Strong atom–field coupling for Bose–Einstein condensates in an optical cavity on a chip

Yves Colombe, Tilo Steinmetz, Guilhem Dubois, Felix Linke, David Hunger and Jakob Reichel ()
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Yves Colombe: Laboratoire Kastler Brossel, ENS/UPMC-Paris 6/CNRS, 24 rue Lhomond, 75005 Paris, France
Tilo Steinmetz: Laboratoire Kastler Brossel, ENS/UPMC-Paris 6/CNRS, 24 rue Lhomond, 75005 Paris, France
Guilhem Dubois: Laboratoire Kastler Brossel, ENS/UPMC-Paris 6/CNRS, 24 rue Lhomond, 75005 Paris, France
Felix Linke: Laboratoire Kastler Brossel, ENS/UPMC-Paris 6/CNRS, 24 rue Lhomond, 75005 Paris, France
David Hunger: Max-Planck-Institut für Quantenoptik/LMU, Schellingstr. 4, 80799 München, Germany
Jakob Reichel: Laboratoire Kastler Brossel, ENS/UPMC-Paris 6/CNRS, 24 rue Lhomond, 75005 Paris, France

Nature, 2007, vol. 450, issue 7167, 272-276

Abstract: When light matters A central goal of physics is to understand the interaction between matter and light. In cavity quantum electrodynamics, an optical resonator can be used to enhance this interaction for atoms. Previous studies have demonstrated 'strong coupling', a regime in which the radiative properties of individual atoms are intimately linked to the state of the optical field. Two groups have now demonstrated a conceptually new regime of cavity quantum electrodynamics. The atoms are cooled until they form a Bose–Einstein condensate (occupying a single mode of a matter-wave field) and couple identically and strongly to the light field, sharing a single excitation. This may open the way for applications in quantum communication and information processing.

Date: 2007
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DOI: 10.1038/nature06331

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