We characterize violation of CHSH inequalities for mixed two-qubit states by their mixedness and entanglement. The class of states that have maximum degree of CHSH violation for a given linear entropy is also constructed.
@article{arxiv.quant-ph/0506252,
title = {CHSH violation and entropy - concurrence plane},
author = {L. Derkacz and L. Jakobczyk},
journal= {arXiv preprint arXiv:quant-ph/0506252},
year = {2009}
}