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Collective Multimode Vacuum Rabi Splitting
W Guerin1, T S do Espirito Santo2,3, P Weiss1
1Université Côte d'Azur, CNRS, INPHYNI, F-06560 Valbonne, France.
Physical Review Letters
|January 11, 2020
Summary
Researchers observed collective multimode vacuum Rabi splitting in free space, a phenomenon where atoms interact with many light modes. This coupling, measured by atomic cloud thickness, leads to observable splitting in scattered light intensity.
Area of Science:
- Quantum optics
- Atomic physics
- Condensed matter physics
Background:
- Vacuum Rabi splitting typically occurs in optical cavities, involving strong coupling between a single atom and a single light mode.
- Free-space interactions involve coupling to a continuum of electromagnetic modes, posing a challenge for observing collective effects.
Purpose of the Study:
- To experimentally demonstrate collective multimode vacuum Rabi splitting in free space.
- To investigate the role of atomic cloud optical thickness in mediating this coupling.
- To validate theoretical models describing the phenomenon.
Main Methods:
- Utilizing a cloud of atoms in free space to interact with light.
- Monitoring Rabi oscillations in the scattered light intensity.
- Comparing experimental results with a linear-dispersion theory.
Main Results:
- Experimental observation of collective multimode vacuum Rabi splitting.
- Demonstration that the optical thickness of the atomic cloud quantifies the coupling strength to the continuum of modes.
- Rabi oscillations in scattered intensity directly reflect the splitting phenomenon.
Conclusions:
- Collective multimode vacuum Rabi splitting is achievable in free space.
- The optical thickness is a critical parameter for controlling and observing this effect.
- The observed phenomenon is well-described by linear-dispersion theory, providing a framework for understanding light-matter interactions in extended atomic systems.
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