Nonlocality without inequalities for maximally entangled states
Abstract
A proof of Bell's theorem without inequalities valid for maximally entangled states of two qubits is presented. The proof requires two copies of the maximally entangled state, but it exhibits a similar logical structure to Hardy's proof [Phys. Rev. Lett. {\bf 71}, 1665 (1993)]. Moreover, it shows a higher contradiction between quantum mechanics and local realism than Hardy's proof, and it leads to a ``single shot'' test of Bell's theorem.Keywords
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