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We investigate quantum nonlocality of a single-photon entangled state underfeasible measurement techniques consisting of on-off and homodyne detectionsalong with unitary operations of displacement and squeezing. We test for apotential violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality, inwhich each of the bipartite party has a freedom to choose between 2 measurementsettings, each measurement yielding a binary outcome. We find thatsingle-photon quantum nonlocality can be detected when two or less of the 4total measurements are carried out by homodyne detection. The largest violationof the CHSH inequality is obtained when all four measurements aresqueezed-and-displaced on-off detections. We test robustness of violationsagainst imperfections in on-off detectors and single-photon sources, findingthat the squeezed-and-displaced measurement schemes perform better than thedisplacement-only measurement schemes.

Single-photon quantum nonlocality: Violation of the Clauser-Horne-Shimony-Holt inequality using feasible measurement setups