Comment on "Quantum nonlocality for a three-particle nonmaximally entangled state without inequalities"

Details Comment on "Quantum nonlocality for a three-particle nonmaximally entangled state without inequalities" Comment on "Quantum nonlocality for a three-particle nonmaximally entangled state without inequalities"

2003-12-05

arxiv.org/abs/quant-ph/0312046v1

Physics

Quantum Physics

REVTeX4, 2 pages

Scientific paper

In a recent Brief Report, Zheng [S-B. Zheng, PRA 66, 014103 (2002)] has given a proof of nonlocality without using inequalities for three spin-1/2 particles in the nonmaximally entangled state |psi> = cos\theta |+++> + i sin\theta |-->. Here we show that Zheng's proof is not correct. Indeed it is the case that, for the experiment considered by Zheng, the only state that admits a nonlocality proof without inequalities is the maximally entangled state.

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