Continuous Variables (2,3) Threshold Quantum Secret Sharing Schemes

Details Continuous Variables (2,3) Threshold Quantum Secret Sharing Schemes Continuous Variables (2,3) Threshold Quantum Secret Sharing Schemes

2002-10-28

arxiv.org/abs/quant-ph/0210188v1

New Journal of Physics 5 (2003), 4.1-4.13

Physics

Quantum Physics

8 pages, 4 figures

Scientific paper

10.1088/1367-2630/5/1/304

We present two experimental schemes to perform continuous variable (2,3) threshold quantum secret sharing on the quadratures 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 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 both schemes in the ideal case yield perfect secret reconstruction.

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