Routing entanglement in the quantum internet
Name
s41534-019-0139-x.pdf
Description
Published version
Size
1.59 MB
Format
Adobe PDF
Checksum (MD5)
56770e8f53fa13e0421a344943f74058
Author(s)
Pant, Mihir
Englund, Dirk R.
Date Issued
March 2019
Journal
npj Quantum Information
Publisher
Springer Science and Business Media LLC
Citation
Pant, Mihir et al. “Routing entanglement in the quantum internet.” npj Quantum Information, 5, 1 (April 2019): 25 © 2019 The Author(s)
Version
Final published version
Abstract
Remote quantum entanglement can enable numerous applications including distributed quantum computation, secure communication, and precision sensing. We consider how a quantum network—nodes equipped with limited quantum processing capabilities connected via lossy optical links—can distribute high-rate entanglement simultaneously between multiple pairs of users. We develop protocols for such quantum “repeater” nodes, which enable a pair of users to achieve large gains in entanglement rates over using a linear chain of quantum repeaters, by exploiting the diversity of multiple paths in the network. Additionally, we develop repeater protocols that enable multiple user pairs to generate entanglement simultaneously at rates that can far exceed what is possible with repeaters time sharing among assisting individual entanglement flows. Our results suggest that the early-stage development of quantum memories with short coherence times and implementations of probabilistic Bell-state measurements can have a much more profound impact on quantum networks than may be apparent from analyzing linear repeater chains. This framework should spur the development of a general quantum network theory, bringing together quantum memory physics, quantum information theory, quantum error correction, and computer network theory.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/S41534-019-0139-X
