October 01 2013

New article: Phys. Rev. A 88, 033427 (2013)

Cooling of atomic ensembles in optical cavities: Semiclassical limit

Stefan Sch├╝tz, Hessam Habibian, and Giovanna Morigi
Phys. Rev. A 88, 033427 (2013)

The semiclassical dynamics of atoms, when the atoms are confined inside a standing-wave high-finesse resonator, is theoretically studied. The atoms are cooled by scattering processes in which the photons of a transverse laser are coherently scattered into the cavity mode. We derive a Fokker-Planck equation for the atomic center-of-mass variables which allows us to determine the equations of motion in the semiclassical limit for any value of the intensity of the laser field. We extract its prediction for the dynamics when the resonator is essentially in the vacuum state and the atoms are cooled by scattering photons into the cavity mode, which then decays. Its predictions for the stationary atomic distribution are compared with the ones of the Fokker-Planck equation by Domokos et al. [ J. Phys. B 34 187 (2001)], which has been derived under different assumptions. We find full agreement in the considered parameter regime.

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