The structure of Bell inequalities

Details The structure of Bell inequalities The structure of Bell inequalities

2003-12-12

arxiv.org/abs/quant-ph/0312117v1

Physics

Quantum Physics

12 pages, 3 figures

Scientific paper

We present an analysis of the structure of Bell inequalities, mainly for the case of N qubits with two observables each. We show that these inequalities are related to Hadamard matrices and define Bell polynomials (in one variable) as an additional tool. With these aids we raise several conditions the coefficients of Bell inequalities must satisfy, and recursively generate the whole set of inequalities starting from N=1. Moreover, we prove some characteristic features of this set, such as that most of the inequalities contain all expectation values under consideration. Finally, we show how the presented results can be used to construct Bell inequalities with certain properties. An outlook on further research topics concludes the paper.

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