Ground state cooling in a bad cavity
We study the mechanical effects of light on an atom trapped in a harmonic potential when an atomic dipole transition is driven by a laser and it is strongly coupled to a mode of an optical resonator. We investigate the cooling dynamics in the bad cavity limit, focusing on the case in which the effective transition linewidth is smaller than the trap frequency, hence when sideband cooling could be implemented. We show that quantum correlations between the mechanical actions of laser and cavity field can lead to an enhancement of the cooling efficiency with respect to sideband cooling. Such interference effects are found when the resonator losses prevail over spontaneous decay and over the rates of the coherent processes characterizing the dynamics.
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Document Type: Research Article
Affiliations: 1: Grup d'Optica, Departament de Fisica, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain 2: Abteilung Quantenphysik, Universität Ulm, 89069 Ulm, Germany
Publication date: July 1, 2007