Fig. 5

Raw throughput \(K_{{\mathrm{GPU}}}^{{\mathrm{raw}}}\) vs. distance of GPU-based LDPC decoders for CV- and DV-QKD. For CV-QKD implementations,^31,32,85 the annotated values indicate the LDPC code code block length n, code rate R, reconciliation efficiency β, and SNR of the quantum channel. For DV-QKD implementations, the annotated values indicate the block length n, code rate R, and QBER.^15,65,86 Our LDPC decoder throughput result is obtained using a single NVIDIA GeForce GTX 1080 GPU