Calculate and validate experimental signatures (NMR) of the single-quantum vortex in 3He-A

Calculate the experimental signatures of the single-quantum vortex in the A phase of superfluid helium-3, specifically the nuclear magnetic resonance response, and compare the calculated results quantitatively with existing observations to validate the vortex structure and flow predictions.

Background

The paper presents a first-principles Ginzburg–Landau calculation of the full structure of the single-quantum vortex (SQV) in superfluid 3He-A, resolving both the coherence-length hard core and dipolar-length soft core and revealing highly asymmetric superflow and channeling through the polar hard core.

While the structural details are computed, the authors note that deriving measurable experimental signatures, such as the NMR response associated with the SQV texture and flow, and confronting them with earlier and future experiments, remains to be done. This is important given past discrepancies between theoretical predictions and observed NMR signatures in A-phase vortices.