Roads to objectivity: Quantum Darwinism, Spectrum Broadcast Structures, and Strong quantum Darwinism – a review

J. K. Korbicz

Center for Theoretical Physics, Polish Academy of Sciences, 02-668 Warsaw, Poland

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Abstract

The problem of objectivity, i.e. how to explain on quantum grounds the objective character of the macroscopic world, is one of the aspects of the celebrated quantum-to-classical transition. Initiated by W. H. Zurek and collaborators, this problem gained some attention recently with several approaches being developed. The aim of this work is to compare three of them: quantum Darwinism, Spectrum Broadcast Structures, and strong quantum Darwinism. The paper is concentrated on foundations, providing a synthetic analysis of how the three approaches realize the idea of objectivity and how they are related to each other. As a byproduct of this analysis, a proof of a generalized Spectrum Broadcast Structure theorem is presented. Recent quantum Darwinism experiments are also briefly discussed.

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Cited by

[1] Carlo Maria Scandolo, Roberto Salazar, Jarosław K. Korbicz, and Paweł Horodecki, "Universal structure of objective states in all fundamental causal theories", arXiv:1805.12126.

[2] Akram Touil, Bin Yan, Davide Girolami, Sebastian Deffner, and Wojciech H. Zurek, "Eavesdropping on the Decohering Environment: Quantum Darwinism, Amplification, and the Origin of Objective Classical Reality", arXiv:2107.00035.

[3] Wojciech Hubert Zurek, "Emergence of the Classical from within the Quantum Universe", arXiv:2107.03378.

[4] Barış Çakmak, Özgür E. Müstecaplıoğlu, Mauro Paternostro, Bassano Vacchini, and Steve Campbell, "Quantum Darwinism in a Composite System: Objectivity versus Classicality", Entropy 23 8, 995 (2021).

[5] M. Kiciński and J. K. Korbicz, "Decoherence and objectivity in higher spin environments", Physical Review A 104 4, 042216 (2021).

[6] Damian Kwiatkowski, Łukasz Cywiński, and Jarosław K. Korbicz, "Appearance of objectivity for NV centers interacting with dynamically polarized nuclear environment", New Journal of Physics 23 4, 043036 (2021).

[7] Wilson S. Martins and Diogo O. Soares-Pinto, "Suppressing information storage in a structured thermal bath: Objectivity and non-Markovianity", arXiv:2110.03490.

[8] Akram Touil and Sebastian Deffner, "Environment-Assisted Shortcuts to Adiabaticity", Entropy 23 11, 1479 (2021).

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