Dissipative effects on quantum glassy systems

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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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Autor principal: Cugliandolo, L. F.
Otros Autores: Grempel, D. R., Lozano, G., Lozza, H., da Silva Santos, C. A.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2002
Acceso en línea:Registro en Scopus
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100 1 |a Cugliandolo, L. F. 
245 1 0 |a Dissipative effects on quantum glassy systems 
260 |c 2002 
506 |2 openaire  |e Política editorial 
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520 3 |a 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.  |l eng 
593 |a Laboratoire de Physique Théorique de l’École Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France 
593 |a Laboratoire de Physique Théorique et Hautes Énergies, Jussieu 1er étage, Tour 16 4 Place Jussieu, 75252 Paris Cedex 05, France 
593 |a CEA-Saclay/SPCSI, 91191 Gif-sur-Yvette CEDEX, France 
593 |a Departamento de Física, FCEyN, Universidad de Buenos Aires, Pabellón I, Ciudad Universitaria, 1428 Buenos Aires, Argentina 
593 |a Instituto Carlos I de Física Teórica y Computational, Universidad de Granada, E-18071 Granada, Spain 
690 1 0 |a GLASS 
690 1 0 |a ARTICLE 
690 1 0 |a DYNAMICS 
690 1 0 |a ELECTRIC RESISTANCE 
690 1 0 |a ELECTRICITY 
690 1 0 |a OSCILLATION 
690 1 0 |a PHASE TRANSITION 
690 1 0 |a QUANTUM MECHANICS 
700 1 |a Cugliandolo, L. F. 
700 1 |a Grempel, D. R. 
700 1 |a Lozano, G. 
700 1 |a Lozza, H. 
700 1 |a da Silva Santos, C. A. 
773 0 |d 2002  |g v. 66  |h pp. 144441-1444420  |k n. 1  |p Phys. Rev. B Condens. Matter Mater. Phys.  |x 01631829  |w (AR-BaUEN)CENRE-397  |t Physical Review B - Condensed Matter and Materials Physics 
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856 4 0 |u https://doi.org/10.1103/PhysRevB.66.014444  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_01631829_v66_n1_p144441_Cugliandolo  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v66_n1_p144441_Cugliandolo  |y Registro en la Biblioteca Digital 
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