Entanglement Distribution in Quantum Repeater with Purification and Optimized Buffer Time

Abstract

Quantum repeater networks that allow long-distance entanglement distribution will be the backbone of distributed quantum information processing. In this paper we explore entanglement distribution using quantum repeaters with optimized buffer time, equipped with noisy quantum memories and performing imperfect entanglement purification and swapping. We observe that increasing the number of memories on end nodes leads to a higher entanglement distribution rate per memory and higher probability of high-fidelity entanglement distribution, at least for the case with perfect operations. When imperfect operations are considered, however, we make the surprising observation that the per-memory entanglement rate decreases with increasing number of memories. Our results suggest that building quantum repeaters that perform well under realistic conditions requires careful modeling and design that takes into consideration the operations and resources that are finite and imperfect.

arXiv comment6 pages, 4 figures, IEEE INFOCOM'23 NetSciQCom 2023

References in corpus (16)

• The Quantum Internet
• Purification of Noisy Entanglement and Faithful Teleportation via Noisy Channels
• Advances in Quantum Cryptography
• Quantum privacy amplification and the security of quantum cryptography over noisy channels
• Quantum repeaters based on entanglement purification
• Efficient long distance quantum communication
• Fault-tolerant Quantum Communication with Minimal Physical Requirements
• An improved bound on distillable entanglement
• Fault-tolerant quantum repeaters with minimal physical resources, and implementations based on single photon emitters
• Towards a Distributed Quantum Computing Ecosystem
• SeQUeNCe: A Customizable Discrete-Event Simulator of Quantum Networks
• Optimal approach to quantum communication using dynamic programming
• Optimising repeater schemes for the quantum internet
• Efficient computation of the waiting time and fidelity in quantum repeater chains
• Quantum repeater architecture with hierarchically optimized memory buffer times
• Rate limits in quantum networks with lossy repeaters

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• Analytical Performance Estimations for Quantum Repeater Network Scenarios
• On noise in swap ASAP repeater chains: exact analytics, distributions and tight approximations
• Cross-Validating Quantum Network Simulators
• Quantum Advantage in Distributed Sensing with Noisy Quantum Networks