Suspended Long-Lived NMR Echo in Solids

TL;DR

This paper demonstrates the creation of long-lived nuclear spin states in solids using a simple pulse sequence, enabling extended information storage and retrieval through multi-spin correlations.

Contribution

It introduces a novel 'suspended echo' experiment that significantly prolongs spin state lifetimes in dipolar-coupled nuclear spins in solids.

Findings

Long-lived spin states observed in solids.

Ability to encode and retrieve large amounts of information.

Spin states live many orders of magnitude longer than T2.

Abstract

We report an observation of extremely long-lived spin states in systems of dipolar-coupled nuclear spins in solids. The 'suspended echo' experiment uses a simple stimulated echo pulse sequence and creates non-equilibrium states which live many orders of magnitude longer than the characteristic time of spin-spin dynamics T2. Large amounts of information can be encoded in such long-lived states, stored in a form of multi-spin correlations, and subsequently retrieved by an application of a single 'reading' pulse.