Entanglement of two-mode Gaussian states: characterization and experimental production and manipulation

Julien Laurat (1) , Gaëlle Keller (1) , Jose-Augusto Oliveira-Huguenin (1) , Claude Fabre (1) , Thomas Coudreau (1, 2) , Alessio Serafini (3, 4) , Gerardo Adesso (3) , Fabrizio Illuminati (3)

1 LKB (Jussieu) - Laboratoire Kastler Brossel
2 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
3 Dipartimento di Fisica ``E. R. Caianiello''
4 Department of Physics and Astronomy [UCL London]

A powerful theoretical structure has emerged in recent years on the characterization and quantification of entanglement in continuous-variable systems. After reviewing this framework, we will illustrate it with an original set-up based on a type-II OPO with adjustable mode coupling. Experimental results allow a direct verification of many theoretical predictions and provide a sharp insight into the general properties of two-mode Gaussian states and entanglement resource manipulation.

Domaines: Physique Quantique [quant-ph]

Julien Laurat, Gaëlle Keller, Jose-Augusto Oliveira-Huguenin, Claude Fabre, Thomas Coudreau, et al.. Entanglement of two-mode Gaussian states: characterization and experimental production and manipulation. Journal of Optics B Quantum and Semiclassical Optics, 2005, 7, pp.S577. ⟨10.1088/1464-4266/7/12/021⟩. ⟨hal-00005867v2⟩