No nonlocal box with uniform outputs is universal

Details No nonlocal box with uniform outputs is universal No nonlocal box with uniform outputs is universal

2006-09-21

arxiv.org/abs/quant-ph/0609166v1

Physics

Quantum Physics

11 pages, 3 figures

Scientific paper

We show that standard nonlocal boxes, also known as Popescu-Rohrlich machines, are not sufficient to simulate any nonlocal correlations that do not allow signalling. This was known in the multipartite scenario, but we extend the result to the bipartite case. We then generalize this result further by showing that no finite set containing any finite-output-alphabet nonlocal boxes with uniform outputs can be a universal set for nonlocality.

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