Figure 6
From: Optimal architectures for long distance quantum communication
The bubble plot comparing various QR protocols in the three-dimensional parameter space spanned by ηc, εG and t0, for (a) Ltot = 1000 km and (b) Ltot = 10,000 km. The bubble color indicates the associated optimized QR protocol and the bubble diameter is proportional to the cost coefficient. The region plots (c,d) showing the distribution of different optimized QR protocol in the three dimensional parameter space for Ltot = 1000 km and Ltot = 10,000 km respectively. The region plot (c) contains a yellow region of second generation with encoding, which can be verified in a bubble plot with a finer discretization of εG.
