Non-linear Dynamics of the trapped Quantum Vortex in Superfluid 4 He

Abstract: 

In this talk, we discuss a series of experiments with nanomechanical resonators submerged in superfluid helium from the hydrodynamic recime at the vicinity of the superfluid transition temperature down to the ballistic regime at milli-Kelvin temperatures. In our investigation, we achieved unprecedented resolution in capturing, monitoring, and characterizing single vortex events, including their capture, interactions, and eventual release, all with millisecond-level temporal precision. This enables the probe of the local vortex dynamics of captured vortex lifetimes.