Feedback generation of quantum Fock states by discrete QND measures
arXiv:0903.0996 · doi:10.1109/CDC.2009.5399839
Abstract
A feedback scheme for preparation of photon number states in a microwave cavity is proposed. Quantum Non Demolition (QND) measurement of the cavity field provides information on its actual state. The control consists in injecting into the cavity mode a microwave pulse adjusted to maximize the population of the desired target photon number. In the ideal case (perfect cavity and measures), we present the feedback scheme and its detailed convergence proof through stochastic Lyapunov techniques based on super-martingales and other probabilistic arguments. Quantum Monte-Carlo simulations performed with experimental parameters illustrate convergence and robustness of such feedback scheme.
submitted, update version with feedback law of arXiv:0905.0114 [quant-ph]
References in corpus (5)
- Quantum jumps of light recording the birth and death of a photon in a cavity
- Reconstruction of non-classical cavity field states with snapshots of their decoherence
- Progressive field-state collapse and quantum non-demolition photon counting
- Quantum feedback by discrete quantum non-demolition measurements: towards on-demand generation of photon-number states
- A Deterministic and Nondestructively-Verifiable Photon Number Source