Active basis choice for quantum key distribution with entangled states

P. M. Vinetskaya, K. S. Kravtsov, N. A. Borshchevskaia, A. N. Klimov, and S. P. Kulik

Laser Physics Letters, 20, 5, 055201 (2023)

Entangled quantum key distribution (QKD) is a promising way to generate pairs of unconditionally secret keys. In this paper we review possible realizations of entanglement-based QKD and assess their feasibility in terms of implementation complexity and provided security. We also propose a novel active basis choice approach that enables to use only one single-photon detector per user. The paper provides all necessary details including the required electro-optic crystal configurations to implement such a scheme experimentally.