Quantum steering as a resource for secure tripartite quantum state sharing
Abstract
Quantum state sharing (QSS) is a protocol by which a (secret) quantum state may be securely split into shares, shared between multiple potentially-dishonest players, and reconstructed. Crucially, the players are each assumed to be dishonest, and so QSS requires that only a collaborating authorized subset of players can access the original secret state; any dishonest unauthorized conspiracy cannot reconstruct it. We analyze a QSS protocol involving three untrusted players and demonstrate that quantum steering is the required resource enabling the protocol to proceed securely. We analyze the level of steering required to share any single-mode Gaussian secret which enables the states to be shared with the optimal use of resources.
Citation
Wilkinson , C , Thornton , M & Korolkova , N 2023 , ' Quantum steering as a resource for secure tripartite quantum state sharing ' , Physical Review A , vol. 107 , no. 6 , 062401 . https://doi.org/10.1103/PhysRevA.107.062401
Publication
Physical Review A
Status
Peer reviewed
ISSN
2469-9926Type
Journal article
Description
Funding: This work has been supported by the Scottish Universities Physics Alliance (SUPA) and by the Engineering and Physical Sciences Research Council (EPSRC). C.W. acknowledges the funding from the Global Ph.D. program of the University of St. Andrews and Macquarie University. M.T. and N.K. were supported by the EU Flagship on Quantum Technologies, project PhoG (820365).Collections
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