Abstract:
:Quantum communication and computing offer many new opportunities for information processing in a connected world. Networks using quantum resources with tailor-made entanglement structures have been proposed for a variety of tasks, including distributing, sharing and processing information. Recently, a class of states known as graph states has emerged, providing versatile quantum resources for such networking tasks. Here we report an experimental demonstration of graph state-based quantum secret sharing--an important primitive for a quantum network with applications ranging from secure money transfer to multiparty quantum computation. We use an all-optical setup, encoding quantum information into photons representing a five-qubit graph state. We find that one can reliably encode, distribute and share quantum information amongst four parties, with various access structures based on the complex connectivity of the graph. Our results show that graph states are a promising approach for realising sophisticated multi-layered communication protocols in quantum networks.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Bell BA,Markham D,Herrera-Martí DA,Marin A,Wadsworth WJ,Rarity JG,Tame MSdoi
10.1038/ncomms6480subject
Has Abstractpub_date
2014-11-21 00:00:00pages
5480issn
2041-1723pii
ncomms6480journal_volume
5pub_type
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