Information Reconciliation for Continuous-Variable Quantum Key Distribution using Non-Binary Low-Density Parity-Check Codes

February 29, 2016 Β· Declared Dead Β· πŸ› arXiv.org

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Authors Christoph Pacher, Jesus Martinez-Mateo, JΓΆrg Duhme, Tobias Gehring, Fabian Furrer arXiv ID 1602.09140 Category quant-ph: Quantum Computing Cross-listed cs.IT Citations 13 Venue arXiv.org Last Checked 5 months ago
Abstract
An information reconciliation method for continuous-variable quantum key distribution with Gaussian modulation that is based on non-binary low-density parity-check (LDPC) codes is presented. Sets of regular and irregular LDPC codes with different code rates over the Galois fields $GF(8)$, $GF(16)$, $GF(32)$, and $GF(64)$ have been constructed. We have performed simulations to analyze the efficiency and the frame error rate using the sum-product algorithm. The proposed method achieves an efficiency between $0.94$ and $0.98$ if the signal-to-noise ratio is between $4$ dB and $24$ dB.
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