A Polar Code-Based Hierarchical Data Coordination Method for Continuous Variable Quantum Key Distribution Systems
A technology of quantum key distribution and layered data, applied to key distribution, to achieve the effect of improving security code rate, good error correction performance, and high coordination efficiency
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[0024] The following is an example of positive coordination, combined with the accompanying drawings figure 1 Embodiments of the present invention will be described in detail. The present invention is a layered data coordination method based on polar codes used in a continuous variable quantum key distribution system. The specific implementation is as follows:
[0025] In the CV-QKD system, the legal communication parties, the sender Alice and the receiver Bob, hold a set of correlated continuous variables after quantum state preparation, quantum state transmission and quantum state detection. Due to the noise interference in the quantum channel, the continuous variables held by the two parties are inconsistent, and the two parties need to obtain a consistent key through the data coordination process.
[0026] For a Gaussian modulated coherent state system, suppose Alice’s original data is X, the modulation variance is ∑2, and X obeys a Gaussian distribution with a mean value...
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