期刊
SCIENCE
卷 361, 期 6404, 页码 794-796出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aat5162
关键词
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资金
- National Science Foundation through the Center for Dynamics and Control of Materials: an NSF MRSEC [DMR-1720595]
- U.S. Army Research Office [W911NF-17-1-0259]
- JST PRESTO program [JPMJPR1767]
- KAKENHI [26287087]
- ImPACT Program of the Council for Science, Technology and Innovation (Cabinet Office, government of Japan)
- Deutsche Forschungsgemeinschaft [SFB 1242, TP B08]
- European Commission (EU Career Integration grant) [EU CIG 334324 LIGHTER]
- Max Planck Society
- National Natural Science Foundation of China [11774217, 11674213, 61735010, 11604202]
- Shanghai Municipal Education Commission (Young Eastern Scholar) [QD2015020]
- Science and Technology Commission of Shanghai Municipality (Shanghai Rising-Star Program) [18QA1401700]
- Shanghai Educational Development Foundation (Chen Guang project) [16CG45]
- State Key Laboratory of Solidification Processing in NWPU [SKLSP201703]
- National Natural Science Foundation of China 26287087)
- and the ImPACT Program of the Council for Science, Technology and Innovation (Cabinet Office, government of Japan). D.T. acknowledges financial support from the Deutsche Forschungsgemeinschaft (SFB 12 [51672171]
The interaction of N two-level atoms with a single-mode light field is an extensively studied many-body problem in quantum optics, first analyzed by Dicke in the context of superradiance. A characteristic of such systems is the cooperative enhancement of the coupling strength by a factor of root N. In this study, we extended this cooperatively enhanced coupling to a solid-state system, demonstrating that it also occurs in a magnetic solid in the form of matter-matter interaction. Specifically, the exchange interaction of N paramagnetic erbium(III) (Er3+) spins with an iron(III) (Fe3+) magnon field in erbium orthoferrite (ErFeO3) exhibits a vacuum Rabi splitting whose magnitude is proportional to root N. Our results provide a route for understanding, controlling, and predicting novel phases of condensed matter using concepts and tools available in quantum optics.
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