| Grant number: | 10/52282-1 |
| Support type: | Regular Research Grants |
| Duration: | January 01, 2011 - January 31, 2013 |
| Field of knowledge: | Physical Sciences and Mathematics - Physics - Condensed Matter Physics |
| Cooperation agreement: | CNRS |
| Principal researcher: | Marcelo Martinelli |
| Grantee: | Marcelo Martinelli |
| Principal researcher abroad: | Claude Fabre |
| Institution abroad: | Université Pierre et Marie Curie (Paris 6), France |
| Home Institution: | Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil |
| Associated research grant: | 09/52157-5 - Teleportation of quantum information between different colors, AP.R |
Abstract
In quantum optics, the measurements involving quadratures of the field generally use the beat signal involving the central carrier of the field and the noise contained in the two sidebands. This characteristic feature of the detection implies a limitation to the direct application of entanglement tests proposed in the theory, involving covariances among single field modes. We plan to investigate this problem in detail, and to make direct observations of its implications in Optical Parametric Oscillators, both above and below threshold. The understanding of this phenomenon is important for an optimized implementation of quantum information processing protocols, as is the case of teleportation. (AU)
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