We develop a general strategy for the detection of nonclassical system-environment correlations in the initial states of an open quantum system. The method employs a dephasing map which operates locally on the open system and leads to an experimentally accessible witness for genuine quantum correlations, measuring the Hilbert-Schmidt distance between pairs of open system states. We further deri...

In this paper we determine the class of quantum states whose density matrix representation can be derived from graph Laplacian matrices associated with a weighted directed graph and we call them graph Laplacian quantum states. Then we obtain structural properties of these graphs such that the corresponding graph Laplacian states have zero quantum discord by investigating structural properties o...

We examine the literature on marital discord to identify potential indicators. Welldocumented indicators are found both in the interpersonal and intra-individual realms.Personality factors and other abiding individual difference variables appear to play a rolein the development of marital discord. An integrative model is offered, highlighting thepotential for interpersonal, ...