Authors: Pavel Trojek Christian Schmid Mohamed Bourennane Časlav Brukner Marek Żukowski Harald Weinfurter
Publish Date: 2013/01/05
Volume: 12, Issue: 1, Pages: 19-26
Abstract
Most proposals for quantum solutions of informationtheoretic problems rely on the usage of multipartite entangled states which are still difficult to produce experimentally with current stateoftheart technology Here we analyze a scheme to simplify a particular kind of multiparty communication protocols for the experiment We prove that the fidelity of two 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 stateoftheart setup the experimental implementation for N = 5 outperforms the best classical protocol making it the candidate for multiparty quantum communication applications
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