Nuclear Hyperpolarization Assisted Hybrid Quantum Sensor Magnetometry
Abstract
We propose a novel implementation of hybrid quantum sensor magnetometry employingcombined registers of electron and nuclear spins in diamonds endowed with high-density nitrogenvacancy(NV) defect centers. This proposal leverages our expertise in NV magnetometry, quantumcontrol, diamond microfabrication and optically pumped nuclear hyperpolarization. The latterentails mapping the NV electron spin resonance onto 13C nuclear spin states which can be read outwith high fidelity (SNR greater than 105) and absolutely no background. This NV-13C hybridthereby exploits the high 13C coherence and long lifetimes, along with optical polarizability of theNV electrons for magnetometry.Through preliminary experiments and detailed calculations, we have confirmed that ourhybrid sensor approach delivers high sensitivity, scalar and full-vector operation, background-freedetection, robustness against laser and microwave noise, and is free from technical requirementsof precise magnetic field alignment. It is, moreover, highly amenable to magnetometerminiaturization and can be deployed to strongly optically scattering environments, for instance, inunderwater magnetometry. Our proposed deployable DC magnetic sensor will have a scalarsensitivity better than 1pT/ and vector sensitivity better than 100T/, in a small portablefootprint ( 10cm3). By virtue of the close integration of optical and RF quantum magnetometryin the same platform, our approach portends Kalman feedback techniques of signals obtained fromboth modalities for background and drift suppression. Lastly, our proposed system harnesseslattice 13C nuclear spins as a resource for quantum sensing, and as such is a promising platform forentanglement assisted protocols directly applied to the nuclear spins for magnetometry and inertialsensing at the standard quantum limit.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 31, 2020
- Source ID
- N000142012806
Entities
People
- Ashok Ajoy
Organizations
- Office of Naval Research
- United States Navy
- University of California Regents