Full characterization of Gaussian bipartite entangled states by a single homodyne detector.

  title={Full characterization of Gaussian bipartite entangled states by a single homodyne detector.},
  author={Virginia D'Auria and Stefano Fornaro and Alberto Porzio and S. Solimeno and Stefano Olivares and Matteo G. A. Paris},
  journal={Physical review letters},
  volume={102 2},
We present the full experimental reconstruction of Gaussian entangled states generated by a type-II optical parametric oscillator below threshold. Our scheme provides the entire covariance matrix using a single homodyne detector and allows for the complete characterization of bipartite Gaussian states, including the evaluation of purity, entanglement, and nonclassical photon correlations, without a priori assumptions on the state under investigation. Our results show that single homodyne… 

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