Chain Rule for the Quantum Relative Entropy

• Published in: Physical review letters Vol. 124; no. 10; p. 100501
• Main Authors: Fang, Kun, Fawzi, Omar, Renner, Renato, Sutter, David
• Format: Journal Article
• Language: English
• Published: United States 13.03.2020

The chain rule for the classical relative entropy ensures that the relative entropy between probability distributions on multipartite systems can be decomposed into a sum of relative entropies of suitably chosen conditional distributions on the individual systems. Here, we prove a chain rule inequal...