Quantum Communication and Quantum Networking. First International Conference, QuantumComm 2009, Naples, Italy, October 26-30, 2009, Revised Selected Papers

Research Article

Interferometric Technique for Density Matrix Reconstruction by On/Off Detectors

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  • @INPROCEEDINGS{10.1007/978-3-642-11731-2_28,
        author={G. Brida and M. Genovese and M. Gramegna and P. Traina and L. Ciavarella and S. Olivares and M. Paris},
        title={Interferometric Technique for Density Matrix Reconstruction by On/Off Detectors},
        proceedings={Quantum Communication and Quantum Networking. First International Conference, QuantumComm 2009, Naples, Italy, October 26-30, 2009, Revised Selected Papers},
        proceedings_a={QUANTUMCOMM},
        year={2012},
        month={10},
        keywords={Nanomechanical quantum systems and their interaction with nonclassical light},
        doi={10.1007/978-3-642-11731-2_28}
    }
    
  • G. Brida
    M. Genovese
    M. Gramegna
    P. Traina
    L. Ciavarella
    S. Olivares
    M. Paris
    Year: 2012
    Interferometric Technique for Density Matrix Reconstruction by On/Off Detectors
    QUANTUMCOMM
    Springer
    DOI: 10.1007/978-3-642-11731-2_28
G. Brida1, M. Genovese1, M. Gramegna1, P. Traina1,*, L. Ciavarella1, S. Olivares, M. Paris
  • 1: INRIM
*Contact email: p.traina@inrim.it

Abstract

The density matrix provides the most complete description of a quantum optical state and a scheme addressed to its reconstruction for arbitrary sources can be fundamental for several applications, ranging from quantum information to the foundations of quantum mechanics and quantum optics. We demonstrate an innovative state reconstruction technique, which provides the density matrix of a field mode and requires only avalanche photodetectors (coupled with phase modulation with respect to a local oscillator), without any phase or amplitude discrimination power. It represents an alternative of simpler implementation to quantum homodyne tomography.