Continuous-Variable Measurement-Device-Independent Quantum Key Distribution in Free-Space Channels

Masoud Ghalaii; Stefano Pirandola

doi:10.1103/PhysRevA.108.042621

Continuous-Variable Measurement-Device-Independent Quantum Key Distribution in Free-Space Channels

Masoud Ghalaii, Stefano Pirandola

Computer Science

Research output: Contribution to journal › Article › peer-review

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 (CV) quantum key distribution (QKD) in a measurement-device-independent (MDI) configuration over free-space optical (FSO) links. We assess the turbulence regime and provide a composable finite-size key rate analysis of the protocol for FSO links. We study both short-range, horizontal communication links as well as slant paths to, e.g., high-altitude platform station (HAPS) systems.

Original language	English
Article number	042621
Number of pages	10
Journal	Physical Review A
Volume	108
DOIs	https://doi.org/10.1103/PhysRevA.108.042621
Publication status	Published - 26 Oct 2023

Bibliographical note

9 pages, 6 figures

Keywords

quant-ph

Access to Document

10.1103/PhysRevA.108.042621Licence: CC BY

2212.06687v1Accepted author manuscript, 2.52 MB
PhysRevA.108.042621Final published version, 1.24 MBLicence: CC BY

Cite this

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