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Blurred quantum Darwinism across quantum reference frames

Abstract

Quantum Darwinism describes objectivity of quantum systems via their correlations with their environment--information that hypothetical observers can recover by measuring the environments. However, observations are done with respect to a frame of reference. Here, we take the formalism of [Giacomini, Castro-Ruiz, & Brukner. Nat Commun 10, 494 (2019)], and consider the repercussions on objectivity when changing quantum reference frames. We find that objectivity depends on non-degenerative relative separations, conditional state localisation, and environment macro-fractions. There is different objective information in different reference frames due to the interchangeability of entanglement and coherence, and of statistical mixing and classical correlations. As such, objectivity is subjective across quantum reference frames.

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Copyright (2020 American Physical Society)

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
PHYSICAL REVIEW A no. 102,
ISSN: 2469-9926
Language:
English
Publication year:
2020
Bibliographic description:
Le T. P., Mironowicz P., Horodecki P.: Blurred quantum Darwinism across quantum reference frames// PHYSICAL REVIEW A -Vol. 102,iss. 6 (2020), s.062420-
DOI:
Digital Object Identifier (open in new tab) 10.1103/physreva.102.062420
Verified by:
Gdańsk University of Technology

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