Friday 17th April – at 14.30
Department of Physics, Seminar Room - ground floor
dr. Dmitry Kobyakov
(Technische Universitaet Darmstadt, Germany)
"Introduction to quantum turbulence in superfluid mixtures"
Abstract:
We study turbulence in a two-component Bose-Einstein condensate. By solving the coupled Gross-Pitaevskii equations, we
show a possibility of generation of turbulence on late stages of dynamics of unstable capillary waves on an interface between
two superfluids. Numerical analysis reveals Kolmogorov scaling in the incompressible kinetic energy, and a spin-turbulent
scaling in the pseudo-spin energy.
Analytical calculations provide description of hydrodynamic phenomena: capillary waves, counter-flow instability, RayleighTaylor instability, Kelvin-Helmholtz instability. The physical parameters used in calculations suggest that the process may be
realized experimentally which opens a new way to generate and observe quantum turbulence in the laboratory.
Contacts:
Staff Dipartimento di Fisica
0461 28-1504-1575-2042
df.supportstaff@unitn.it
Scientific Coordinator:
dott. Iacopo Carusotto
Via Sommarive, 14 - 38123 Povo (Trento), Italy - Tel. +39 0461/281504-1575, Fax +39 0461/283934