Fig. 3
From: Complete elimination of information leakage in continuous-variable quantum communication channels
Numerical calculation of leakage elimination. a Contour plot of the Holevo information bound in terms of signal modulation and transmittance in the quantum channel, with no excess noise and 0.5 SNU squeezing, corresponding to −3 dB. The white line indicates the minimum information leakage. b Contour plot of the Holevo information bound in terms of signal modulation and transmittance loss in the quantum channel, with excess noise \(\epsilon = 0.01\) SNU and 0.5 SNU squeezing, corresponding to −3 dB. The white line indicates the minimum, but non-zero, information leakage
