Three-party entanglement from positronium

Details Three-party entanglement from positronium Three-party entanglement from positronium

2000-07-20

arxiv.org/abs/quant-ph/0007080v1

Phys.Rev. A63 (2001) 042107

Physics

Quantum Physics

REVTEX, 13 pages, 3 figures

Scientific paper

10.1103/PhysRevA.63.042107

The decay of ortho-positronium into three photons produces a physical realization of a pure state with three-party entanglement. Its quantum correlations are analyzed using recent results on quantum information theory, looking for the final state which has the maximal amount of GHZ-like correlations. This state allows for a statistical dismissal of local realism stronger than the one obtained using any entangled state of two spin one-half particles.

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