Hydrodynamics and charge fluctuations in low dimensional quantum systems

28.04.2026 13:00 – 14:00

The advent of quantum simulators and processors has enabled the measurement of not only the expectation values of local observables, but also of their full quantum statistics, including fluctuations and space-time correlations. In this talk, I will present a theoretical framework for the dynamics of charge fluctuations in generic many-body quantum systems, and show how non-equilibrium fluctuations can be used experimentally to extract transport coefficients such as conductivities and diffusion constants. I will then discuss notable deviations from this conventional behavior in a broad class of systems, including Dirac fluids describing the hydrodynamic regime of graphene and Dirac semimetals at charge neutrality. In particular, I will argue that charge noise in Dirac fluids, as well as in certain two-component classical gases, is parametrically enhanced compared to that in conventional diffusive metals.

Lieu

Bâtiment: Ecole de Physique

Auditoire Stückelberg

entrée libre