Mapping Guaranteed Positive Secret Key Rates for Continuous Variable Quantum Key Distribution

• URL: http://arxiv.org/abs/2310.17324v1
• Date: Thu, 26 Oct 2023 11:44:39 GMT
• Title: Mapping Guaranteed Positive Secret Key Rates for Continuous Variable Quantum Key Distribution
• Authors: Mikhael Sayat, Oliver Thearle, Biveen Shajilal, Sebastian P. Kish, Ping Koy Lam, Nicholas Rattenbury, John Cater
• Abstract summary: Continuous variable quantum key distribution (CVQKD) is the sharing of secret keys between different parties using the continuous amplitude and phasera quadtures of light. Here, a comparison tool has been developed to map regions of positive secret key rate (SKR) The method has been developed for discrete modulated CVQKD (DM-CVQKD) protocols but can be extended to other current and future protocols and security proofs.
• Score: 0.21111026813272177
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Continuous variable quantum key distribution (CVQKD) is the sharing of secret keys between different parties using the continuous amplitude and phase quadratures of light. There are many protocols in which different modulation schemes are used to implement CVQKD. However, there has been no tool for comparison between different CVQKD protocols to determine the optimal protocol for varying channels while simultaneously taking into account the effects of different parameters. Here, a comparison tool has been developed to map regions of positive secret key rate (SKR), given a channel's transmittance and excess noise, where a user's modulation can be adjusted to guarantee a positive SKR in an arbitrary environment. The method has been developed for discrete modulated CVQKD (DM-CVQKD) protocols but can be extended to other current and future protocols and security proofs.

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