title: Conditional large Fock state preparation and field state reconstruction in cavity QED.
abstract: We propose a scheme for producing large Fock states in cavity QED via the implementation of a highly selective atom-field interaction. It is based on Raman excitation of a three-level atom by a classical field and a quantized field mode. Selectivity appears when one tunes to resonance a specific transition inside a chosen atom-field subspace, while other transitions remain dispersive, as a consequence of the field dependent electronic energy shifts. We show that this scheme can be also employed for reconstructing, in a new and efficient way, the Wigner function of the cavity field state.
authors.affiliation: Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21945-970 Rio de Janeiro, RJ, Brazil.
authors.forename: M F
authors.initials: MF
authors.lastname: Santos
authors.forename: E
authors.initials: E
authors.lastname: Solano
authors.forename: R L
authors.initials: RL
authors.lastname: de Matos Filho