title: Field locked to a Fock state by quantum feedback with single photon corrections.
abstract: Fock states with photon numbers n up to 7 are prepared on demand in a microwave superconducting cavity by a quantum feedback procedure that reverses decoherence-induced quantum jumps. Circular Rydberg atoms are used as quantum nondemolition sensors or as single-photon emitter or absorber actuators. The quantum nature of these actuators matches the correction of single-photon quantum jumps due to relaxation. The flexibility of this method is suited to the generation of arbitrary sequences of Fock states.
authors.affiliation: Laboratoire Kastler-Brossel, ENS, UPMC-Paris 6, CNRS, 24 rue Lhomond, 75005 Paris, France.
authors.forename: X
authors.initials: X
authors.lastname: Zhou
authors.forename: I
authors.initials: I
authors.lastname: Dotsenko
authors.forename: B
authors.initials: B
authors.lastname: Peaudecerf
authors.forename: T
authors.initials: T
authors.lastname: Rybarczyk
authors.forename: C
authors.initials: C
authors.lastname: Sayrin
authors.forename: S
authors.initials: S
authors.lastname: Gleyzes
authors.forename: J M
authors.initials: JM
authors.lastname: Raimond
authors.forename: M
authors.initials: M
authors.lastname: Brune
authors.forename: S
authors.initials: S
authors.lastname: Haroche