Phys. Rev. Lett. 95, 210401 (2005) [4 pages]Stronger Two-Observer All-Versus-Nothing Violation of Local RealismReceived 27 July 2005; published 18 November 2005 We introduce a two-observer all-versus-nothing proof of Bell’s theorem which reduces the number of required quantum predictions from 9 [ A. Cabello Phys. Rev. Lett. 87 010403 (2001) Z.-B. Chen et al. Phys. Rev. Lett. 90 160408 (2003)] to 4, provides a greater amount of evidence against local realism, reduces the detection efficiency requirements for a conclusive experimental test of Bell’s theorem, and leads to a Bell inequality which resembles Mermin’s inequality for three observers [ N. D. Mermin Phys. Rev. Lett. 65 1838 (1990)] but requires only two observers. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.210401
DOI:
10.1103/PhysRevLett.95.210401
PACS:
03.65.Ud, 03.67.Pp, 42.50.Xa
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