On Mutual Information in Multipartite Quantum States and Equality in Strong Subadditivity of Entropy

Abstract

The challenge of equality in the strong subadditivity inequality of entropy is approached via a general additivity of correlation information in terms of nonoverlapping clusters of subsystems in multipartite states (density operators). A family of tripartite states satisfying equality is derived.

8 pages; Latex2e and Revtex4

References in corpus (3)

• Inequalities for Quantum Entropy: A Review with Conditions for Equality
• Mixed-state twin observables
• The role of coherence entropy of physical twin observables in entanglement

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