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Full Characterization of a Three-Photon Greenberger-Horne-Zeilinger State Using Quantum State Tomography
We have performed the first experimental tomographic reconstruction of a three-photon polarization state. Quantum state tomography is a powerful tool for fully describing the density matrix of a quantum system. We measured 64 three-photon polarization correlations and used a ``maximum-likelihood'' reconstruction method to reconstruct the Greenberger-Horne-Zeilinger state. The entanglement class …