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Proceedings Paper

Quantum state sharing
Author(s): Andrew M. Lance; Thomas Symul; Warwick P. Bowen; Barry C. Sanders; Ping Koy Lam
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Paper Abstract

We demonstrate a multipartite protocol that utilizes entanglement to securely distribute and reconstruct a quantum state. A secret quantum state is encoded into a tripartite entangled state and distributed to three players. By collaborating together, a majority of the players can reconstruct the state, whilst the remaining player obtains nothing. This (2,3) threshold quantum state sharing scheme is characterized in terms of fidelity (F), signal transfer (T) and reconstruction noise (V). We demonstrate a fidelity averaged over all reconstruction permutations of 0.73 ± 0.04, a level achievable only using quantum resources.

Paper Details

Date Published: 25 May 2004
PDF: 10 pages
Proc. SPIE 5468, Fluctuations and Noise in Photonics and Quantum Optics II, (25 May 2004); doi: 10.1117/12.546945
Show Author Affiliations
Andrew M. Lance, Australian National Univ. (Australia)
Thomas Symul, Australian National Univ. (Australia)
Warwick P. Bowen, Australian National Univ. (Australia)
Barry C. Sanders, Univ. of Calgary (Canada)
Ping Koy Lam, Australian National Univ. (Australia)

Published in SPIE Proceedings Vol. 5468:
Fluctuations and Noise in Photonics and Quantum Optics II
Peter Heszler, Editor(s)

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