The effect of spin-lattice relaxation on multiple-quantum NMR coherences in solids

TL;DR

This paper develops a phenomenological theory describing how spin-lattice relaxation affects multiple-quantum NMR coherences in solids, with implications for understanding decoherence in quantum entanglement.

Contribution

It introduces a new theoretical framework for analyzing spin-lattice relaxation effects on multiple-quantum coherences in dipolar coupled spins.

Findings

Intensities depend on spin-lattice relaxation time

Theory applies to finite spin chains with nearest neighbor interactions

Discusses implications for quantum entanglement decoherence

Abstract

A phenomenological theory of spin-lattice relaxation of multiple-quantum coherences in systems of two dipolar coupled spins at low temperatures is developed. Intensities of multiple-quantum NMR coherences depending on the spin-lattice relaxation time are obtained. It is shown that the theory is also applicable to finite spin chains when the approximation of nearest neighbour interaction is used. An application of this theory to an estimation of the influence of decoherence processes on quantum entanglement and its fluctuations is briefly discussed.