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Simulation study on reverse reconciliation of a continuous variable quantum key distribution system

Kang Li, Li Yu, Bojun Yang

We have demonstrated a reverse reconciliation of a continuous-variable quantum key distribution system with efficient low-density parity check codes. A standard coded modulation technique, called Multi Level Coding/ Multistage Decoding scheme, is used to optimize the reconciliation. Via a numerical simulation, we get the results that efficiency of the reconciliation algorithm reaches 0.89 while the final secure key distribution rate of the whole system is more than 2.2 kbits/s over 20 km of single-mode optical fiber.We have demonstrated a reverse reconciliation of a continuous-variable quantum key distribution system with efficient low-density parity check codes. A standard coded modulation technique, called Multi Level Coding/ Multistage Decoding scheme, is used to optimize the reconciliation. Via a numerical simulation, we get the results that efficiency of the reconciliation algorithm reaches 0.89 while the final secure key distribution rate of the whole system is more than 2.2 kbits/s over 20 km of single-mode optical fiber.

China-Ireland International Conference on Information and Communications Technologies (CIICT)Jan 1, 20080 citations

Comprehensive high-speed reconciliation for continuous-variable quantum key distribution

Dabo Guo, Chao He, Tianhao Guo +3 more

Quantum Information ProcessingAug 28, 202020 citations

Algorithm of Multidimensional Reconciliation for Continuous-Variable Quantum Key Distribution

王云艳 Wang Yunyan, 郭大波 Guo Dabo, 张彦煌 Zhang Yanhuang +2 more

Acta Optica SinicaJan 1, 20141 citation

Unconditional Security Proof of Long-Distance Continuous-Variable Quantum Key Distribution with Discrete Modulation

Anthony Leverrier, Philippe Grangier

We present a continuous-variable quantum key distribution protocol combining a discrete modulation and reverse reconciliation. This protocol is proven unconditionally secure and allows the distribution of secret keys over long distances, thanks to a reverse reconciliation scheme efficient at very low signal-to-noise ratio.

arXiv:0812.4246Physical Review LettersMay 6, 2009409 citations

Reverse Reconciliation for Continuous Variable Quantum Key Distribution

Yongmin Li

Based on the Multilevel Codes/Multistage Decoding system,we achieved the reverse reconciliation for continuous variable quantum key distribution.Firstly,we show how to select the optimal quantization interval by maximizing the mutual information between the communicating parties.Then the optimal rate of each equivalent channel is calculated at the SNR level of 4 dB.The low-density parity check(LDPC) code is chosen as the channel codes,and the reverse reconciliation utilize a side-information based LDPC iterative decoding algorithm.Based on the Multilevel Codes/Multistage Decoding system,we achieved the reverse reconciliation for continuous variable quantum key distribution.Firstly,we show how to select the optimal quantization interval by maximizing the mutual information between the communicating parties.Then the optimal rate of each equivalent channel is calculated at the SNR level of 4 dB.The low-density parity check(LDPC) code is chosen as the channel codes,and the reverse reconciliation utilize a side-information based LDPC iterative decoding algorithm.

Acta Sinica Quantum OpticaJan 1, 20120 citations

High-efficiency Gaussian key reconciliation in continuous variable quantum key distribution

Zengliang Bai, Xuyang Wang, Shenshen Yang +1 more

Science China Physics Mechanics and AstronomyDec 18, 201535 citations

Reverse reconciliation for continuous variable quantum key distribution

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Reverse reconciliation for continuous variable quantum key distribution

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