Performance optimization for quantum key distribution in lossy channel using entangled photons

Yang Yu¹, Xu Luping^{1, †}, Yan Bo¹, Zhang Hongyang¹, Shen Yanghe²

(color online) The effects of partially entangled photons on the QBER with the number of photons (a) M = 4, (b) M = 8, (c) M = 16, (d) M = 32, together with a single photon scheme (black solid line).