Andrew M Lance et al 2003 New J. Phys. 5 4 doi:10.1088/1367-2630/5/1/304
Continuous variable (2, 3) threshold quantum secret sharing schemes
Andrew M Lance1, Thomas Symul1, Warwick P Bowen1, Tomás Tyc2,3, Barry C Sanders2 and Ping Koy Lam1
Show affiliationsWe 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.
- PACS
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42.50.Dv Quantum state engineering and measurements
03.67.Hk Quantum communication
03.67.Mn Entanglement measures, witnesses, and other characterizations
- Subjects
- Dates
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Issue 1 (January 2003)
Received 22 October 2002
Published 17 January 2003
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Continuous variable (2, 3) threshold quantum secret sharing schemes
Andrew M Lance et al 2003 New J. Phys. 5 4
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