Abstract
We propose a feasible optical setup allowing for a loophole‐free Bell test with efficient homodyne detection. A non‐Gaussian entangled state is generated from a two‐mode squeezed vacuum by subtracting a single photon from each mode, using beam splitters and standard low‐efficiency single‐photon detectors. A Bell violation exceeding 1% is achievable with 6 dB of squeezing, a photodetector efficiency around 10%, and an homodyne efficiency around 95%. A feasibility analysis, based upon the recent generation of single‐mode non‐Gaussian states via photon subtraction, suggests that this method opens a promising avenue towards a complete experimental Bell test.
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