Violation of Clauser-Horne-Shimony-Holt inequality for states resulting from entanglement swapping (1007.4775v2)

Abstract: We consider violation of CHSH inequality for states before and after entanglement swapping. We present a pair of initial states which do not violate CHSH inequality however the final state violates CHSH inequality for some results of Bell measurements performed in order to swap entanglement.