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Low-frequency quantum sensing
- Publication Year :
- 2022
- Publisher :
- arXiv, 2022.
-
Abstract
- Exquisite sensitivities are a prominent advantage of quantum sensors. Ramsey sequences allow precise measurement of direct current fields, while Hahn-echo-like sequences measure alternating current fields. However, the latter are restrained for use with high-frequency fields (above approximately $1$ kHz) due to finite coherence times, leaving less-sensitive noncoherent methods for the low-frequency range. In this paper, we propose to bridge the gap with a fitting-based algorithm with a frequency-independent sensitivity to coherently measure low-frequency fields. As the algorithm benefits from coherence-based measurements, its demonstration with a single nitrogen-vacancy center gives a sensitivity of $9.4$ nT Hz$^{-0.5}$ for frequencies below about $0.6$ kHz down to near-constant fields. To inspect the potential in various scenarios, we apply the algorithm at a background field of tens of nTs, and we measure low-frequency signals via synchronization.<br />Comment: 12 pages, 5 figures; supp 14 pages, 9 figures
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....e3ac2987a8203f1cde1da6346eb70ecd
- Full Text :
- https://doi.org/10.48550/arxiv.2209.13870