3 papers
math-ph2019
A strengthened data processing inequality for the Belavkin-Staszewski relative entropy
Andreas Bluhm, Angela Capel
In this work, we provide a strengthening of the data processing inequality for the relative entropy introduced by Belavkin and Staszewski (BS-entropy). This extends previous result…
quant-ph2018
Compatibility of quantum measurements and inclusion constants for the matrix jewel
Andreas Bluhm, Ion Nechita
In this work, we establish the connection between the study of free spectrahedra and the compatibility of quantum measurements with an arbitrary number of outcomes. This generalize…
quant-ph2018
Joint measurability of quantum effects and the matrix diamond
Andreas Bluhm, Ion Nechita
In this work, we investigate the joint measurability of quantum effects and connect it to the study of free spectrahedra. Free spectrahedra typically arise as matricial relaxations…