomic physics, with emphasis
on strongly interacting unitary Fermi gases with infinitely large s-wave scattering length …

We theoretically study the superfluid phase of a strongly correlated Yb 173 Fermi gas near
its orbital Feshbach resonance by developing a quantitative pair-fluctuation theory within a …