  We discuss the problem of separating the total correlations in a given
quantum joint probability distribution into nonlocality, contextuality and
classical correlations. Bell discord and Mermin discord which qunatify
nonlocality and contextuality of quantum correlations are interpreted as
distance measures in the nonsignaling polytope. A measure of total correlations
is introduced to divide the total amount of correlations into a purely
nonclassical part and a classical part. We show that quantum correlations
satisfy additivity relations among these three measures.

Quantum Physics