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Quantum Non-Markovian Environment-to-System Backflows of Information: Nonoperational vs. Operational Approaches
Quantum memory effects can be qualitatively understood as a consequence of an environment-to-system backflow of information. Here, we analyze and compare how this concept is interpreted and implemented in different approaches to quantum non-Markovianity. We study a nonoperational approach, defined b...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9140462/ https://www.ncbi.nlm.nih.gov/pubmed/35626534 http://dx.doi.org/10.3390/e24050649 |
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author | Budini, Adrián A. |
author_facet | Budini, Adrián A. |
author_sort | Budini, Adrián A. |
collection | PubMed |
description | Quantum memory effects can be qualitatively understood as a consequence of an environment-to-system backflow of information. Here, we analyze and compare how this concept is interpreted and implemented in different approaches to quantum non-Markovianity. We study a nonoperational approach, defined by the distinguishability between two system states characterized by different initial conditions, and an operational approach, which is defined by the correlation between different outcomes associated to successive measurement processes performed over the system of interest. The differences, limitations, and vantages of each approach are characterized in detail by considering diverse system–environment models and dynamics. As a specific example, we study a non-Markovian depolarizing map induced by the interaction of the system of interest with an environment characterized by incoherent and coherent self-dynamics. |
format | Online Article Text |
id | pubmed-9140462 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-91404622022-05-28 Quantum Non-Markovian Environment-to-System Backflows of Information: Nonoperational vs. Operational Approaches Budini, Adrián A. Entropy (Basel) Article Quantum memory effects can be qualitatively understood as a consequence of an environment-to-system backflow of information. Here, we analyze and compare how this concept is interpreted and implemented in different approaches to quantum non-Markovianity. We study a nonoperational approach, defined by the distinguishability between two system states characterized by different initial conditions, and an operational approach, which is defined by the correlation between different outcomes associated to successive measurement processes performed over the system of interest. The differences, limitations, and vantages of each approach are characterized in detail by considering diverse system–environment models and dynamics. As a specific example, we study a non-Markovian depolarizing map induced by the interaction of the system of interest with an environment characterized by incoherent and coherent self-dynamics. MDPI 2022-05-05 /pmc/articles/PMC9140462/ /pubmed/35626534 http://dx.doi.org/10.3390/e24050649 Text en © 2022 by the author. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Budini, Adrián A. Quantum Non-Markovian Environment-to-System Backflows of Information: Nonoperational vs. Operational Approaches |
title | Quantum Non-Markovian Environment-to-System Backflows of Information: Nonoperational vs. Operational Approaches |
title_full | Quantum Non-Markovian Environment-to-System Backflows of Information: Nonoperational vs. Operational Approaches |
title_fullStr | Quantum Non-Markovian Environment-to-System Backflows of Information: Nonoperational vs. Operational Approaches |
title_full_unstemmed | Quantum Non-Markovian Environment-to-System Backflows of Information: Nonoperational vs. Operational Approaches |
title_short | Quantum Non-Markovian Environment-to-System Backflows of Information: Nonoperational vs. Operational Approaches |
title_sort | quantum non-markovian environment-to-system backflows of information: nonoperational vs. operational approaches |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9140462/ https://www.ncbi.nlm.nih.gov/pubmed/35626534 http://dx.doi.org/10.3390/e24050649 |
work_keys_str_mv | AT budiniadriana quantumnonmarkovianenvironmenttosystembackflowsofinformationnonoperationalvsoperationalapproaches |