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Efficient Optical Quantum State Engineering

Source: Phys. Rev. Lett. 103, 163602 (2009); doi:10.1103/PhysRevLett.103.163602

Published 14 October 2009

PACS
  • 42.50.Dv
    Quantum state engineering and measurements (quantum optics)
  • 03.67.Bg
    Entanglement production and manipulation (quantum information)
  • 42.65.Lm
    Parametric down conversion and production of entangled photons
  • YEAR: 2009
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PUBLICATION DATA
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Kevin T. McCusker and Paul G. Kwiat
University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
We discuss a novel method of efficiently producing multiphoton states using repeated spontaneous parametric down-conversion. Specifically, by attempting down-conversion several times, we can pseudodeterministically add photons to a mode, producing various several-photon states, e.g., Fock states and N00N states (number-path entangled states of the form |NA,0B>+|0A,NB>). This scheme is exponentially more efficient than previous proposals; we discuss expected performance and experimental limitations. ©2009 The American Physical Society
History: Received 29 June 2009; published 14 October 2009
Permalink: http://link.aps.org/abstract/PRL/v103/e163602

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