Quantum control and sensing of nuclear spins by electron spins under power limitations

TL;DR

This paper introduces protocols for quantum control and sensing of nuclear spins using electron spins, effectively managing high-frequency targets despite power limitations and large frequency mismatches.

Contribution

The paper presents novel protocols enabling control and sensing of high-frequency nuclear spins with electron spins under power constraints and frequency mismatches.

Findings

Protocols successfully control high-frequency nuclear spins

Effective sensing achieved despite large frequency mismatches

Applicable in high magnetic field regimes

Abstract

State of the art quantum sensing experiments targeting frequency measurements or frequency addressing of nuclear spins require to drive the probe system at the targeted frequency. In addition, there is a substantial advantage to perform these experiments in the regime of high magnetic fields, in which the Larmor frequency of the measured spins is large. In this scenario we are confronted with a natural challenge of controlling a target system with a very high frequency when the probe system cannot be set to resonance with the target frequency. In this contribution we present a set of protocols that are capable of confronting this challenge, even at large frequency mismatches between the probe system and the target system, both for polarisation and for quantum sensing.