Physics – Quantum Physics
Scientific paper
2011-12-05
Physics
Quantum Physics
5 pages
Scientific paper
Most of known multipartite Bell inequalities are for correlation functions for all subsystems. We propose a method of derivation of tight Bell inequalities involving also correlations of lower order. An example of a N-qubit state, which violates such inequalities despite vanishing N-qubit correlations is given. We show how to derive a necessary condition for a state to violate such inequalities.
Nawareg Mohamed
Wiesniak Marcin
Zukowski Marek
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