A Primer on Underwater Quantum Key Distribution

Figure 10

Experimental and theoretical values of underwater SKGR (vertical axis: logarithmic scale) as a function of distance (horizontal axis), obtained with the BB84 protocol. The values are from the following papers: the Hufnagel_exp and Hufnagel_theo series from [106]; the Li and Li_decoy_state series from [48]; the Zao_exp and Zao_theo from [109]; the Lanzagorta series from [98]; the Yu series from [111]; the Hu series from [110]; the Shi series from [100]; the Zhao series from [29]; the Kebapci series from [113]. Red symbols indicate experimental results, and blue symbols indicate theoretical results, or extrapolated results from experimental data. The Hufnagel_exp, Hufnagel_theo, and Li_decoy_state series have been obtained with the support of the decoy-state protocol.