2016/12/31 by Su-Yong Lee, Su‐Yong Lee, Jiyong Park +2 · 12 citations
Computer Science · Mathematics · Physics and Astronomy · #Bipartite graph #CHSH inequality #Cold Atom Physics and Bose-Einstein Condensates #Discrete mathematics #Homodyne detection #Mathematics #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum nonlocality #Robustness (evolution) #Unitary state #quant-ph
paper · pdf · doi:10.1103/physreva.95.012134
published in Physical Review A 95(1) (American Physical Society) · 7+ pages, 7 figures, 1 table, close to published version
openalex publication_date 2017/01/26 · arxiv created 2017/01/27 · arxiv updated 2017/01/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate quantum nonlocality of a single-photon entangled state under feasible measurement techniques consisting of on-off and homodyne detections along with unitary operations of displacement and squeezing. We test for a potential violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality, in which each of the bipartite party has a freedom to choose between two measurement settings, with each measurement yielding a binary outcome. We find that single-photon quantum nonlocality can be detected when two or less of the four total measurements are carried out by homodyne detection. The largest violation of the CHSH inequality is obtained when all four measurements are squeezed-and-displaced on-off detections. We test the robustness of violations against imperfections in on-off detectors and single-photon sources, finding that the squeezed-and-displaced measurement schemes perform better than the displacement-only measurement schemes.