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

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

Research output: Contribution to journalArticle

28 Citations (Scopus)
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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 languageEnglish
Pages (from-to)4.1-4.13
Number of pages13
JournalNew Journal of Physics
Publication statusPublished - 2003

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Copyright 2003 IOP Publishing Ltd. Reprinted from New journal of physics. This material is posted here with the permission of IOP Publishing Ltd and the authors. Use of this material is permitted for personal, research and non-commercial uses. Further information regarding the copyright applicable to this article can be viewed at

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