Efficient decoupling and recoupling in solid state NMR for quantum computation

TL;DR

This paper proposes a new pulse sequence scheme in solid-state NMR that enhances scalability for quantum computing by efficiently decoupling and recoupling large dipolar spin networks with minimal overhead.

Contribution

It introduces a novel combination of broadband and band-selective pulse sequences for scalable control of large spin networks in solid-state NMR quantum computing.

Findings

Overhead for selective coupling is independent of the number of spins.

The scheme is feasible within certain time-scale constraints.

Potential to improve scalability of solid-state NMR quantum architectures.

Abstract

A scheme for decoupling and selectively recoupling large networks of dipolar-coupled spins is proposed. The scheme relies on a combination of broadband, decoupling pulse sequences applied to all the nuclear spins with a band-selective pulse sequence for single spin rotations or recoupling. The evolution-time overhead required for selective coupling is independent of the number of spins, subject to time-scale constraints, for which we discuss the feasibility. This scheme may improve the scalability of solid-state-NMR quantum computing architectures.