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An Improved Slice Reconciliation Protocol for Continuous-Variable Quantum Key Distribution
| Content Provider | MDPI |
|---|---|
| Author | Wen, Xuan Li, Qiong Mao, Haokun Wen, Xiaojun Chen, Nan |
| Copyright Year | 2021 |
| Description | Reconciliation is an essential procedure for continuous-variable quantum key distribution (CV-QKD). As the most commonly used reconciliation protocol in short-distance CV-QKD, the slice error correction (SEC) allows a system to distill more than 1 bit from each pulse. However, the quantization efficiency is greatly affected by the noisy channel with a low signal-to-noise ratio (SNR), which usually limits the secure distance to about 30 km. In this paper, an improved SEC protocol, named Rotated-SEC (RSEC), is proposed through performing a random orthogonal rotation on the raw data before quantization, and deducing a new estimator for the quantized sequences. Moreover, the RSEC protocol is implemented with polar codes. The experimental results show that the proposed protocol can reach up to a quantization efficiency of about 99%, and maintain at around 96% even at the relatively low SNRs |
| Starting Page | 1317 |
| e-ISSN | 10994300 |
| DOI | 10.3390/e23101317 |
| Journal | Entropy |
| Issue Number | 10 |
| Volume Number | 23 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-10-09 |
| Access Restriction | Open |
| Subject Keyword | Entropy Quantum Science and Technology Continuous-variable Quantum Key Distribution Reconciliation Slice Error Correction Polar Codes Finite-size Effect |
| Content Type | Text |
| Resource Type | Article |
