Cavity QED with a Bose–Einstein condensate

Ferdinand Brennecke, Tobias Donner, Stephan Ritter, Thomas Bourdel, Michael Köhl and Tilman Esslinger ()
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Ferdinand Brennecke: Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland
Tobias Donner: Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland
Stephan Ritter: Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland
Thomas Bourdel: Laboratoire Charles Fabry, Institut d'Optique, Campus Polytechnique, RD 128, F91127 Palaiseau cedex, France
Michael Köhl: Cavendish Laboratory, University of Cambridge
Tilman Esslinger: Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland

Nature, 2007, vol. 450, issue 7167, 268-271

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/nature06120

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