Detection Methods in CV-QKD System: A Systematic Literature Review

Continuous Variable Quantum Key Distribution (CV-QKD) aims to strengthen communications security by using quantum mechanics to protect encryption against eavesdropping. In this context, the effective detection of quantum states is a crucial factor for the performance and security of CV-QKD systems. In order to provide a current and concise overview of the detection methods used in experimental CV-QKD setups, 42 articles published between 2019 and 2024 were selected and analyzed. As a result, trends were identified, such as the temporal evolution of publications and the predominant detection method. In summary, CV-KD detection studies have shown an upward trend over the last five years and are promising for the future of communications security.