Two sounds and turbulence in shaken 2D Bose gases

Zoran Hadzibabic (U of Cambridge)

Nov 29. 2021, 14:35 — 15:10

I will discuss our recent experiments on continuously driven box-trapped 2D Bose gases. We have observed first and second sound in a hydrodynamic 2D Bose gas, which is the first such observation in a BKT superfluid [1]. The measured speeds of the two sounds allow extraction of the superfluid density, which agrees with the expected universal jump at the BKT critical point. I will also discuss our new results on strongly driven 2D gases in which a direct turbulent cascade emerges.

[1] P. Christodoulou et al., Nature 594, 191 (2021).

Further Information
Erwin Schrödinger Institute - virtual
Associated Event:
Topology, Disorder, and Hydrodynamics in Non-equilibrium Quantum Matter (Online Workshop)
Jörg Schmiedmayer (TU Vienna)
Maksym Serbyn (ISTA, Klosterneuburg)
Romain Vasseur (UMass Amherst)