Since their discovery, it has been suggested that pairing in pnictides can be mediated by
spin fluctuations between hole and electron bands. In this view, multiband superconductivity …

According to the Goldstone theorem the breaking of a continuous U (1) symmetry comes
along with the existence of low-energy collective modes. In the context of superconductivity …

We study an impurity atom trapped by an anharmonic potential, immersed within a cold
atomic Fermi gas with attractive interactions that realizes the crossover from a Bardeen …

We theoretically investigate the dynamic structure factor of a strongly interacting Fermi gas at
the crossover from Bardeen–Cooper–Schrieffer superfluids to Bose–Einstein condensates …

Superconductors are often discussed in the mean-field approximation that breaks $ U (1) $
symmetry. Since the $ U (1) $ symmetry underlies the charge conservation, naive …

In this paper we show how to redress a shortcoming of the path integral scheme for
fermionic superfluids and superconductors. This approach is built around a simultaneous …

We present a theoretical study of the compressibility κ in a Fermi gas with attractive contact
interactions, providing predictions for the strongly attractive regime and the superfluid phase …

Observing the amplitude-Higgs mode in superconductors has been a central challenge in
condensed matter physics. Unlike the phase mode in the electromagnetic (EM) response …

We develop a method to extract the dissipation for a heavy moving impurity immersed in
superfluid Fermi gases, which may serve as a theoretical model to explain relevant …

We present a diagrammatic theory for determining consistent electromagnetic response
functions in strongly correlated fermionic superfluids. While a gauge-invariant …