title: Ground-state cooling for a trapped atom using cavity-induced double electromagnetically induced transparency.
abstract: We propose a cooling scheme for a trapped atom using the phenomenon of cavity-induced double electromagnetically induced transparency (EIT), where the atom comprising of four levels in tripod configuration is confined inside a high-finesse optical cavity. By exploiting one cavity-induced EIT, which involves one cavity photon and two laser photons, carrier transition can be eliminated due to the quantum destructive interference of excitation paths. Heating process originated from blue-sideband transition mediated by cavity field can also be prohibited due to the destructive quantum interference with the additional transition between the additional ground state and the excited state. As a consequence, the trapped atom can be cooled to the motional ground state in the leading order of the Lamb-Dicke parameters. In addition, the cooling rate is of the same order of magnitude as that obtained in the cavity-induced single EIT scheme.
authors.affiliation: Department of Physics, Huazhong Normal University, Wuhan 430079, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yi
authors.forename: Wen-ju
authors.initials: WJ
authors.lastname: Gu
authors.forename: Gao-xiang
authors.initials: GX
authors.lastname: Li
mesh_terms: D003080:Cold Temperature; D003198:Computer Simulation; D004574:Electromagnetic Fields; D008956:Models, Chemical; D012031:Refractometry / Q000379:methods*