Spontaneous breaking of local mirror symmetry in superfluid and in BEC turbulence

TL;DR

This paper investigates how local mirror symmetry can spontaneously break in superfluid helium II and BEC turbulence, revealing dominant helical chaos through simulations and experiments.

Contribution

It demonstrates the spontaneous local mirror symmetry breaking in superfluid and BEC turbulence, highlighting the role of helical chaos in these quantum fluids.

Findings

Local mirror symmetry can spontaneously break in superfluid and BEC turbulence.

Helical distributed chaos dominates turbulent dynamics in these systems.

Results are supported by direct numerical simulations and laboratory measurements.

Abstract

There exist inherent mechanisms of spontaneous breaking of local mirror symmetry (parity) in fluid turbulence. A good example is Kerr's mechanism based on the inviscid vortex interactions. Such interactions can result in the appearance of the local adjacent regions with strong oppositely signed helicity, while the global (net) helicity still remains zero due to the global mirror symmetry. It is shown, using results of direct numerical simulations and laboratory measurements, that the spontaneous breaking of local mirror symmetry can dominate turbulent dynamics in the superfluid helium II and in the Bose-Einstein condensate turbulence. The notion of helical distributed chaos has been used for this purpose.