title: Proposal for a loophole-free Bell test using homodyne detection.
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 squeezed light and a homodyne efficiency around 95%. A detailed feasibility analysis, based upon the recent experimental generation of single-mode non-Gaussian states, suggests that this method opens a promising avenue towards a complete experimental Bell test.
authors.affiliation: QUIC, Ecole Polytechnique, CP 165, Université Libre de Bruxelles, 1050 Bruxelles, Belgium.
authors.forename: R
authors.initials: R
authors.lastname: García-Patrón
authors.forename: J
authors.initials: J
authors.lastname: Fiurásek
authors.forename: N J
authors.initials: NJ
authors.lastname: Cerf
authors.forename: J
authors.initials: J
authors.lastname: Wenger
authors.forename: R
authors.initials: R
authors.lastname: Tualle-Brouri
authors.forename: Ph
authors.initials: P
authors.lastname: Grangier