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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2509.13486 |
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| _version_ | 1866914041181503488 |
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| author | Zhang, Shaobo Wang, Jingyao Sun, George van de Wetering, Johannes J. Romalis, Michael V. |
| author_facet | Zhang, Shaobo Wang, Jingyao Sun, George van de Wetering, Johannes J. Romalis, Michael V. |
| contents | Nuclear spin comagnetometers offer exceptional precision in measurements of spin energy levels and exhibit long-term stability, making them powerful tools for probing spin-dependent physics beyond the Standard Model as well as for inertial rotation sensing. We describe a new $^{3}$He-$^{21}$Ne Ramsey comagnetometer operating with an in-situ $^{87}$Rb magnetometer for initialization and sensing of nuclear spins. During free precession of nuclear spins we turn off all lasers and introduce a microwave field to suppress back-action from Rb atoms. We demonstrate that scalar and dipolar interactions between nuclear spins can be eliminated via control of the polarized sample geometry. These improvements result in a bias-free measurement with a frequency sensitivity of 0.6 nHz after 6 hours of integration. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_13486 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A $^{3}$He-$^{21}$Ne Ramsey Comagnetometer with sub-nHz frequency resolution Zhang, Shaobo Wang, Jingyao Sun, George van de Wetering, Johannes J. Romalis, Michael V. Atomic Physics Instrumentation and Detectors Nuclear spin comagnetometers offer exceptional precision in measurements of spin energy levels and exhibit long-term stability, making them powerful tools for probing spin-dependent physics beyond the Standard Model as well as for inertial rotation sensing. We describe a new $^{3}$He-$^{21}$Ne Ramsey comagnetometer operating with an in-situ $^{87}$Rb magnetometer for initialization and sensing of nuclear spins. During free precession of nuclear spins we turn off all lasers and introduce a microwave field to suppress back-action from Rb atoms. We demonstrate that scalar and dipolar interactions between nuclear spins can be eliminated via control of the polarized sample geometry. These improvements result in a bias-free measurement with a frequency sensitivity of 0.6 nHz after 6 hours of integration. |
| title | A $^{3}$He-$^{21}$Ne Ramsey Comagnetometer with sub-nHz frequency resolution |
| topic | Atomic Physics Instrumentation and Detectors |
| url | https://arxiv.org/abs/2509.13486 |