Continuous variable (2, 3) threshold quantum secret sharing schemes

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

doi:10.1088/1367-2630/5/1/304

Continuous variable (2, 3) threshold quantum secret sharing schemes

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

We present two schemes to perform continuous variable (2, 3) threshold quantum secret sharing (QSS) on the quadrature amplitudes of bright light beams. Both schemes require a pair of entangled light beams. The first scheme utilizes two phase sensitive optical amplifiers, whilst the second uses an electro-optic feedforward loop for the reconstruction of the secret. We examine the efficacy of QSS in terms of fidelity, as well as the signal transfer coefficients and the conditional variances of the reconstructed output state. We show that both schemes in the ideal case yield perfect secret reconstruction.

Original language	English
Pages (from-to)	4.1-4.13
Journal	New Journal of Physics
Volume	5
DOIs	https://doi.org/10.1088/1367-2630/5/1/304
Publication status	Published - 17 Jan 2003

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AU - Lam, Ping Koy

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AB - We present two schemes to perform continuous variable (2, 3) threshold quantum secret sharing (QSS) on the quadrature amplitudes of bright light beams. Both schemes require a pair of entangled light beams. The first scheme utilizes two phase sensitive optical amplifiers, whilst the second uses an electro-optic feedforward loop for the reconstruction of the secret. We examine the efficacy of QSS in terms of fidelity, as well as the signal transfer coefficients and the conditional variances of the reconstructed output state. We show that both schemes in the ideal case yield perfect secret reconstruction.

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Continuous variable (2, 3) threshold quantum secret sharing schemes

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