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Conference on Lasers and Electro-Optics

Conditional preparation of a quantum state in the continuous variable regime: experimental generation of non classical states from twin beams

Julien Laurat, T. Coudreau, Nicolas Treps, Agnès Maître, Claude Fabre

Published Jan 1, 2004• 0 citations
Publisher

Abstract

We report the first experimental demonstration of conditional preparation in the continuous variable regime. Starting from intensity quantum correlated "twin beams" generated by an OPO, we obtain a sub-poissonian state displaying 4.5 dB noise reduction.
DOI
10.1364/iqec.2004.imk5

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We report the first experimental demonstration of conditional preparation of a nonclassical state of light in the continuous variable regime. Starting from a nondegenerate optical parametric oscillator which generates above threshold quantum intensity correlated signal and idler "twin beams," we keep the recorded values of the signal intensity only when the idler intensity falls inside a band narrower than its standard deviation. By this very simple technique, we generate a sub-Poissonian state 4.4 dB (64%) below shot noise from twin beams exhibiting 7.5 dB (82%) of noise reduction in the intensity difference.
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