Noise representations of open system dynamics

Abstract We analyze the conditions under which the dynamics of a quantum system open to a given environment can be simulated with an external noisy field that is a surrogate for the environmental degrees of freedom. We show that such a field is either a subjective or an objective surrogate; the form...

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Autores principales:	Piotr Szańkowski, Łukasz Cywiński
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/499e9ebe25a444bcac41fe6b6715b234
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spelling	oai:doaj.org-article:499e9ebe25a444bcac41fe6b6715b2342021-12-02T13:34:00ZNoise representations of open system dynamics10.1038/s41598-020-78079-72045-2322https://doaj.org/article/499e9ebe25a444bcac41fe6b6715b2342020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78079-7https://doaj.org/toc/2045-2322Abstract We analyze the conditions under which the dynamics of a quantum system open to a given environment can be simulated with an external noisy field that is a surrogate for the environmental degrees of freedom. We show that such a field is either a subjective or an objective surrogate; the former is capable of simulating the dynamics only for the specific system–environment arrangement, while the latter is an universal simulator for any system interacting with the given environment. Consequently, whether the objective surrogate field exists and what are its properties is determined exclusively by the environment. Thus, we are able to formulate the sufficient criterion for the environment to facilitate its surrogate, and we identify a number of environment types that satisfy it. Finally, we discuss in what sense the objective surrogate field representation can be considered classical and we explain its relation to the formation of system–environment entanglement, and the back-action exerted by the system onto environment.Piotr SzańkowskiŁukasz CywińskiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-19 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Piotr Szańkowski Łukasz Cywiński Noise representations of open system dynamics
description	Abstract We analyze the conditions under which the dynamics of a quantum system open to a given environment can be simulated with an external noisy field that is a surrogate for the environmental degrees of freedom. We show that such a field is either a subjective or an objective surrogate; the former is capable of simulating the dynamics only for the specific system–environment arrangement, while the latter is an universal simulator for any system interacting with the given environment. Consequently, whether the objective surrogate field exists and what are its properties is determined exclusively by the environment. Thus, we are able to formulate the sufficient criterion for the environment to facilitate its surrogate, and we identify a number of environment types that satisfy it. Finally, we discuss in what sense the objective surrogate field representation can be considered classical and we explain its relation to the formation of system–environment entanglement, and the back-action exerted by the system onto environment.
format	article
author	Piotr Szańkowski Łukasz Cywiński
author_facet	Piotr Szańkowski Łukasz Cywiński
author_sort	Piotr Szańkowski
title	Noise representations of open system dynamics
title_short	Noise representations of open system dynamics
title_full	Noise representations of open system dynamics
title_fullStr	Noise representations of open system dynamics
title_full_unstemmed	Noise representations of open system dynamics
title_sort	noise representations of open system dynamics
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/499e9ebe25a444bcac41fe6b6715b234
work_keys_str_mv	AT piotrszankowski noiserepresentationsofopensystemdynamics AT łukaszcywinski noiserepresentationsofopensystemdynamics
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Noise representations of open system dynamics

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