Robust Dynamical Decoupling Sequences for Individual Nuclear Spin Addressing

TL;DR

This paper introduces non-equally spaced dynamical decoupling sequences that improve the selective addressing of individual nuclear spins using quantum sensors, demonstrating high robustness and resolution.

Contribution

It presents a novel pulse sequence scheme for high-resolution nuclear spin addressing that is robust against control errors and applicable to NV center sensors.

Findings

Enhanced selectivity in nuclear spin detection

Robustness against static and dynamic control errors

Successful identification of individual nuclear spins in ensembles

Abstract

We propose the use of non-equally spaced decoupling pulses for high-resolution selective addressing of nuclear spins by a quantum sensor. The analytical model of the basic operating principle is supplemented by detailed numerical studies that demonstrate the high degree of selectivity and the robustness against static and dynamic control field errors of this scheme. We exemplify our protocol with an NV center-based sensor to demonstrate that it enables the identification of individual nuclear spins that form part of a large spin ensemble.