Glassy Dynamics in a Disordered Heisenberg Quantum Spin System

Understanding the dynamics of strongly interacting disordered quantum systems is one of the most challenging problems in modern science, due to features such as the breakdown of thermalization and the emergence of glassy phases of matter. We report on the observation of anomalous relaxation dynamics...

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Autores principales:	A. Signoles, T. Franz, R. Ferracini Alves, M. Gärttner, S. Whitlock, G. Zürn, M. Weidemüller
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/4f9bd84e40f54298a565d814e30e815d
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spelling	oai:doaj.org-article:4f9bd84e40f54298a565d814e30e815d2021-12-02T13:27:27ZGlassy Dynamics in a Disordered Heisenberg Quantum Spin System10.1103/PhysRevX.11.0110112160-3308https://doaj.org/article/4f9bd84e40f54298a565d814e30e815d2021-01-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.011011http://doi.org/10.1103/PhysRevX.11.011011https://doaj.org/toc/2160-3308Understanding the dynamics of strongly interacting disordered quantum systems is one of the most challenging problems in modern science, due to features such as the breakdown of thermalization and the emergence of glassy phases of matter. We report on the observation of anomalous relaxation dynamics in an isolated XXZ quantum spin system realized by an ultracold gas of atoms initially prepared in a superposition of two different Rydberg states. The total magnetization is found to exhibit subexponential relaxation analogous to classical glassy dynamics, but in the quantum case this relaxation originates from the buildup of nonclassical correlations. In both experiment and semiclassical simulations, we find the evolution toward a randomized state is independent of the strength of disorder up to a critical value. This hints toward a unifying description of relaxation dynamics in disordered isolated quantum systems, analogous to the generalization of statistical mechanics to out-of-equilibrium scenarios in classical spin glasses.A. SignolesT. FranzR. Ferracini AlvesM. GärttnerS. WhitlockG. ZürnM. WeidemüllerAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 1, p 011011 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 A. Signoles T. Franz R. Ferracini Alves M. Gärttner S. Whitlock G. Zürn M. Weidemüller Glassy Dynamics in a Disordered Heisenberg Quantum Spin System
description	Understanding the dynamics of strongly interacting disordered quantum systems is one of the most challenging problems in modern science, due to features such as the breakdown of thermalization and the emergence of glassy phases of matter. We report on the observation of anomalous relaxation dynamics in an isolated XXZ quantum spin system realized by an ultracold gas of atoms initially prepared in a superposition of two different Rydberg states. The total magnetization is found to exhibit subexponential relaxation analogous to classical glassy dynamics, but in the quantum case this relaxation originates from the buildup of nonclassical correlations. In both experiment and semiclassical simulations, we find the evolution toward a randomized state is independent of the strength of disorder up to a critical value. This hints toward a unifying description of relaxation dynamics in disordered isolated quantum systems, analogous to the generalization of statistical mechanics to out-of-equilibrium scenarios in classical spin glasses.
format	article
author	A. Signoles T. Franz R. Ferracini Alves M. Gärttner S. Whitlock G. Zürn M. Weidemüller
author_facet	A. Signoles T. Franz R. Ferracini Alves M. Gärttner S. Whitlock G. Zürn M. Weidemüller
author_sort	A. Signoles
title	Glassy Dynamics in a Disordered Heisenberg Quantum Spin System
title_short	Glassy Dynamics in a Disordered Heisenberg Quantum Spin System
title_full	Glassy Dynamics in a Disordered Heisenberg Quantum Spin System
title_fullStr	Glassy Dynamics in a Disordered Heisenberg Quantum Spin System
title_full_unstemmed	Glassy Dynamics in a Disordered Heisenberg Quantum Spin System
title_sort	glassy dynamics in a disordered heisenberg quantum spin system
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/4f9bd84e40f54298a565d814e30e815d
work_keys_str_mv	AT asignoles glassydynamicsinadisorderedheisenbergquantumspinsystem AT tfranz glassydynamicsinadisorderedheisenbergquantumspinsystem AT rferracinialves glassydynamicsinadisorderedheisenbergquantumspinsystem AT mgarttner glassydynamicsinadisorderedheisenbergquantumspinsystem AT swhitlock glassydynamicsinadisorderedheisenbergquantumspinsystem AT gzurn glassydynamicsinadisorderedheisenbergquantumspinsystem AT mweidemuller glassydynamicsinadisorderedheisenbergquantumspinsystem
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Glassy Dynamics in a Disordered Heisenberg Quantum Spin System

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