8 papers
A low-energy effective Hamiltonian for Landau quasiparticles: II Application to the contact Fermi gas
Pierre-Louis Taillat, Hadrien Kurkjian
This article follows up on arxiv:2511.15938, in which we developed a new renormalization scheme to construct a quantized theory of Fermi liquids. Here, we apply this formalism to a…
The crossover from classical to quantum transport in a weakly-interacting Fermi gas
Hadrien Kurkjian
We present an exact solution of the quantum kinetic equation of a weakly interacting Fermi gas in the crossover from the degenerate Fermi-liquid regime to the classical Boltzmann g…
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…
Exact perturbative expansion of the transport coefficients of a normal low-temperature Fermi gas with contact interactions
Pierre-Louis Taillat, Hadrien Kurkjian
We compute the shear viscosity, thermal conductivity and spin diffusivity of a Fermi gas with short-range interactions in the Fermi liquid regime of the normal phase, that is at te…
A low-energy effective Hamiltonian for Landau quasiparticles: I. A unified theory of transport and superfluidity in Fermi liquids
Pierre-Louis Taillat, Hadrien Kurkjian
We introduce a new renormalisation scheme to construct the Landau quasiparticles of Fermi fluids. The scheme introduces an energy cutoff to remove the resonant couplings, enab…
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…