How to measure squeezing and entanglement of Gaussian states without homodyning
Jaromir Fiurasek, Nicolas J. Cerf
Abstract
We propose a scheme for measuring the squeezing, purity, and entanglement of Gaussian states of light that does not require homodyne detection. The suggested setup only needs beam splitters and single-photon detectors. Two-mode entanglement can be detected from coincidences between photodetectors placed on the two beams.
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