Work

Reducing the number of single-photon detectors in quantum-key-distribution networks by time multiplexing

Year: 2024

Type: article

Abstract: We demonstrate a method to reduce the number of single-photon detectors (SPDs) required in multiparty quantum key distribution (QKD) networks by a factor of 2 by using detector time multiplexing (DTM). We implement the DTM scheme for an entanglement-based time-bin protocol and compare QKD results with and without DTM in our QKD network with four users. When small efficiency losses are acceptable, DTM enables cost-effective, scalable implementations of multiuser QKD networks.

Source: Physical Review A

DOI: 10.1103/physreva.109.012618

Authors: Jakob Kaltwasser, Joschka Seip, Erik Fitzke, Maximilian Tippmann, Thomas Walther

Institution: Technische Universität Darmstadt

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: Deutsche Forschungsgemeinschaft

Awards: G4158655670, SFB 1119: CROSSING Kryptographiebasierte Sicherheitslösungen als Grundlage für Vertrauen in heutigen und zukünftigen ITSystemen