4–29 Sept 2023
Albano Building 3
Europe/Stockholm timezone

Surprises in Fermi liquid theory: Anomalously long lifetimes in 2D systems

7 Sept 2023, 11:00
1h
Albano 3: 4205 - SU Conference Room (40 seats) (Albano Building 3)

Albano 3: 4205 - SU Conference Room (40 seats)

Albano Building 3

Hannes Alfvéns väg 12, 10691 Stockholm, Sweden
40

Speaker

Johannes Hoffman

Description

I will give an introduction to transport phenomena and transport calculations in non-relativistic Fermi liquids. Such systems encompass interacting electron gases in the hydrodynamic regime, which has recently been accessed experimentally, but also atomic quantum gases. In particular, I will present calculations of the shear viscosity within kinetic theory at finite temperature. I will then discuss in more detail the structure of quasiparticle scattering in the presence of a Fermi surface in two-dimensional systems, which reveals a parity-dependence of relaxation rates. Such an odd-even effect gives rise to a new transport regime with long-lived odd-parity modes in addition to hydrodynamic ones, and the talk will conclude by discussing signatures of this regime in the collective mode spectrum.

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