Laurenza, Riccardo, Braunstein, Samuel L. orcid.org/0000-0003-4790-136X and Pirandola, Stefano orcid.org/0000-0001-6165-5615 (2018) Finite-resource teleportation stretching for continuous-variable systems. Scientific Reports. 15267. ISSN 2045-2322
Abstract
We show how adaptive protocols of quantum and private communication through bosonic Gaussian channels can be simplified into much easier block versions that involve resource states with finite energy. This is achieved by combining the adaptive-to-block reduction technique devised in [Pirandola et al., arXiv:1510.08863], based on teleportation stretching and relative entropy of entanglement, with the simulation of Gaussian channels introduced by [Liuzzo-Scorpo et al., arXiv:1705.03017]. In this way, we derive weak converse upper bounds for the secret-key capacity of phase-insensitive Gaussian channels, which closely approximate the optimal limit for infinite energy. Our results apply to both point-to-point and repeater-assisted private communications.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © The Author(s) 2018 |
Dates: |
|
Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Computer Science (York) |
Depositing User: | Pure (York) |
Date Deposited: | 16 Oct 2018 09:00 |
Last Modified: | 24 Oct 2024 00:03 |
Published Version: | https://doi.org/10.1038/s41598-018-33332-y |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1038/s41598-018-33332-y |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:137217 |