Noh, Kyungjoo, Pirandola, Stefano orcid.org/0000-0001-6165-5615 and Jiang, Liang (2020) Enhanced energy-constrained quantum communication over bosonic Gaussian channels. Nature Communications. 457. ISSN 2041-1723
Abstract
Quantum communication is an important branch of quantum information science, promising unconditional security to classical communication and providing the building block of a future large-scale quantum network. Noise in realistic quantum communication channels imposes fundamental limits on the communication rates of various quantum communication tasks. It is therefore crucial to identify or bound the quantum capacities of a quantum channel. Here, we consider Gaussian channels that model energy loss and thermal noise errors in realistic optical and microwave communication channels and study their various quantum capacities in the energy-constrained scenario. We provide improved lower bounds to various energy-constrained quantum capacities of these fundamental channels and show that higher communication rates can be attained than previously believed. Specifically, we show that one can boost the transmission rates of quantum information and private classical information by using a correlated multi-mode thermal state instead of the single-mode thermal state of the same energy.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2020 |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Computer Science (York) |
Depositing User: | Pure (York) |
Date Deposited: | 24 Jan 2020 11:50 |
Last Modified: | 16 Oct 2024 16:21 |
Published Version: | https://doi.org/10.1038/s41467-020-14329-6 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1038/s41467-020-14329-6 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:155994 |