Quantum Correlations Are Stronger Than All Nonsignaling Correlations Produced by n Outcome Measurements
Abstract
We show that, for any n , there are m outcome quantum correlations, with m >n , which are stronger than any nonsignaling correlation produced from selecting among n outcome measurements. As a consequence, for any n , there are m outcome quantum measurements that cannot be constructed by selecting locally from the set of n outcome measurements. This is a property of the set of measurements in quantum theory that is not mandatory for general probabilistic theories. We also show that this prediction can be tested through highprecision Belltype experiments and identify past experiments providing evidence that some of these strong correlations exist in nature. Finally, we provide a modified version of quantum theory restricted to having at most n outcome quantum measurements.
 Publication:

Physical Review Letters
 Pub Date:
 October 2016
 DOI:
 10.1103/PhysRevLett.117.150401
 arXiv:
 arXiv:1505.04179
 Bibcode:
 2016PhRvL.117o0401K
 Keywords:

 Quantum Physics
 EPrint:
 6 pages, 1 figure