In this report we discuss the dynamical response of heavy quantum impurities immersed in a
Fermi gas at zero and at finite temperature. Studying both the frequency and the time …

Polaron quasiparticles are formed when a mobile impurity is coupled to the elementary
excitations of a many-particle background. In the field of ultracold atoms, the study of the …

We employ radio-frequency spectroscopy to investigate a polarized spin mixture of ultracold
Li 6 atoms close to a broad Feshbach scattering resonance. Focusing on the regime of …

We investigate the system of a heavy impurity embedded in a paired two-component Fermi
gas at the crossover from a Bose-Einstein condensate (BEC) to a Bardeen-Cooper …

We investigate the metastable repulsive branch of a mobile impurity coupled to a
degenerate Fermi gas via short-range interactions. We show that the quasiparticle lifetime of …

We formulate the problem of numerical analytic continuation in a way that lets us draw
meaningful conclusions about the properties of the spectral function based solely on the …

We develop a general theory of Fermi polarons at nonzero temperature, including particle-
hole excitations of the Fermi sea shakeup to arbitrarily high orders. The exact set of …

We present a systematic study of a mobile impurity immersed in a three-dimensional Fermi
sea of fermions at finite temperature, by using the standard non-self-consistent many-body T …

We theoretically investigate how quasiparticle properties of an attractive Fermi polaron are
affected by nonzero temperature and finite impurity concentration in three dimensions and in …

We present the Ramsey response and radio-frequency spectroscopy of a heavy impurity
immersed in an interacting Fermi superfluid, using the exact functional determinant …