All-Versus-Nothing Violation of Local Realism for Two Entangled Photons

Details All-Versus-Nothing Violation of Local Realism for Two Entangled Photons All-Versus-Nothing Violation of Local Realism for Two Entangled Photons

2002-11-13

arxiv.org/abs/quant-ph/0211075v2

Phys. Rev. Lett. 90, 160408 (2003)

Physics

Quantum Physics

4 pages, 2 figs / published version, but with typos corrected [e.g., Fig. 2(f)], and with comments on quantum erasure added

Scientific paper

10.1103/PhysRevLett.90.160408

It is shown that the Greenberger-Horne-Zeilinger theorem can be generalized to the case with only two entangled particles. The reasoning makes use of two photons which are maximally entangled both in polarization and in spatial degrees of freedom. In contrast to Cabello's argument of "all versus nothing" nonlocality with four photons [Phys. Rev. Lett. 87, 010403 (2001)], our proposal to test the theorem can be implemented with linear optics and thus is well within the reach of current experimental technology.

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