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Advances in Mathematical Physics
Volume 2010, Article ID 293245, 14 pages
Research Article

Simulation of Equatorial von Neumann Measurements on GHZ States Using Nonlocal Resources

Group of Applied Physics, University of Geneva, 20 rue de l'Ecole-de-MΓ©decine, 1211 Geneva 4, Switzerland

Received 31 August 2009; Accepted 11 December 2009

Academic Editor: Shao-Ming Fei

Copyright © 2010 Jean-Daniel Bancal et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Reproducing with elementary resources the correlations that arise when a quantum system is measured (quantum state simulation) allows one to get insight on the operational and computational power of quantum correlations. We propose a family of models that can simulate von Neumann measurements in the π‘₯βˆ’π‘¦ plane of the Bloch sphere on 𝑛-partite GHZ states. For the tripartite and fourpartite states, the models use only bipartite nonlocal boxes; they can be translated into classical communication schemes with finite average communication cost.