Experimental quantum communication complexity

Details Experimental quantum communication complexity Experimental quantum communication complexity

2005-02-11

arxiv.org/abs/quant-ph/0502066v1

Phys. Rev. A 72, 050305(R) (2005)

Physics

Quantum Physics

4 pages, 2 eps figures, RevTEX4; submitted June 23, 2004

Scientific paper

10.1103/PhysRevA.72.050305

We prove that the fidelity of two exemplary communication complexity protocols, allowing for an N-1 bit communication, can be exponentially improved by N-1 (unentangled) qubit communication. Taking into account, for a fair comparison, all inefficiencies of state-of-the-art set-up, the experimental implementation outperforms the best classical protocol, making it the candidate for multi-party quantum communication applications.

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