Experimental Generation of Large Quadrature EPR Entanglement with a Self-Phase-Locked Type II OPO Below Threshold - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2005

Experimental Generation of Large Quadrature EPR Entanglement with a Self-Phase-Locked Type II OPO Below Threshold

Julien Laurat
Gaëlle Keller
  • Fonction : Auteur
  • PersonId : 828863
Nicolas Treps
  • Fonction : Auteur
  • PersonId : 828406
Claude Fabre
  • Fonction : Auteur
  • PersonId : 828407

Résumé

We study theoretically and experimentally the quantum properties of a type II frequency degenerate optical parametric oscillator below threshold with a quarter-wave plate inserted inside the cavity which induces a linear coupling between the orthogonally polarized signal and idler fields. This original device provides a good insight into general properties of two-mode gaussian states, illustrated in terms of covariance matrix. We report on the experimental generation of two-mode squeezed vacuum on non-orthogonal quadratures depending on the plate angle. After a simple operation, the entanglement is maximized and put into standard form, \textit{i.e.} quantum correlations and anti-correlations on orthogonal quadratures. A half-sum of squeezed variances as low as $0.33 \pm 0.02$, well below the unit limit for inseparability, is obtained and the entanglement measured by the entropy of formation.
Fichier principal
Vignette du fichier
EPR_laurat.pdf (357.48 Ko) Télécharger le fichier
Loading...

Dates et versions

hal-00003051 , version 1 (11-10-2004)

Identifiants

Citer

Julien Laurat, Thomas Coudreau, Gaëlle Keller, Nicolas Treps, Claude Fabre. Experimental Generation of Large Quadrature EPR Entanglement with a Self-Phase-Locked Type II OPO Below Threshold. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2005, 71, pp.022313. ⟨hal-00003051⟩
74 Consultations
52 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More