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arXiv:quant-ph/0312007 · Physical Review A

Conditional preparation of a nonclassical state in the continuous-variable regime: Theoretical study

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

Published Mar 16, 2004• 24 citations

Abstract

We study the characteristics of the quantum state of light produced by a conditional preparation protocol totally performed in the continuous-variable regime. It relies on conditional measurements on quantum intensity correlated bright twin beams emitted by a nondegenerate optical parametric oscillator above threshold. Analytical expressions as well as computer simulations of the selected state properties and preparation efficiency are developed and show that a sub-Poissonian state can be produced by this technique. Projection onto a given trigger value is studied and then extended to a finite band. The continuous-variable regime offers the unique possibility to improve dramatically the preparation efficiency by choosing multiple selection bands and thus to generate a great number of sub-Poissonian states in parallel.

DOI: 10.1103/physreva.69.033808

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