Work

Continuous-variable measurement-device-independent quantum key distribution in free-space channels

Year: 2023

Type: article

Abstract: The field of space communications is the realm of communication technologies where diffraction and atmospheric effects, both of which contribute to loss and noise, become overriding. The pertinent questions here are how and at which rate information (secret keys) can be securely transferred (shared) among users under such supposedly severe circumstances. In the present work we study continuous-variable quantum key distribution in a measurement-device-independent configuration over free-space optical links. We assess the turbulence regime and provide a composable finite-size key rate analysis of the protocol for such links. We study both short-range, horizontal communication links as well as slant paths to, e.g., high-altitude platform station systems.

Source: Physical Review A

DOI: 10.1103/physreva.108.042621

Authors: Masoud Ghalaii, Stefano Pirandola

Institutions: University of Leeds, University of York

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,675

Funder: Engineering and Physical Sciences Research Council