News and Views
Nature Physics 4, 346 - 347 (2008)
doi:10.1038/nphys953
Subject Categories: Atomic and molecular physics | Optical physics | Quantum physics
Cavity QED: Signs of anharmonicity
Howard Carmichael1
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Howard Carmichael is in the Department of Physics, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
e-mail: h.carmichael@auckland.ac.nz
Abstract
The energy of an atom binding one photon in a cavity can be derived classically. But when two photons are bound to the atom, signatures of light quantization appear in the spectrum. These have now been observed in the optical domain.
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