Performance optimization for quantum key distribution in lossy channel using entangled photons
Yang Yu1, Xu Luping1, †, Yan Bo1, Zhang Hongyang1, Shen Yanghe2
The projection of Fig. 6 on the M–η plane when looking up along the negative half axis of the QBER axis. The red region indicates that M unentangled photons can bring the lowest QBER compared to the other two methods. The blue region represents that the lowest QBER comes from the grouping-entangled photons. The yellow region is where the lowest QBER is obtained through M fully entangled photons.
