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Figure 2 | EPJ Quantum Technology

Figure 2

From: Impact of receiver imbalances on the security of continuous variables quantum key distribution

Figure 2

Evolution of (a) the estimated channel transmission, given by (20), (b) Bob’s shot noise estimate, given by (21), (c) the estimated excess noise, given by (22), and (d) the estimated key rate, given by (23), as a function of Bob’s beam-splitter transmission coefficient. We have used \({T=0.1}\), \({g_{\text{TIA}}=10^{4}}\text{ V/A}\), \({\varepsilon _{\text{th}}=1.44\times 10^{-4}}\text{ Vrms}\), \(|{\alpha _{\text{A}}|^{2}=1.25\times 10^{8}}\text{ s}^{-1}\), \({|\alpha _{\text{B}}|^{2}=1.56\times 10^{17}}\text{ s}^{-1}\), \({T_{s}=4}\text{ ns}\), \({dt=31.25}\text{ ps}\), \({\eta _{\text{d}_{1}}=\eta _{\text{d}_{2}}=0.7}\) and \({\text{RIN}^{\text{A}}_{\Delta f}=\text{RIN}^{\text{B}}_{\Delta f}=3\times 10^{-15}}\text{ Hz} ^{-1}\)

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