Virtual zero-photon catalysis for improving continuous-variable quantum key distribution via Gaussian post-selection.

ABSTRACT: Quantum catalysis is a feasible approach to increase the performance of continuous-variable quantum key distribution (CVQKD), involving the special zero-photon catalysis (ZPC) operation. However, in the practical point of view, the improvement effect of this operation will be limited by the imperfection of the photon detector. In this paper, we show that the ZPC operation at the sender can be simulated by a post-selection method without implementing it in practical devices. While performing this virtual version of ZPC in CVQKD, we can not only reach the ideal case of its practical implementation with minimal hardware requirement, but also keep the benefit of Gaussian security proofs. Based on Gaussian modulated coherent state protocols with achievable parameters, we enhance the security of

SUBMITTER: Zhong H 

PROVIDER: S-EPMC7567868 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature