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MiS Preprint
56/2017
Maximal violation of Bell inequalities under local filtering
Ming Li, Hui-Hui Qin, Jing Wang, Shao-Ming Fei and Chang-Pu Sun
Abstract
We investigate the behavior of the maximal violations of the CHSH inequality and V$\grave{e}$rtesi's inequality under the local filtering operations.
An analytical method has been presented for general two-qubit systems to compute the maximal violation of the CHSH inequality and the lower bound of the maximal violation of V$\acute{e}$rtesi's inequality over the local filtering operations. We show by examples that there exist quantum states whose non-locality can be revealed after local filtering operation by the V$\acute{e}$rtesi's inequality instead of the CHSH inequality.
