Tripartite Quantum State Sharing
Quantum Physics
2009-11-10 v2
Abstract
We demonstrate a multipartite protocol to securely distribute and reconstruct a quantum state. A secret quantum state is encoded into a tripartite entangled state and distributed to three players. Any two of the three players are able to reconstruct the state, whilst individual players obtain nothing. We characterize this (2,3) threshold quantum state sharing scheme in terms of fidelity, signal transfer and reconstruction noise. We demonstrate a fidelity averaged over all reconstruction permutations of 0.73, which is achievable only using quantum resources.
Cite
@article{arxiv.quant-ph/0311015,
title = {Tripartite Quantum State Sharing},
author = {Andrew M. Lance and Thomas Symul and Warwick P. Bowen and Barry C. Sanders and Ping Koy Lam},
journal= {arXiv preprint arXiv:quant-ph/0311015},
year = {2009}
}
Comments
Published Phys. Rev. Lett. 92, 177903 (2004)