3 papers
cond-mat.supr-con2025
Dispersion of plasmons in three-dimensional superconductors
T. Repplinger, S. Klimin, M. Gélédan +2
We study the plasma branch of an homogeneous three-dimensional electron gas in an -wave superconducting state. We focus on the regime where the plasma frequency is compar…
cond-mat.quant-gas2025
Dispersion of first sound in a weakly interacting ultracold Fermi liquid
Thomas Repplinger, Songtao Huang, Yunpeng Ji +2
At low temperature, a normal gas of unpaired spin-1/2 fermions is one of the cleanest realizations of a Fermi liquid. It is described by Landau's theory, where no phenomenological…
cond-mat.quant-gas2024
Emergence of Sound in a Tunable Fermi Fluid
Songtao Huang, Yunpeng Ji, Thomas Repplinger +6
Landau's Fermi-liquid (FL) theory has been successful at the phenomenological description of the normal phase of many different Fermi systems. Using a dilute atomic Fermi fluid wit…