Bell's inequality test: more ideal than ever

@article{Aspect1999BellsIT,
  title={Bell's inequality test: more ideal than ever},
  author={A. Aspect},
  journal={Nature},
  year={1999},
  volume={398},
  pages={189-190}
}
The experimental violation of Bell's inequalities confirms that a pair of entangled photons separated by hundreds of metres must be considered a single non-separable object — it is impossible to assign local physical reality to each photon. 

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