Longitudinal NMR and Spin States in the A-like Phase of 3He in Aerogel

TL;DR

This paper investigates different spin states of superfluid 3He in aerogel, revealing distinct longitudinal and transverse NMR behaviors in A-like and B-like phases, highlighting complex spin dynamics in disordered media.

Contribution

It demonstrates the existence of multiple spin states in 3He aerogel, with distinct longitudinal NMR signals, advancing understanding of superfluid spin properties in disordered environments.

Findings

Two spin states in A-like phase with different NMR signatures

Longitudinal NMR observed in B-like phase

Distinct transverse NMR properties for different states

Abstract

It was found that two different spin states of the A-like phase can be obtained in aerogel sample. In one of these states we have observed the signal of the longitudinal NMR, while in another state no trace of such a signal was found. The states also have different properties in transverse NMR experiments. Longitudinal NMR signal was also observed in the B-like phase of 3He in aerogel.