All-Versus-Nothing Violation of Local Realism for Two Entangled Photons
Zeng-Bing Chen, Jian-Wei Pan, Yong-De Zhang, Caslav Brukner, Anton Zeilinger
Abstract
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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