Continuous cloud position spectroscopy using a magneto-optical trap
Fuente:
arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866918394613202944 |
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| author | Heizenreder, Benedikt Sitaram, Ananya Boughdachi, Sana von Hörsten, Andrew Xie, Yan Brodschelm, Andreas Schreck, Florian |
| author_facet | Heizenreder, Benedikt Sitaram, Ananya Boughdachi, Sana von Hörsten, Andrew Xie, Yan Brodschelm, Andreas Schreck, Florian |
| contents | We demonstrate a continuous spectroscopy technique with frequency sensitivity well below the natural transition linewidth, while maintaining a locking range hundreds of times larger. The method exploits the position dependence of a continuous, broadband magneto-optical trap operating on the 7.5 kHz-wide intercombination line of strontium. We show that the frequency sensitivity is fundamentally insensitive to the effective MOT laser linewidth. By applying active feedback on the MOT position to a dispersion-optimized frequency comb, which serves as the reference for stabilizing the MOT laser [1], we achieve a frequency instability below $4.4\times10^{-13}$ after 400 s of averaging in both the optical and radio-frequency domains, surpassing the performance of conventional hot-vapor modulation transfer spectroscopy. Our method is a broadly applicable alternative route to frequency references in the high $10^{-14}$ range around 100 s. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_07736 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Continuous cloud position spectroscopy using a magneto-optical trap Heizenreder, Benedikt Sitaram, Ananya Boughdachi, Sana von Hörsten, Andrew Xie, Yan Brodschelm, Andreas Schreck, Florian Atomic Physics Quantum Gases We demonstrate a continuous spectroscopy technique with frequency sensitivity well below the natural transition linewidth, while maintaining a locking range hundreds of times larger. The method exploits the position dependence of a continuous, broadband magneto-optical trap operating on the 7.5 kHz-wide intercombination line of strontium. We show that the frequency sensitivity is fundamentally insensitive to the effective MOT laser linewidth. By applying active feedback on the MOT position to a dispersion-optimized frequency comb, which serves as the reference for stabilizing the MOT laser [1], we achieve a frequency instability below $4.4\times10^{-13}$ after 400 s of averaging in both the optical and radio-frequency domains, surpassing the performance of conventional hot-vapor modulation transfer spectroscopy. Our method is a broadly applicable alternative route to frequency references in the high $10^{-14}$ range around 100 s. |
| title | Continuous cloud position spectroscopy using a magneto-optical trap |
| topic | Atomic Physics Quantum Gases |
| url | https://arxiv.org/abs/2509.07736 |