Continuous Collective Strong Coupling of Strontium Atoms to a High Finesse Ring Cavity
We demonstrate continuous loading and strong collective coupling of atoms to a high finesse ring cavity. A series of spatially separated laser cooling stages delivers a continuous flux of 2.1(3)×10^{7} ^{88}Sr atoms/s into an intracavity magic wavelength lattice where the atoms are deterministically transported inside the ring cavity. We observe a continuous atom-cavity vacuum Rabi splitting, demonstrating the first steady-state strong collective coupling on a narrow linewidth atomic transition. This Letter opens the path to future continuous cold atom devices, such as a continuous wave superradiant laser with millihertz linewidth and low vibration sensitivity, enabling searches for new physics and technologies.
Authors
- Zhijing Niu (ORCID: https://orcid.org/0009-0002-5776-9606)
- Julia Cline (ORCID: https://orcid.org/0000-0002-6749-221X)
- Vera M. Schäfer (ORCID: https://orcid.org/0000-0002-1000-3737)
- Dylan J. Young (ORCID: https://orcid.org/0000-0003-3461-7116)
- James K. Thompson (ORCID: https://orcid.org/0000-0003-1160-5112)
- Tai Hyun Yoon (ORCID: https://orcid.org/0000-0002-2408-9295)
Institutions
- Joint Institute for Laboratory Astrophysics (US)
- Max Planck Institute for Nuclear Physics (DE)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-01-10
- DOI
- https://doi.org/10.1103/physrevlett.134.013403
- Citations
- 8
- Primary Topic
- Cold Atom Physics and Bose-Einstein Condensates
- Type
- article
- Field-Weighted Citation Impact
- 9.97
Funders
- National Science Foundation
- U.S. Department of Energy
- Gerald R. Ford Presidential Foundation
- Alexander von Humboldt-Stiftung
- National Institute of Standards and Technology
- Defense Advanced Research Projects Agency