Practical security of continuous-variable quantum key distribution under finite-dimensional effect of multi-dimensional reconciliation

Zhou Yingming¹, Jiang Xue-Qin³, Liu Weiqi², Wang Tao¹, Huang Peng^{1, †}, Zeng Guihua^{1, 3, ‡}

(color online) Channel capacity with respect to the SNR. The red dash line represents the Gaussian channel capacity. The black solid line represents the BIAWGN channel capacity. The blue dotted line represents the octonian channel capacity. The octonian channel capacity is lower than the Gaussian channel capacity in the low SNR scenario.