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

Abstract

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.

REVTeX4, 4 pages

References in corpus (4)

• Theory of Decoherence-Free Fault-Tolerant Universal Quantum Computation
• Four Photon Entanglement from Down Conversion
• A Quantum solution to the Byzantine agreement problem
• N-particle N-level singlet states: Some properties and applications

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