Abstract.
We consider the situation where a two-level atom is placed in the vicinity of the center of a spherical cavity with a large numerical aperture. The vacuum field at the center of the cavity is actually equivalent to the one obtained in a microcavity, and both the dissipative and the reactive parts of the atom’s spontaneous emission are significantly modified. Using an explicit calculation of the spatial dependence of the radiative relaxation rate and of the associated level shift, we show that for a weakly excitating light field, the atom can be attracted to the center of the cavity by vacuum-induced light shifts.
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Bibliographic note: this paper was written in 1995, and it is presented here in its original form with minor editing. The results were initially presented by Jean-Marc Daul at the conference Quantum Optics in Wavelength Scale Structures, Cargèse, Corsica, August 26-September 2, 1995. The same results were also presented by Philippe Grangier at the Annual Meeting of the TMR Network Microlasers and Cavity QED, Les Houches, France, April 21-25, 1997
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Daul, JM., Grangier, P. Vacuum-field atom trapping in a wide aperture spherical resonator. Eur. Phys. J. D 32, 195–200 (2005). https://doi.org/10.1140/epjd/e2005-00019-7
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DOI: https://doi.org/10.1140/epjd/e2005-00019-7