Quantum nonlocality in two three-level systems

  title={Quantum nonlocality in two three-level systems},
  author={Antonio Ac{\'i}n and Thomas Durt and Nicolas Gisin and Jos{\'e} Ignacio Latorre},
  journal={Physical Review A},
Recently a new Bell inequality has been introduced (CGLMP,KKCZO) that is strongly resistant to noise for maximally entangled states of two d-dimensional quantum systems. We prove that a larger violation, or equivalently a stronger resistance to noise, is found for a non-maximally entangled state. It is shown that the resistance to noise is not a good measure of non-locality and we introduce some other possible measures. The non-maximally entangled state turns out to be more robust also for… 

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