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Quantum blockchain using weighted hypergraph states
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DOI：10.1103/PhysRevResearch.2.013322.png)
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Abstract
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Using the multiparty entanglement of quantum weighted hypergraph states, we built a protocol to build a quantum blockchain. In this protocol, the information contained by the classical blocks is initialized at a single qubit that acts as a vertex of the corresponding hypergraph and the entanglement of the hypergraph state serves the purpose of the chain. The security and effectiveness of the protocol are then outlined. We further provide a quantum circuit and implement it on IBM's five-qubit computer with single- and two-qubit quantum gates as components.
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