Quantum sensing with arbitrary frequency resolution via correlation measurements
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866917986853453824 |
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| author | Yoon, Jungbae Zhong, Keyuan Wang, Guoqing Li, Boning Lee, Donghun Cappellaro, Paola |
| author_facet | Yoon, Jungbae Zhong, Keyuan Wang, Guoqing Li, Boning Lee, Donghun Cappellaro, Paola |
| contents | Achieving high-frequency spectral resolution with quantum sensors, while crucial in fields ranging from physical to biological sciences, is challenging due to their finite coherence time. Here, we introduce a novel protocol that achieves this goal by measuring phase correlations of AC magnetic fields using ensembles of NV centers. Our method extends the sensing dynamic range to frequencies higher than the system's Rabi frequency while achieving arbitrary frequency resolution, limited only by the target field coherence time. Moreover, our approach operates more robustly with respect to the magnetic field's amplitude. Thanks to this robustness, our protocol allows the application of more $π$-pulses in pulse sequences such as CPMG, enabling the decoupling of a broader range of frequency noise. The higher harmonics generated in this process continue to act as a part of the signal, ultimately improving the frequency resolution. This method paves the way for achieving arbitrary frequency resolution with improved performances, making it highly versatile for quantum sensing applications across diverse scientific fields. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_12134 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum sensing with arbitrary frequency resolution via correlation measurements Yoon, Jungbae Zhong, Keyuan Wang, Guoqing Li, Boning Lee, Donghun Cappellaro, Paola Quantum Physics Applied Physics Achieving high-frequency spectral resolution with quantum sensors, while crucial in fields ranging from physical to biological sciences, is challenging due to their finite coherence time. Here, we introduce a novel protocol that achieves this goal by measuring phase correlations of AC magnetic fields using ensembles of NV centers. Our method extends the sensing dynamic range to frequencies higher than the system's Rabi frequency while achieving arbitrary frequency resolution, limited only by the target field coherence time. Moreover, our approach operates more robustly with respect to the magnetic field's amplitude. Thanks to this robustness, our protocol allows the application of more $π$-pulses in pulse sequences such as CPMG, enabling the decoupling of a broader range of frequency noise. The higher harmonics generated in this process continue to act as a part of the signal, ultimately improving the frequency resolution. This method paves the way for achieving arbitrary frequency resolution with improved performances, making it highly versatile for quantum sensing applications across diverse scientific fields. |
| title | Quantum sensing with arbitrary frequency resolution via correlation measurements |
| topic | Quantum Physics Applied Physics |
| url | https://arxiv.org/abs/2504.12134 |