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Dynamics of spin and density fluctuations in strongly interacting few-body systems

The decoupling of spin and density dynamics is a remarkable feature of quantum one-dimensional many-body systems. In a few-body regime, however, little is known about this phenomenon. To address this problem, we study the time evolution of a small system of strongly interacting fermions after a sudd...

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Autores principales: Barfknecht, Rafael Emilio, Foerster, Angela, Zinner, Nikolaj Thomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6831690/
https://www.ncbi.nlm.nih.gov/pubmed/31690841
http://dx.doi.org/10.1038/s41598-019-52392-2
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author Barfknecht, Rafael Emilio
Foerster, Angela
Zinner, Nikolaj Thomas
author_facet Barfknecht, Rafael Emilio
Foerster, Angela
Zinner, Nikolaj Thomas
author_sort Barfknecht, Rafael Emilio
collection PubMed
description The decoupling of spin and density dynamics is a remarkable feature of quantum one-dimensional many-body systems. In a few-body regime, however, little is known about this phenomenon. To address this problem, we study the time evolution of a small system of strongly interacting fermions after a sudden change in the trapping geometry. We show that, even at the few-body level, the excitation spectrum of this system presents separate signatures of spin and density dynamics. Moreover, we describe the effect of considering additional internal states with SU(N) symmetry, which ultimately leads to the vanishing of spin excitations in a completely balanced system.
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spelling pubmed-68316902019-11-13 Dynamics of spin and density fluctuations in strongly interacting few-body systems Barfknecht, Rafael Emilio Foerster, Angela Zinner, Nikolaj Thomas Sci Rep Article The decoupling of spin and density dynamics is a remarkable feature of quantum one-dimensional many-body systems. In a few-body regime, however, little is known about this phenomenon. To address this problem, we study the time evolution of a small system of strongly interacting fermions after a sudden change in the trapping geometry. We show that, even at the few-body level, the excitation spectrum of this system presents separate signatures of spin and density dynamics. Moreover, we describe the effect of considering additional internal states with SU(N) symmetry, which ultimately leads to the vanishing of spin excitations in a completely balanced system. Nature Publishing Group UK 2019-11-05 /pmc/articles/PMC6831690/ /pubmed/31690841 http://dx.doi.org/10.1038/s41598-019-52392-2 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Barfknecht, Rafael Emilio
Foerster, Angela
Zinner, Nikolaj Thomas
Dynamics of spin and density fluctuations in strongly interacting few-body systems
title Dynamics of spin and density fluctuations in strongly interacting few-body systems
title_full Dynamics of spin and density fluctuations in strongly interacting few-body systems
title_fullStr Dynamics of spin and density fluctuations in strongly interacting few-body systems
title_full_unstemmed Dynamics of spin and density fluctuations in strongly interacting few-body systems
title_short Dynamics of spin and density fluctuations in strongly interacting few-body systems
title_sort dynamics of spin and density fluctuations in strongly interacting few-body systems
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6831690/
https://www.ncbi.nlm.nih.gov/pubmed/31690841
http://dx.doi.org/10.1038/s41598-019-52392-2
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