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Phys. Rev. A 77, 032339 (2008) [4 pages]

Experimental test of nonlocal realism using a fiber-based source of polarization-entangled photon pairs

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M. D. Eisaman1, E. A. Goldschmidt1, J. Chen2, J. Fan1,*, and A. Migdall1
1Optical Technology Division, National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 8441, Gaithersburg. Maryland 20899-8441, USA and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, USA
2Institute of Computational Mathematics and Applied Physics, P.O. Box 8009 (28), 100088 Beijing, People’s Republic of China

Received 14 September 2007; published 25 March 2008

We describe an experimental test of local realistic and nonlocal realistic theories using polarization-entangled two-photon singlet states created using a fiber-based polarization Sagnac interferometer. We show a violation of Bell’s inequality in the Clauser-Horne-Shimony-Holt form by 15 standard deviations, thus excluding local hidden-variable theories, and a violation of a Leggett-type nonlocal hidden-variable inequality by more than three standard deviations, thus excluding a class of nonlocal hidden-variable theories.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.77.032339
DOI:
10.1103/PhysRevA.77.032339
PACS:
03.67.Mn, 03.65.Ud, 42.65.Lm, 42.50.Dv

*jfan@nist.gov