aiqbench analysis
This paper proposes a way to measure both the magnitude and direction of a magnetic field with nitrogen-vacancy diamond sensors without prior knowledge of the field, by using elliptically polarized microwaves to select spin orientations. If the claim holds in practice, it removes a calibration requirement that has limited these sensors in medical, industrial, and navigation settings. The abstract asserts the result without reporting benchmark numbers, so readers should check the experimental sensitivity and accuracy before judging its practical impact.
Unconditional full vector magnetometry using spin selectivity in Nitrogen Vacancy centers in diamond
arXiv:2602.12090v2 Announce Type: replace Abstract: Quantum sensors based on nitrogen vacancy (NV) centers in diamond have been a central topic in the sensing community for more than a decade. The extraordinary properties at room temperature of the spin system in diamond have made it one of the most prominent quantum platforms for the development of commercial quantum sensors. In particular, the sensitivity of the electronic spin in NV centers has made diamond-based magnetic sensors of special interest for their potential application in medical, industrial or navigation solutions. However, the use of these sensors for universal vector magnetometry was constrained by the need for previous knowledge on the field being measured to fully exploit their benefits. In this work, we show a method to perform unconditional vector magnetometry without the need of external information on the magnetic field, based only on the spatial arrangement of the diamond and the microwave antenna combination. While previous NV-based vector magnetometry methods require partial knowledge of the magnetic field (e.g. a calibrated bias field), we exploit the possibilities of selecting particular directions of the spins in the diamond with elliptically polarized microwave fields. We prove that our method allows to estimate both magnitude and direction of external magnetic fields without further assumptions or constraints.
Abstract:Quantum sensors based on nitrogen vacancy (NV) centers in diamond have been a central topic in the sensing community for more than a decade. The extraordinary properties at room temperature of the spin system in diamond have made it one of the most prominent quantum platforms for the development of commercial quantum sensors. In particular, the sensitivity of the electronic spin in NV centers has made diamond-based magnetic sensors of special interest for their potential application in medical, industrial or navigation solutions. However, the use of these sensors for universal vector magnetometry was constrained by the need for previous knowledge on the field being measured to fully exploit their benefits. In this work, we show a method to perform unconditional vector magnetometry without the need of external information on the magnetic field, based only on the spatial arrangement of the diamond and the microwave antenna combination. While previous NV-based vector magnetometry methods require partial knowledge of the magnetic field (e.g. a calibrated bias field), we exploit the possibilities of selecting particular directions of the spins in the diamond with elliptically polarized microwave fields. We prove that our method allows to estimate both magnitude and direction of external magnetic fields without further assumptions or constraints.
Quantum Physics (quant-ph); Applied Physics (physics.app-ph); Instrumentation and Detectors (physics.ins-det); Optics (physics.optics)
arXiv:2602.12090 [quant-ph]
(or arXiv:2602.12090v2 [quant-ph] for this version)
https://doi.org/10.48550/arXiv.2602.12090 Focus to learn more arXiv-issued DOI via DataCite
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