Multichannel highly sensitive diamond quantum magnetometer
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911173520130048 |
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| author | Yoshimura, Atsumi Kanamoto, Ayumi Sekiguchi, Naota Shinei, Chikara Miyakawa, Masashi Taniguchi, Takashi Teraji, Tokuyuki Abe, Hiroshi Onoda, Shinobu Ohshima, Takeshi Iwasaki, Takayuki Hatano, Mutsuko |
| author_facet | Yoshimura, Atsumi Kanamoto, Ayumi Sekiguchi, Naota Shinei, Chikara Miyakawa, Masashi Taniguchi, Takashi Teraji, Tokuyuki Abe, Hiroshi Onoda, Shinobu Ohshima, Takeshi Iwasaki, Takayuki Hatano, Mutsuko |
| contents | We demonstrate a highly sensitive real-time magnetometry method at two measurement points. This magnetometry method is based on the frequency-division multiplexing of continuous-wave optically detected magnetic resonance. We use two ensembles of nitrogen-vacancy (NV) centers separated by 3.6 mm to measure a magnetic field. A different bias field is applied to the two NV ensembles to resolve the resonance peak for each ensemble in the frequency space and enables the multiplexed magnetometry at the two points. The sensitivities achieved at the measurement points are $21~\mathrm{pT/\sqrt{Hz}}$ and $22~\mathrm{pT/\sqrt{Hz}}$. The proposed magnetometry method can be expanded to include more measurement points and shorter spacing. The capability of real-time measurement at numerous points with short spacing and high sensitivity is beneficial for various applications, including biomagnetic sensing, geophysical research, and material science. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_20055 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multichannel highly sensitive diamond quantum magnetometer Yoshimura, Atsumi Kanamoto, Ayumi Sekiguchi, Naota Shinei, Chikara Miyakawa, Masashi Taniguchi, Takashi Teraji, Tokuyuki Abe, Hiroshi Onoda, Shinobu Ohshima, Takeshi Iwasaki, Takayuki Hatano, Mutsuko Quantum Physics Atomic Physics We demonstrate a highly sensitive real-time magnetometry method at two measurement points. This magnetometry method is based on the frequency-division multiplexing of continuous-wave optically detected magnetic resonance. We use two ensembles of nitrogen-vacancy (NV) centers separated by 3.6 mm to measure a magnetic field. A different bias field is applied to the two NV ensembles to resolve the resonance peak for each ensemble in the frequency space and enables the multiplexed magnetometry at the two points. The sensitivities achieved at the measurement points are $21~\mathrm{pT/\sqrt{Hz}}$ and $22~\mathrm{pT/\sqrt{Hz}}$. The proposed magnetometry method can be expanded to include more measurement points and shorter spacing. The capability of real-time measurement at numerous points with short spacing and high sensitivity is beneficial for various applications, including biomagnetic sensing, geophysical research, and material science. |
| title | Multichannel highly sensitive diamond quantum magnetometer |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2509.20055 |