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Non-Gaussian State Generation from Linear Elements via Feedback

Source: Phys. Rev. Lett. 103, 203601 (2009); doi:10.1103/PhysRevLett.103.203601

Published 11 November 2009

PACS
  • 42.50.Dv
    Quantum state engineering and measurements (quantum optics)
  • 02.30.Yy
    Control theory
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • 42.50.Ex
    Optical implementations of quantum information processing and transfer
  • YEAR: 2009
PUBLICATION DATA
Publisher:
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Masahiro Yanagisawa
Department of Engineering, The Australian National University, Canberra ACT 0200, Australia
We present a feedback scheme to produce quantum non-Gaussian states from linear optical elements. Instead of traditional additive control methods, we introduce a mutiplicative feedback control and apply it to the deterministic generation of quantum superposition states. The protocol of feedback control is based on quantum nondemolition measurement of a quadrature, multifeedback structure, and Lyapunov stability for feedback design. ©2009 The American Physical Society
History: Received 1 April 2009; published 11 November 2009
Permalink: http://link.aps.org/abstract/PRL/v103/e203601
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