Revisiting the operator extension of strong subadditivity

Lauritz van Luijk, Alexander Stottmeister, Henrik Wilming

We give a new proof of the operator extension of the strong subadditivity of von Neumann entropy ${\rho }_{AB}\otimes {\sigma }_C^{-1}\le {\rho }_A\otimes {\sigma }_{BC}^{-1}$ by identifying the mathe…