2016/05/02 by Christian Majenz, Mario Berta, Frédéric Dupuis +2 · 1 citation
Chemistry · Computer Science · Physics and Astronomy · #Catalysis #Chemistry #Decoupling (probability) #Materials science #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum mechanics #quant-ph
paper · pdf · doi:10.1103/physrevlett.118.080503
published as Phys. Rev. Lett. 118, 080503 (2017) · 6+16 pages, 1 figure
arxiv created 2016/05/02 · openalex publication_date 2017/02/23 · arxiv updated 2017/03/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The decoupling technique is a fundamental tool in quantum information theory with applications ranging from thermodynamics to many-body physics and black hole radiation whereby a quantum system is decoupled from another one by discarding an appropriately chosen part of it. Here, we introduce catalytic decoupling, i.e., decoupling with the help of an independent system. Thereby, we remove a restriction on the standard decoupling notion and present a tight characterization in terms of the max-mutual information. The novel notion unifies various tasks and leads to a resource theory of decoupling.