Refining upper bounds of the measurement-induced nonbilocal correlation in the Swapping experiment
ZHANG Ying1,GUO Zhihua2,HE Kan1*
(1 College of Mathematics, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;2 School of Mathematics and Statistics, Shaanxi Normal University, Xian 710119, Shaanxi, China)
Abstract:
Measurement-induced nonbilocal correlation is a measure which quantifies the nonlocality in the entanglement-swapping experiment under local measurements. The measure can be calculated for the pure state, however not for the mixed state. It is obtained that a refined upper bound of the measurement-induced nonbilocal correlation for a special class of mixed states, that is, the marginal state ρBC of every state in this class is a product state ρBC=ρBρC, ρB is non-degenerate and ρC is degenerate.
KeyWords:
measurement-induced nonbilocal correlation;upper bounds of measures;quantum nonlocality;quantum correlations
