Proposed experiment for the quantum "Guess my number" protocol

Details Proposed experiment for the quantum "Guess my number" protocol Proposed experiment for the quantum "Guess my number" protocol

2004-09-27

arxiv.org/abs/quant-ph/0409191v2

Phys. Rev. A 71 (2005) 020301(R)

Physics

Quantum Physics

REVTeX4, 4 pages, 1 figure

Scientific paper

10.1103/PhysRevA.71.020301

An experimental realization of the entanglement-assisted "Guess my number" protocol for the reduction of communication complexity, introduced by Steane and van Dam, would require producing and detecting three-qubit GHZ states with an efficiency eta > 0.70, which would require single photon detectors of efficiency sigma > 0.89. We propose a modification of the protocol which can be translated into a real experiment using present-day technology. In the proposed experiment, the quantum reduction of the multi-party communication complexity would require an efficiency eta > 0.05, achievable with detectors of sigma > 0.47, for four parties, and eta > 0.17 (sigma > 0.55) for three parties.

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