Bell's theorem without inequalities and without alignments

Details Bell's theorem without inequalities and without alignments Bell's theorem without inequalities and without alignments

2003-03-12

arxiv.org/abs/quant-ph/0303076v4

Phys. Rev. Lett. 91 (2003) 230403

Physics

Quantum Physics

REVTeX4, 4 pages

Scientific paper

10.1103/PhysRevLett.91.230403

A proof of Bell's theorem without inequalities is presented which exhibits three remarkable properties: (a) reduced local states are immune to collective decoherence; (b) distant local setups do not need to be aligned, since the required perfect correlations are achieved for any local rotation of the local setups; (c) local measurements require only individual measurements on the qubits. Indeed, it is shown that this proof is essentially the only one which fulfils (a), (b), and (c).

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