November 06 2012

New article:Phys. Rev. A 86, 053402 (2012).

Cooling the motion of a trapped atom with a cavity field
Marc Bienert and Giovanna Morigi
Phys. Rev. A 86, 053402 (2012).

We theoretically analyze the cooling dynamics of an atom which is tightly trapped inside a high-finesse optical resonator. Cooling is achieved by suitably tailored scattering processes, in which the atomic dipole transition either scatters a cavity photon into the electromagnetic field external to the resonator, or performs a stimulated emission into the cavity mode, which then dissipates via the cavity mirrors. We identify the parameter regimes in which the atom center-of-mass motion can be cooled into the ground state of the external trap. We predict that, in particular, for high cooperativities, interference effects mediated by the atomic transition may lead to higher efficiencies. The dynamics is compared with the cooling dynamics of a trapped atom inside a resonator studied by Zippilli and Morigi [ Phys. Rev. Lett. 95 143001 (2005)] where the atom, instead of the cavity, is driven by a laser field.

back to overview of all news