Experimental many-pairs nonlocality

Poh, Hou Shun and Cerè, Alessandro and Bancal, Jean-Daniel and Cai, Yu and Sangouard, Nicolas and Scarani, Valerio and Kurtsiefer, Christian. (2017) Experimental many-pairs nonlocality. Physical Review A, 96 (2). 022101.

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Official URL: http://edoc.unibas.ch/58181/

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Collective measurements on large quantum systems together with a majority voting strategy can lead to a violation of the Clauser-Horne-Shimony-Holt Bell inequality. In the presence of many entangled pairs, this violation decreases quickly with the number of pairs and vanishes for some critical pair number that is a function of the noise present in the system. Here we show that a different binning strategy can lead to a more substantial Bell violation when the noise is sufficiently small. Given the relation between the critical pair number and the source noise, we then present an experiment where the critical pair number is used to quantify the quality of a high visibility photon pair source. Our results demonstrate nonlocal correlations using collective measurements operating on clusters of more than 40 photon pairs.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Quantum Physics (Sangouard)
UniBasel Contributors:Sangouard, Nicolas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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edoc DOI:
Last Modified:08 Jan 2018 09:52
Deposited On:08 Jan 2018 09:41

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