Blurred quantum Darwinism across quantum reference frames

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,...

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Bibliographic Details
Published in:arXiv.org 2021-01
Main Authors: Le, Thao P, Mironowicz, Piotr, Horodecki, Paweł
Format: Article
Language:English
Subjects:
Alliances
Entanglement
Objectivity
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2006.06364