NMR in Superfluid A-like Phase of $^3$He Confined in Globally Deformed Aerogel in Tilted Magnetic Field

TL;DR

This paper investigates NMR spectra in superfluid $^3$He confined in deformed aerogel under tilted magnetic fields, revealing how deformation affects dipole frequency shifts and the stability of spin precession modes.

Contribution

It provides a comparative analysis of dipole frequency shifts in axially deformed aerogel, highlighting the impact of deformation on the stability of superfluid phases.

Findings

Dipole frequency shifts differ between axially compressed and stretched aerogel.

In axially stretched aerogel, the stability region of spin precession is narrow due to the U(1)LIM effect.

Deformation influences the stability and spectral features of superfluid $^3$He in aerogel.

Abstract

NMR spectra in superfluid A-like phases confined in axially deformed aerogel in presence of a magnetic field inclined with respect to deformation axis is considered. The characteristic features of dipole frequency shift in axially compressed and axially stretched cases are compared. In particular, it is shown that in axially stretched aerogel environment the stability region of coherently spin precessing mode is rather narrow due to the U(1)LIM effect.