Conditional preparation of a non-classical state in the continuous variable regime: theoretical study

Details Conditional preparation of a non-classical state in the continuous variable regime: theoretical study Conditional preparation of a non-classical state in the continuous variable regime: theoretical study

2003-11-30

arxiv.org/abs/quant-ph/0312007v1

Phys. Rev. A 69 (2004) 033808

Physics

Quantum Physics

Submitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.69.033808

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 non-degenerate OPO 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.

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