Abstract
Atom interferometer has been proven to be a powerful tool for precision metrology. Here we propose a cavity-aided nonlinear atom interferometer, based on the quasi-periodic spin mixing dynamics of an atomic spin-1 Bose–Einstein condensate trapped in an optical cavity. We unravel that the phase sensitivity can be greatly enhanced with the cavity-mediated nonlinear interaction. The influence of encoding phase, splitting time and recombining time on phase sensitivity are carefully studied. In addition, we demonstrate a dynamical phase transition in the system. Around the criticality, a small cavity light field variation can arouse a strong response of the atomic condensate, which can serve as a new resource for enhanced sensing. This work provides a robust protocol for cavity-enhanced metrology.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos. 12074120 and 11904063) and the Key Scientific Research Project of Colleges and Universities in Henan Province (No. 23A140001).
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Zheng, R., Qin, J., Chen, B. et al. Cavity-enhanced metrology in an atomic spin-1 Bose–Einstein condensate. Front. Phys. 19, 32204 (2024). https://doi.org/10.1007/s11467-023-1372-5
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DOI: https://doi.org/10.1007/s11467-023-1372-5