We review the status of cooling techniques aimed at achieving the deepest quantum
degeneracy for atomic Fermi gases. We first discuss some physics motivations, providing a …

We report on the creation of an ultracold dipolar gas of fermionic Na 23 K 40 molecules in
their absolute rovibrational and hyperfine ground state. Starting from weakly bound …

We realize a quantum-gas microscope for fermionic K 40 atoms trapped in an optical lattice,
which allows one to probe strongly correlated fermions at the single-atom level. We combine …

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 …

Resonances in ultracold collisions involving heavy molecules are difficult to simulate
theoretically and have proven challenging to detect. Here we report the observation of …

We study the properties of the Bose polaron, an impurity strongly interacting with a Bose-
Einstein condensate, using a field-theoretic approach and make predictions for the spectral …

Understanding collisions between ultracold molecules is crucial for making stable molecular
quantum gases and harnessing their rich internal degrees of freedom for quantum …

Mobile impurities in a Bose-Einstein condensate form quasiparticles called polarons. Here,
we show that two such polarons can bind to form a bound bipolaron state. Its emergence is …

We report on the formation of ultracold weakly bound Feshbach molecules of Na 23 K 40,
the first fermionic molecule that is chemically stable in its absolute ground state. The lifetime …