Reconfigurable entanglement distribution network based on pump management of spontaneous four-wave mixing source
Jingyuan Liu, Dongning Liu, Zhanping Jin, Zhihao Lin, Hao Li, Lixing, You, Xue Feng, Fang Liu, Kaiyu Cui, Yidong Huang, Wei Zhang

TL;DR
This paper introduces a reconfigurable quantum entanglement distribution network utilizing tunable multi-pump SFWM sources and time-sharing, enabling scalable, flexible, and large-scale quantum key distribution among multiple users.
Contribution
It presents a novel reconfigurable entanglement network based on tunable multi-pump SFWM and demonstrates its scalability and reconfigurability through a 10-user QKD setup.
Findings
Two-photon correlation is tunable via pump conditions.
A 10-user fully-connected QKD network is demonstrated.
Linear scaling between user number and frequency channels.
Abstract
Leveraging the unique properties of quantum entanglement, quantum entanglement distribution networks support multiple quantum information applications and are essential to the development of quantum networks. However, its practical implementation poses significant challenges to network scalability and flexibility. In this work, we propose a novel reconfigurable entanglement distribution network based on tunable multi-pump excitation of a spontaneous four-wave mixing (SFWM) source and a time-sharing method. We characterize the two-photon correlation under different pump conditions to demonstrate the effect of pump degenerate and pump non-degenerate SFWM processes on the two-photon correlation, and its tunability. Then as a benchmark application, a 10-user fully-connected quantum key distribution (QKD) network is established in a time-sharing way with triple pump lights. Each user…
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Taxonomy
TopicsQuantum Information and Cryptography · Quantum Computing Algorithms and Architecture · Quantum-Dot Cellular Automata
