Solving the liar detection problem using the four-qubit singlet state

Details Solving the liar detection problem using the four-qubit singlet state Solving the liar detection problem using the four-qubit singlet state

2002-10-11

arxiv.org/abs/quant-ph/0210079v3

Phys. Rev. A 68 (2003) 012304

Physics

Quantum Physics

REVTeX4, 4 pages

Scientific paper

10.1103/PhysRevA.68.012304

A method for solving the Byzantine agreement problem [M. Fitzi, N. Gisin, and
U. Maurer, Phys. Rev. Lett. 87, 217901 (2001)] and the liar detection problem
[A. Cabello, Phys. Rev. Lett. 89, 100402 (2002)] is introduced. The main
advantages of this protocol are that it is simpler and is based on a four-qubit
singlet state already prepared in the laboratory.

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