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. 2014 Dec 2;4:7275. doi: 10.1038/srep07275

Figure 4. Secure key rate calculated for a typical high speed QKD system using real error correction implementations.

Figure 4

(a) The rate as a function of distance for CPU and GPU implementations of LDPC along with a reference Cascade implementation and theoretical ideal error correction. LDPC is shown for three values of the performance tuning parameter p. (b) shows the secure key rate as a percentage of the rate obtained using perfect error correction (f = 1.0 and infinite throughput, shown as black dashed line in (a)).