2000/04/07 by G. Brida, Brida, G., Marco Genovese +6
Computer Science · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Mechanical and Optical Resonators #Optics (physics.optics) #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum Physics (quant-ph) #hep-ex #physics.optics #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/0004033
to be published in Proc. of International Workshop on Optics and Spectroscopy (Hanoi, Vietnam)
arxiv created 2000/04/07 · openalex publication_date 2000/04/07 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report on a test of Bell inequalities using a non-maximally entangled state, which represents an important step in the direction of eliminating the detection loophole. The experiment is based on the creation of a polarisation entangled state via the superposition, by use of an appropriate optics, of the spontaneous fluorescence emitted by two non-linear crystals driven by the same pumping laser. The alignment has profitably taken advantage from the use of an optical amplifier scheme, where a solid state laser is injected into the crystals together with the pumping laser. In principle a very high total quantum efficiency can be reached using this configuration and thus the final version of this experiment can lead to a resolution of the detection loophole, we carefully discuss the conditions which must be satisfied for reaching this result.