Wang, Yi-Xuan

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Wang, Yi-Xuan

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    PublicationAccess status: Open Access ,
    Quantum LOSR networks cannot generate graph states with high fidelity
    (2024)
    Wang, Yi-Xuan
    ;
    Xu, Zhen-Peng
    ;
    Gühne, Otfriedorcid-logo
    Quantum networks lead to novel notions of locality and correlations and an important problem concerns the question of which quantum states can be experimentally prepared with a given network structure and devices and which not. We prove that all multi-qubit graph states arising from a connected graph cannot originate from any quantum network with bipartite sources, as long as feed-forward and quantum memories are not available. Moreover, the fidelity of a multi-qubit graph state and any network state cannot exceed 9/10. Similar results can also be established for a large class of multi-qudit graph states.
    Source Type:Article
    DOI:https://doi.org/10.1038/s41534-024-00806-z
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