Figure 7From: Impact of transmitter imbalances on the security of continuous variables quantum key distributionReal (full line) and naively (dashed line) estimated secret key rates for an imbalanced IQ modulation stage. Shapes and colours indicate the different constellation formats, blue circles indicate the 1024-QAM constellation, orange diamonds indicate the 256-QAM constellation and yellow squares indicate the 64-QAM constellation. The parameters assumed were \(T=01585\), \(\nu =0.9\), \(\epsilon _{\text{thermal}}=0.3\) SNU and \(\epsilon =0.01\) SNU. In the naive scenario the excess noise ϵ is added to the contribution of the deformation of the constellationsBack to article page