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Macroscopic quantum fluctuations in noise-sustained optical patterns

Zambrini, Roberta and Barnett, Stephen M. and Colet, Pere and San Miguel, Maxi (2002) Macroscopic quantum fluctuations in noise-sustained optical patterns. Physical Review A, 65 (2). 023813-1. ISSN 1050-2947

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    Abstract

    We investigate quantum effects in pattern formation for a degenerate optical parametric oscillator with walk-off. This device has a convective regime in which macroscopic patterns are both initiated and sustained by quantum noise. Familiar methods based on linearization about a pseudoclassical field fail in this regime and new approaches are required. We employ a method in which the pump field is treated as a c-number variable but is driven by the c-number representation of the quantum subharmonic signal field. This allows us to include the effects of the fluctuations in the signal on the pump, which in turn act back on the signal. We find that the nonclassical effects, in the form of squeezing, survive just above the threshold of the convective regime. Further, above threshold, the macroscopic quantum noise suppresses these effects.

    Item type: Article
    ID code: 6152
    Keywords: physics, optics, quantum, optical patterns, quantum fluctuations, Optics. Light, Atomic and Molecular Physics, and Optics
    Subjects: Science > Physics > Optics. Light
    Department: Faculty of Science > Physics
    Related URLs:
    Depositing user: Miss Darcy Spiller
    Date Deposited: 16 May 2008
    Last modified: 05 Sep 2014 13:19
    URI: http://strathprints.strath.ac.uk/id/eprint/6152

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