Catalytic Decoupling of Quantum Information

Research output: Contribution to journalJournal articleResearchpeer-review

The decoupling technique is a fundamental tool in quantum information theory with applications ranging from quantum thermodynamics to quantum many body physics to the study of black hole radiation. In this work we introduce the notion of catalytic decoupling, that is, decoupling in the presence of an uncorrelated ancilla system. This removes a restriction on the standard notion of decoupling, which becomes important for structureless resources, and yields a tight characterization in terms of the max-mutual information. Catalytic decoupling naturally unifies various tasks like the erasure of correlations and quantum state merging, and leads to a resource theory of decoupling.
Original languageEnglish
Article number080503
JournalPhysical Review Letters
Volume118
Issue number8
Number of pages6
ISSN0031-9007
DOIs
Publication statusPublished - 10 Jan 2017

Links

ID: 172488930