2008/10/11 by Kim Fook Lee, Lee, Kim Fook
Engineering · Physics and Astronomy · #Advanced Photonic Communication Systems #FOS: Physical sciences #Optical Network Technologies #Photonic and Optical Devices #Quantum Physics (quant-ph) #quant-ph
paper · pdf · doi:10.48550/arxiv.0810.1998
12 pages, 5 figures
arxiv created 2008/10/11 · openalex publication_date 2008/10/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Polarization correlations of two distant observers are observed by using coherent light fields based on Stapp's formulation of nonlocality. Using a 50/50 beam splitter transformation, a vertically polarized coherent light field is found to be entangled with a horizontally polarized coherent noise field. The superposed light fields at each output port of the beam splitter are sent to two distant observers, where the fields are interfered and manipulated at each observer by using a quarter wave plate and an analyzer. The interference signal contains information of the projection angle of the analyzer, which is hidden by the phase noises. The nonlocal correlations between the projection angles of two distant observers are established by analyzing their data through analog signal multiplication without any post-selection technique. This scheme can be used to implement Ekert's protocol for quantum key distribution.