Characterization of bipartite states using a single homodyne detector

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.

7 pages, 1 figure

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• Experimental analysis of decoherence of quantumness in a continuous variables bi-partite entangled system
• An effective method to estimate multidimensional Gaussian states
• Full quantum state reconstruction of symmetric two-mode squeezed thermal states via spectral homodyne detection
• Continuous-Variable Entangled States of Light carrying Orbital Angular Momentum
• Amendable Gaussian channels:restoring entanglement via a unitary filter
• Different operational meanings of continuous variable Gaussian entanglement criteria and Bell inequalities
• Multi-mode Gaussian State Analysis with Total Photon Counting
• Quantification of Continuous Variable Entanglement with only Two Types of Simple Measurements
• Complete State Reconstruction of a Two-Mode Gaussian State via Local Operations and Classical Communication
• Experimental pre-assessing entanglement in Gaussian states mixing
• Multi-mode Gaussian State Analysis with one Bounded Photon Counter