Reverse Reconciliation with Soft Information for Discrete-Modulation CV-QKD at Long Range

2026-03-24

Technology Category

• Search and Optimization: Mixed Discrete/Continuous Search
• Constraint Satisfaction and Optimization: Distributed CSP/Optimization
• Machine Learning: Quantum Machine Learning

Application Category

• Security and Privacy: Large-scale security measurements
• Economics, Online Markets and Human Computation: Trust and reliance of crowd workers and data experts on GenAI
• Search and Retrieval-Augmented AI: Web learning to rank, online learning, and counterfactual learning for ranking

Abstract

We recently introduced a reverse reconciliation scheme with soft information. In this paper, we assess its performance at ultra-low SNR, thus proving that such scheme is a versatile solution to the reverse reconciliation problem.

Problem

• reverse reconciliation
• soft information
• discrete-modulation
• CV-QKD
• long range

Innovation

• reverse reconciliation
• soft information
• discrete-modulation CV-QKD
• ultra-low SNR