Characterization of bipartite states using a single homodyne detector

2005/09/26 by Virginia D’Auria, Virginia D'Auria, Alberto Porzio +4 · 1 citation
Computer Science · Physics and Astronomy · #Beam splitter #Bipartite graph #Characterization (materials science) #Cold Atom Physics and Bose-Einstein Condensates #Covariance #Covariance matrix #Detector #Direct-conversion receiver #Homodyne detection #Mechanical and Optical Resonators #Quantum Information and Cryptography #quant-ph

paper · pdf · doi:10.1088/1464-4266/7/12/044

published as J. Opt. B: Quantum and Semiclass. Opt. 7, S750 (2005) · 7 pages, 1 figure

arxiv created 2005/09/26 · openalex publication_date 2005/11/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We suggest a scheme to reconstruct the covariance matrix of a two-mode state using a single homodyne detector plus a polarizing beam splitter and a polarization rotator. It can be used to fully characterize bipartite Gaussian states and to extract relevant informations on generic states.

Citations

• Purity of Gaussian states: Measurement schemes and time evolution in noisy channels
• Entanglement and purity of two-mode Gaussian states in noisy channels
• Quantifying decoherence in continuous variable systems
• Unconditional Quantum Teleportation

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• Amendable Gaussian channels: Restoring entanglement via a unitary filter