Generic emergence of classical features in quantum Darwinism

Fernando Brandão; Marco Piani; Paweł Horodecki

doi:10.1038/ncomms8908

Generic emergence of classical features in quantum Darwinism

Abstract

Quantum Darwinism posits that only specific information about a quantum system that is redundantly proliferated to many parts of its environment becomes accessible and objective, leading to the emergence of classical reality. However, it is not clear under what conditions this mechanism holds true. Here we prove that the emergence of classical features along the lines of quantum Darwinism is a general feature of any quantum dynamics: observers who acquire information indirectly through the environment have effective access at most to classical information about one and the same measurement of the quantum system. Our analysis does not rely on a strict conceptual splitting between a system-of-interest and its environment, and allows one to interpret any system as part of the environment of any other system. Finally, our approach leads to a full operational characterization of quantum discord in terms of local redistribution of correlations.

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Authors (3)

Fernando Brandão
- University College London CS Department
Marco Piani
- University of Strathclyde Department of Physics
Paweł Horodecki prof. dr hab.

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: Nature Communications no. 6, pages 1 - 13,
ISSN: 2041-1723
Language:: English
Publication year:: 2015
Bibliographic description:: Brandão F., Piani M., Horodecki P.: Generic emergence of classical features in quantum Darwinism// Nature Communications. -Vol. 6, nr. 7908 (2015), s.1-13
DOI:: Digital Object Identifier (open in new tab) 10.1038/ncomms8908
Verified by:: Gdańsk University of Technology