Fig. 2: Expected number of surviving Bell pairs per shot versus inter-repeater distance in a quantum relay network.
From: Comparing one- and two-way quantum repeater architectures
a Results for 128 multiplexed elementary links; b Results for 256 multiplexed elementary links. The y-axis denotes the expectation of the minimum number of Bell pairs generated across all segments. With deterministic swapping operations, the minimum number of Bell pairs across segments also translates into the number of Bell pairs delivered end-to-end. The x-axis denotes the inter-repeater spacing, and N denotes the number of segments. The yellow dashed line shows an upper bound used by prior analyses to approximate the number of Bell pairs delivered.
