The vortex generation in superfluid helium and the role of neighbouring vortices

The thermal activation or quantum tunneling is believed to be necessary for the vortex nucleated near a wall to escape from its vicinity, and for the vortex nucleated in the bulk to reach the critical size above which it can increase according to its own dynamics. This paper suggests the idea that there exists the possibility to understand these processes (without leaving the framework of hydrodynamics) as the result of the simultaneous presence of several vortices or the interaction between various sections of vortex lines.