of these quantifiers: The first one coincides with the tight lower bound on the geometric measure of discord, so that such lower bound fully captures the quantum correlation of a bipartite system. Accordingly, a vanishing tight lower bound on the geometric discord is a...

Calculation of the quantum discord requires to find the minimum of the quantum conditional entropy S(ρAB|{ΠBk}) over all measurements on the subsystem B. In this paper, we provide a simple relation for the conditional entropy as the difference...

Quantum discord as a measure of the quantum correlations cannot be easily computed formost of density operators. In this paper, we present ameasure of the total quantum correlations that is operationally simple and can be computed effectively...

The effects of temperature and linear coupling constant on the lower bound of the geometric discord and negativity of a qutrit–qutrit system in Heisenberg model with (and without) parallel and antiparallel external magnetic fields have been...

correlations of ρAB and ρAC, measured by entanglement of formation and quantum discord, change under the transformation B→BE and C→CE. Invariance of quantum correlations of ρAB and ρAC under such transformation is shown to be a necessary and sufficient...

discord and fully entangled fraction of two classes of bipartite states and compare their behaviors. These classes are complements to the d⊗d

d⊗d Werner and isotropic states, in the sense that each class possesses the same purification...

is measured. Based on the most demolition concept in the definition of quantum discord, we study the amount of demolition when the two post-measurement states, represented as two points on the steering ellipsoid, have the most distinguishability. We use trace...