Work

Device-independent quantum key distribution with realistic single-photon source implementations

Year: 2024

Type: article

Abstract: Device-independent quantum key distribution (DIQKD) aims at generating secret keys between distant parties without the parties trusting their devices. We investigate a proposal for performing fully photonic DIQKD, based on single photon sources and heralding measurements at a central station placed between the two parties. We derive conditions to attain non-zero secret-key rates in terms of the photon efficiency, indistinguishability and the second order autocorrelation function of the single-photon sources. Exploiting new results on the security bound of such protocols allows us to reduce the requirements on the physical parameters of the setup. Our analysis shows that in the considered schemes, key rates of several hundreds of secret bits per second are within reach at distances of several tens of kilometers.

Source: Optics Express

DOI: 10.1364/oe.497935

Authors: Eva M. González-Ruiz, Javier Rivera-Dean, Marina F. B. Cenni, Anders S. Sørensen, Antonio Acín, Enky Oudot

Institutions: University of Copenhagen, Institute of Photonic Sciences, Barcelona Institute of Science and Technology

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270