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An efficient error reconciliation scheme is important for post-processing ofquantum key distribution (QKD). Recently, a multi-matrix low-densityparity-check codes based reconciliation algorithm which can provide remarkableperspectives for high efficiency information reconciliation was proposed. Thispaper concerns the improvement of reconciliation performance. Multi-matrixalgorithm is implemented and optimized on the graphics processing unit (GPU) toobtain high reconciliation throughput. Experimental results indicate thatGPU-based algorithm can highly improve reconciliation throughput to an average85.67 Mbps and a maximum 102.084 Mbps with typical code rate and efficiency.This is the best performance of reconciliation on GPU platform to ourknowledge.

100Mbps Reconciliation for Quantum Key Distribution Using a Single Graphics Processing Unit