Aug, 2018
Observation of Dicke cooperativity in magnetic interactions
Science
- Volume
- 361
- Number
- 6404
- First page
- 794
- Last page
- 797
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1126/science.aat5162
- Publisher
- American Association for the Advancement of Science ({AAAS})
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 N1/2. 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 N1/2. Our results provide a route for understanding, controlling, and predicting novel phases of condensed matter using concepts and tools available in quantum optics.
- Link information
- ID information
-
- DOI : 10.1126/science.aat5162
- ORCID - Put Code : 47665139