Is quantum secret sharing different to the sharing of a quantum secret?

Andrew M. Lance; Thomas Symul; Warwick P. Bowen; Tomas Tyc; Barry C. Sanders; Ping Koy Lam

doi:10.1117/12.505349

3 February 2004 Is quantum secret sharing different to the sharing of a quantum secret?

Andrew M. Lance, Thomas Symul, Warwick P. Bowen, Tomas Tyc, Barry C. Sanders, Ping Koy Lam

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Proceedings Volume 5161, Quantum Communications and Quantum Imaging; (2004) https://doi.org/10.1117/12.505349
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

We present an experimental scheme to perform continuous variable (2,3) threshold quantum secret sharing on the quadratures amplitudes of bright light beams. It requires a pair of entangled light beams and an electro-optic feedforward loop for the reconstruction of the secret. We examine the efficacy of quantum secret sharing in terms of fidelity, as well as the signal transfer coefficients and the conditional variances of the reconstructed output state. We show that, in the ideal limit, perfect secret reconstruction is possible. We discuss two different definitions of quantum secret sharing: the sharing of a quantum secret and the sharing of a classical secret with quantum resources.

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Andrew M. Lance, Thomas Symul, Warwick P. Bowen, Tomas Tyc, Barry C. Sanders, and Ping Koy Lam "Is quantum secret sharing different to the sharing of a quantum secret?", Proc. SPIE 5161, Quantum Communications and Quantum Imaging, (3 February 2004); https://doi.org/10.1117/12.505349

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KEYWORDS

Beam splitters

Surface plasmons

Quantum information

Electro optics

Modulation

Reflectivity

Signal detection

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