Progress on Quantum Discord of Two Qubit states: Optimization and Upper Bound

S. Javad Akhtarshenas, Hamidreza Mohammadi, Fahimeh S. Mousavi +1

Calculation of the quantum discord requires to find the minimum of the quantum conditional entropy $S({\rho }^{AB}|\{{\Pi }_k^B\})$ over all measurements on the subsystem $B$. In this paper…