Catalytic decoupling of quantum information
| Autor: | Christian Majenz, Mario Berta, Renato Renner, Matthias Christandl, Frédéric Dupuis |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Quantum Physics General Physics 02 Physical Sciences General Physics and Astronomy FOS: Physical sciences Ranging Decoupling (cosmology) 01 natural sciences 010305 fluids & plasmas Theoretical physics quant-ph Quantum mechanics 0103 physical sciences Quantum system Quantum information 010306 general physics Quantum Physics (quant-ph) Hawking radiation |
| Zdroj: | Physical Review Letters, 118 (8) Physical Review Letters, 118 |
| ISSN: | 0031-9007 |
| Popis: | 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. 6+16 pages, 1 figure |
| Databáze: | OpenAIRE |
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