Strict detector-efficiency bounds for n-site Clauser-Horne inequalities

@article{Larsson2001StrictDB,
  title={Strict detector-efficiency bounds for n-site Clauser-Horne inequalities},
  author={Jan-{\AA}ke Larsson and Jason Semitecolos},
  journal={Physical Review A},
  year={2001},
  volume={63},
  pages={022117-1-022117-5}
}
An analysis of detector-efficiency in many-site Clauser-Horne inequalities is presented for the case of perfect visibility. It is shown that there is a violation of the presented n-site Clauser-Hor ... 
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d): to obtain equality in (8a-c) we have to use Ai = Bi (no rotation), and then P (B1 = B2 = 1) = P (A1 = 1), which has to be 0 to fulfill (8d)