Another loophole for the Bell inequalities

Karl Otto Greulich

doi:10.1117/12.825893

10 September 2009 Another loophole for the Bell inequalities

Karl Otto Greulich

Proceedings Volume 7421, The Nature of Light: What are Photons? III; 74210S (2009) https://doi.org/10.1117/12.825893
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

Detecting non-locality requires almost ideal experimental conditions - ideal sources for entangled photon pairs and ideal detectors. Deviations from this ideal situation may critically hamper interpretations of experiments attempting to prove non-locality. Of two major known loopholes, the detector loophole is not yet unequivocally closed. Now another loophole emerges: When in such experiments down converting crystals with lasers as primary sources are used, exceeding threshold values in the Bell inequalities, i.e. their violation, can be caused by so far not fully recognized problems in the generation and detection of photon pairs. Taken together, nonlocality is still not yet unequivocally proven.

Citation Download Citation

Karl Otto Greulich "Another loophole for the Bell inequalities", Proc. SPIE 7421, The Nature of Light: What are Photons? III, 74210S (10 September 2009); https://doi.org/10.1117/12.825893

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