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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2503.01211 |
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| _version_ | 1866913715141476352 |
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| author | Ma, Zhu Han, Chengyin Tan, Zhi He, Haihua Shi, Shenszhen Kang, Xin Wu, Jiatao Huang, Jiahao Lu, Bo Lee, Chaohong |
| author_facet | Ma, Zhu Han, Chengyin Tan, Zhi He, Haihua Shi, Shenszhen Kang, Xin Wu, Jiatao Huang, Jiahao Lu, Bo Lee, Chaohong |
| contents | Cold-atom magnetometers can achieve an exceptional combination of superior sensitivity and high spatial resolution. One key challenge these quantum sensors face is improving the sensitivity within a given timeframe while preserving a high dynamic range. Here, we experimentally demonstrate an adaptive entanglement-free cold-atom magnetometry with both superior sensitivity and high dynamic range. Employing a tailored adaptive Bayesian quantum estimation algorithm designed for Ramsey interferometry using coherent population trapping (CPT), cold-atom magnetometry facilitates adaptive high-precision detection of a direct-current (d.c.) magnetic field with high dynamic range. Through implementing a sequence of correlated CPT-Ramsey interferometry, the sensitivity significantly surpasses the standard quantum limit with respect to total interrogation time. We yield a sensitivity of 6.8$\pm$0.1 picotesla per square root of hertz over a range of 145.6 nanotesla, exceeding the conventional frequentist protocol by 3.3$\pm$0.1 decibels. Our study opens avenues for the next generation of adaptive cold-atom quantum sensors, wherein real-time measurement history is leveraged to improve their performance. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_01211 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Adaptive cold-atom magnetometry mitigating the trade-off between sensitivity and dynamic range Ma, Zhu Han, Chengyin Tan, Zhi He, Haihua Shi, Shenszhen Kang, Xin Wu, Jiatao Huang, Jiahao Lu, Bo Lee, Chaohong Quantum Physics Cold-atom magnetometers can achieve an exceptional combination of superior sensitivity and high spatial resolution. One key challenge these quantum sensors face is improving the sensitivity within a given timeframe while preserving a high dynamic range. Here, we experimentally demonstrate an adaptive entanglement-free cold-atom magnetometry with both superior sensitivity and high dynamic range. Employing a tailored adaptive Bayesian quantum estimation algorithm designed for Ramsey interferometry using coherent population trapping (CPT), cold-atom magnetometry facilitates adaptive high-precision detection of a direct-current (d.c.) magnetic field with high dynamic range. Through implementing a sequence of correlated CPT-Ramsey interferometry, the sensitivity significantly surpasses the standard quantum limit with respect to total interrogation time. We yield a sensitivity of 6.8$\pm$0.1 picotesla per square root of hertz over a range of 145.6 nanotesla, exceeding the conventional frequentist protocol by 3.3$\pm$0.1 decibels. Our study opens avenues for the next generation of adaptive cold-atom quantum sensors, wherein real-time measurement history is leveraged to improve their performance. |
| title | Adaptive cold-atom magnetometry mitigating the trade-off between sensitivity and dynamic range |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2503.01211 |