Physical Review AGibbs Inequality in Quantum Statistical MechanicsLudwig W. Bruch, Harold FalkPublished Oct 1, 1970• 6 citationsPublisherAbstractThe only if aspect of a quantum form of a Gibbs inequality is proved.Received 4 May 1970DOI:https://doi.org/10.1103/PhysRevA.2.1598©1970 American Physical SocietyDOI10.1103/physreva.2.1598