Riegelmeyer, Jan, Wignall, Dan, Estarellas, Marta P. et al. (2 more authors) (2020) Generation and robustness of quantum entanglement in spin graphs. Quantum Information Processing. 2. ISSN 1570-0755
Abstract
Entanglement is a crucial resource for quantum information processing, and so protocols to generate high-fidelity entangled states on various hardware platforms are in demand. While spin chains have been extensively studied to generate entanglement, graph structures also have such potential; however, only a few classes of graphs have been explored for this specific task. In this paper, we apply a particular coupling scheme involving two different coupling strengths to a graph of two interconnected 3 × 3 square graphs such that it effectively contains three defects. We show how this structure allows generation of a Bell state whose fidelity depends on the chosen coupling ratio. We apply partitioned graph theory in order to reduce the dimension of the graph and show that, using a reduced graph or a reduced chain, we can still simulate the same protocol with identical dynamics. Finally, we investigate how fabrication errors affect the entanglement generation protocol and how the different equivalent structures are affected, finding that for some specific coupling ratios they are extremely robust.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2020 |
Keywords: | Partition graphs,Quantum computation,Quantum entanglement,Quantum information,Quantum networks,Spin graphs |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > York Institute for Materials Research The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 08 Jan 2021 14:30 |
Last Modified: | 11 Dec 2024 00:16 |
Published Version: | https://doi.org/10.1007/s11128-020-02943-8 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1007/s11128-020-02943-8 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:169868 |
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Filename: Riegelmeyer2020_Article_GenerationAndRobustnessOfQuant.pdf
Description: Generation and robustness of quantum entanglement in spin graphs
Licence: CC-BY 2.5