Detection-loophole-free test of quantum nonlocality, and applications

B. G. Christensen, K. T. McCusker, J. B. Altepeter, B. Calkins, T. Gerrits, A. E. Lita, A. Miller, L. K. Shalm, Y. Zhang, S. W. Nam, N. Brunner, C. C.W. Lim, N. Gisin, P. G. Kwiat

Research output: Contribution to journalArticlepeer-review


We present a source of entangled photons that violates a Bell inequality free of the "fair-sampling" assumption, by over 7 standard deviations. This violation is the first reported experiment with photons to close the detection loophole, and we demonstrate enough "efficiency" overhead to eventually perform a fully loophole-free test of local realism. The entanglement quality is verified by maximally violating additional Bell tests, testing the upper limit of quantum correlations. Finally, we use the source to generate "device-independent" private quantum random numbers at rates over 4 orders of magnitude beyond previous experiments.

Original languageEnglish (US)
Article number130406
JournalPhysical review letters
Issue number13
StatePublished - Sep 26 2013

ASJC Scopus subject areas

  • General Physics and Astronomy


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