Additivity violation of the regularized minimum output entropy
Additivity violation of the regularized minimum output entropy
The problem of additivity of the Minimum Output Entropy is of fundamental importance in Quantum Information Theory (QIT). It was solved by Matthew B. Hastings [“Superadditivity of communication capacity using entangled inputs”, Nature Physics 5, 255–257 (2009; )] in the one-shot case by exhibiting a pair of random quantum channels. …