Zero-temperature phase diagram of dissipative random ising ferromagnetic chains

We study the zero-temperature critical behavior of dissipative quantum Ising spin chains of finite and infinite length. The spins interact with either constant or random nearest-neighbor ferro-magnetic couplings. They are also subject to a transverse field and coupled to an Ohmic bath of quantum har...

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Detalles Bibliográficos
Autor principal: Lozza, Homero Fernando
Publicado: 2006
Materias:
Dissipation
Quantum Monte Carlo
Spin chains
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02179792_v20_n30-31_p5219_Cugliandolo
http://hdl.handle.net/20.500.12110/paper_02179792_v20_n30-31_p5219_Cugliandolo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_02179792_v20_n30-31_p5219_Cugliandolo
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spelling paper:paper_02179792_v20_n30-31_p5219_Cugliandolo2025-07-30T17:59:37Z Zero-temperature phase diagram of dissipative random ising ferromagnetic chains Lozza, Homero Fernando Dissipation Quantum Monte Carlo Spin chains We study the zero-temperature critical behavior of dissipative quantum Ising spin chains of finite and infinite length. The spins interact with either constant or random nearest-neighbor ferro-magnetic couplings. They are also subject to a transverse field and coupled to an Ohmic bath of quantum harmonic oscillators. We analyze the coupled system performing Monte Carlo simulations on a classical two-dimensional counterpart model. We find that the coupling to the bath enhances the extent of the ordered phase, as it is known for mean-field spin-glass models. In the case of finite chains we show that a generalization of the Caldeira-Leggett localization transition exists. © World Scientific Publishing Company. Fil:Lozza, H.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02179792_v20_n30-31_p5219_Cugliandolo http://hdl.handle.net/20.500.12110/paper_02179792_v20_n30-31_p5219_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 Dissipation
Quantum Monte Carlo
Spin chains
spellingShingle Dissipation
Quantum Monte Carlo
Spin chains
Lozza, Homero Fernando
Zero-temperature phase diagram of dissipative random ising ferromagnetic chains
topic_facet Dissipation
Quantum Monte Carlo
Spin chains
description We study the zero-temperature critical behavior of dissipative quantum Ising spin chains of finite and infinite length. The spins interact with either constant or random nearest-neighbor ferro-magnetic couplings. They are also subject to a transverse field and coupled to an Ohmic bath of quantum harmonic oscillators. We analyze the coupled system performing Monte Carlo simulations on a classical two-dimensional counterpart model. We find that the coupling to the bath enhances the extent of the ordered phase, as it is known for mean-field spin-glass models. In the case of finite chains we show that a generalization of the Caldeira-Leggett localization transition exists. © World Scientific Publishing Company.
author Lozza, Homero Fernando
author_facet Lozza, Homero Fernando
author_sort Lozza, Homero Fernando
title Zero-temperature phase diagram of dissipative random ising ferromagnetic chains
title_short Zero-temperature phase diagram of dissipative random ising ferromagnetic chains
title_full Zero-temperature phase diagram of dissipative random ising ferromagnetic chains
title_fullStr Zero-temperature phase diagram of dissipative random ising ferromagnetic chains
title_full_unstemmed Zero-temperature phase diagram of dissipative random ising ferromagnetic chains
title_sort zero-temperature phase diagram of dissipative random ising ferromagnetic chains
publishDate 2006
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02179792_v20_n30-31_p5219_Cugliandolo
http://hdl.handle.net/20.500.12110/paper_02179792_v20_n30-31_p5219_Cugliandolo
work_keys_str_mv AT lozzahomerofernando zerotemperaturephasediagramofdissipativerandomisingferromagneticchains
_version_ 1840327861355937792

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