Published on September 19, 2025–Updated on November 20, 2025
Dates
on the November 24, 2025
10h30
Location
Institut de Physique de Nice
Stairs first floor
Out-of-equilibrium dynamics of ultracold fermionic fluids
Fluid seminars
Abstract:
Homogeneous dilute gases of fermions confined in optical box potentials now offer a clean platform where geometry and interaction strength can be controlled with high precision [1]. This enables stringent tests of quantum transport properties. I will discuss recent experiments on driven uniform fermionic gases of 6Li atoms [2]: (i) the measurement of the celebrated Lindhard density response of free fermions, and the emergence of the collective sound mode as interaction strength increases; (ii) the reconstruction of quasiparticle distributions across interaction regimes and (iii) the study of sound attenuation in this crossover Fermi liquid. These results provide stringent benchmarks for first-principle theories of the Fermi liquid and open interesting prospects in studying far-from-equilibrium turbulent dynamics in those systems.
[1] N. Navon, R.P. Smith, Z. Hadzibabic, Nature Phys. 17, 1334 (2021)
[2] S. Huang et al., Phys. Rev. X 15, 011074 (2025)
