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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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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
Depositing user: Miss Darcy Spiller
Date Deposited: 16 May 2008
Last modified: 24 Jul 2015 12:48
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