Quantum feedback by discrete quantum nondemolition measurements: Towards on-demand generation of photon-number states - Archive ouverte HAL Access content directly
Journal Articles Physical Review A : Atomic, molecular, and optical physics [1990-2015] Year : 2009

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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hal-00476111 , version 1 (23-04-2010)

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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 : Atomic, molecular, and optical physics [1990-2015], 2009, pp.013805. ⟨10.1103/PhysRevA.80.013805⟩. ⟨hal-00476111⟩
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