Improving entanglement generation rates in trapped ion quantum networks using nondestructive photon measurement and storage

• Published in: arXiv.org
• Main Authors: Hannegan, John, Siverns, James D, Cassell, Jake, Quraishi, Qudsia
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 24.03.2021
• Subjects: C band; Computer architecture; Data processing; Networks; Nodes; Optical frequency; Photons; Physics - Atomic Physics; Physics - Quantum Physics; Quantum entanglement; Quantum phenomena
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2101.04236

Long range quantum information processing will require the integration of different technologies to form hybrid architectures combining the strengths of multiple quantum systems. In this work, we propose a hybrid networking architecture designed to improve entanglement rates in quantum networks based on trapped ions. Trapped ions are excellent candidates as network nodes but photon losses make long-distance networking difficult. To overcome some losses and extend the range of trapped-ion-based networks, we propose including neutral-atom-based non-destructive single-photon detection and single photon storage in between networking nodes, forming a hybrid network. This work builds on recently demonstrated optical frequency conversion of single photons emitted by trapped ions. We derive the average two-node entanglement rate for this proposed network architecture as a function of distance. Using reasonable experimental parameters, we show this proposed quantum network can generate remote entanglement rates up to a factor of 100 larger than that of an equivalent homogeneous network at both near-IR and C-band wavelengths for distances up to 50 km.