Sergey Nazarenko

Feb 26, 2024 | link.aps.org | Thomas Frisch |Université Côte d'Azur |Sergey Nazarenko |Sergio Rica

The transition from a free vortex superflow to a dissipative vortex flow in a superfluid remains an open problem, in particular because in real experiments, microscopic asperities on the walls play a major role since the relevant scales in a superfluid motion are basically of atomic scale. Here we model a superflow using the Gross-Pitaevskii mean-field equation in a domain with a rigid sinusoidal boundary.

Jan 3, 2024 | link.aps.org | Victor S. L'vov |Anna Pomyalov |Sergey Nazarenko |Université Côte d'Azur

We consider flux equilibrium in dissipative nonlinear wave systems subject to external energy pumping. In such systems, the elementary excitations, or quasiparticles, can create a Bose-Einstein condensate.