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Quantum feedback by discrete quantum nondemolition measurements: Towards on-demand generation of photon-number states

Abstract : We propose a quantum feedback scheme for the preparation and protection of photon-number states of light trapped in a high-Q microwave cavity. A quantum nondemolition measurement of the cavity field provides information on the photon-number distribution. The feedback loop is closed by injecting into the cavity a coherent pulse adjusted to increase the probability of the target photon number. The efficiency and reliability of the closed-loop state stabilization is assessed by quantum Monte Carlo simulations. We show that, in realistic experimental conditions, the Fock states are efficiently produced and protected against decoherence.
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Submitted on : Friday, April 23, 2010 - 4:37:18 PM
Last modification on : Thursday, July 1, 2021 - 5:33:04 PM
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Igor Dotsenko, Mazyar Mirrahimi, Michel Brune, Serge Haroche, Jean-Michel Raimond, et al.. Quantum feedback by discrete quantum nondemolition measurements: Towards on-demand generation of photon-number states. Physical Review A, American Physical Society, 2009, pp.013805. ⟨10.1103/PhysRevA.80.013805⟩. ⟨hal-00476111⟩

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