Dissipative effects on quantum glassy systems

We discuss the behavior of a quantum glassy system coupled to a bath of quantum oscillators. We show that the system localizes in the absence of interactions when coupled to a sub-Ohmic bath. When interactions are switched on localization disappears and the system undergoes a phase transition toward...

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Autores principales: Cugliandolo, L. F., Grempel, D. R., Lozano, G., Lozza, H., da Silva Santos, C. A.
Formato: JOUR
Materias:
glass
article
dynamics
electric resistance
electricity
oscillation
phase transition
quantum mechanics
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01631829_v66_n1_p144441_Cugliandolo
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01631829_v66_n1_p144441_Cugliandolo
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spelling todo:paper_01631829_v66_n1_p144441_Cugliandolo2023-10-03T15:01:55Z Dissipative effects on quantum glassy systems Cugliandolo, L. F. Cugliandolo, L. F. Grempel, D. R. Lozano, G. Lozza, H. da Silva Santos, C. A. glass article dynamics electric resistance electricity oscillation phase transition quantum mechanics We discuss the behavior of a quantum glassy system coupled to a bath of quantum oscillators. We show that the system localizes in the absence of interactions when coupled to a sub-Ohmic bath. When interactions are switched on localization disappears and the system undergoes a phase transition towards a glassy phase. We show that the position of the critical line separating the disordered and ordered phases strongly depends on the coupling to the bath. For a given type of bath, the ordered glassy phase is favored by a stronger coupling. Ohmic, sub-Ohmic, and super-Ohmic baths lead to different transition lines. We draw our conclusions from analysis of the partition function using the replicated imaginary-time formalism and from the study of the real-time dynamics of the coupled system using the Schwinger-Keldysh closed time-path formalism. Fil:Lozza, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01631829_v66_n1_p144441_Cugliandolo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic glass
article
dynamics
electric resistance
electricity
oscillation
phase transition
quantum mechanics
spellingShingle glass
article
dynamics
electric resistance
electricity
oscillation
phase transition
quantum mechanics
Cugliandolo, L. F.
Cugliandolo, L. F.
Grempel, D. R.
Lozano, G.
Lozza, H.
da Silva Santos, C. A.
Dissipative effects on quantum glassy systems
topic_facet glass
article
dynamics
electric resistance
electricity
oscillation
phase transition
quantum mechanics
description We discuss the behavior of a quantum glassy system coupled to a bath of quantum oscillators. We show that the system localizes in the absence of interactions when coupled to a sub-Ohmic bath. When interactions are switched on localization disappears and the system undergoes a phase transition towards a glassy phase. We show that the position of the critical line separating the disordered and ordered phases strongly depends on the coupling to the bath. For a given type of bath, the ordered glassy phase is favored by a stronger coupling. Ohmic, sub-Ohmic, and super-Ohmic baths lead to different transition lines. We draw our conclusions from analysis of the partition function using the replicated imaginary-time formalism and from the study of the real-time dynamics of the coupled system using the Schwinger-Keldysh closed time-path formalism.
format JOUR
author Cugliandolo, L. F.
Cugliandolo, L. F.
Grempel, D. R.
Lozano, G.
Lozza, H.
da Silva Santos, C. A.
author_facet Cugliandolo, L. F.
Cugliandolo, L. F.
Grempel, D. R.
Lozano, G.
Lozza, H.
da Silva Santos, C. A.
author_sort Cugliandolo, L. F.
title Dissipative effects on quantum glassy systems
title_short Dissipative effects on quantum glassy systems
title_full Dissipative effects on quantum glassy systems
title_fullStr Dissipative effects on quantum glassy systems
title_full_unstemmed Dissipative effects on quantum glassy systems
title_sort dissipative effects on quantum glassy systems
url http://hdl.handle.net/20.500.12110/paper_01631829_v66_n1_p144441_Cugliandolo
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AT grempeldr dissipativeeffectsonquantumglassysystems
AT lozanog dissipativeeffectsonquantumglassysystems
AT lozzah dissipativeeffectsonquantumglassysystems
AT dasilvasantosca dissipativeeffectsonquantumglassysystems
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