Catalytic decoupling of quantum information
File(s)
Accepted version
Author(s)
Majenz, C
Berta, M
Dupuis, F
Renner, R
Christandl, M
Type
Journal Article
Abstract
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.
Date Issued
2017-02-24
Date Acceptance
2017-02-01
Citation
Physical Review Letters, 2017, 118 (8)
ISSN
0031-9007
Publisher
American Physical Society
Journal / Book Title
Physical Review Letters
Volume
118
Issue
8
Copyright Statement
© 2017 American Physical Society.
Subjects
quant-ph
02 Physical Sciences
General Physics
Publication Status
Published
Article Number
080503
Date Publish Online
2017-02-23