2003/11/30 by Julien Laurat, T. Coudreau, Thomas Coudreau +4 · 1 citation
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum optics and atomic interactions #Spectroscopy and Quantum Chemical Studies #quant-ph
paper · pdf · doi:10.1103/physreva.69.033808
published as Phys. Rev. A 69 (2004) 033808 · Submitted to Phys. Rev. A
arxiv created 2003/11/30 · openalex publication_date 2004/03/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.