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Abstract:

We study the zero-temperature static properties of dissipative ensembles of quantum Ising spins arranged on periodic one-dimensional finite clusters and on an infinite chain. The spins interact ferro-magnetically with nearest-neighbor pure and random couplings. They are subject to a transverse field and coupled to an Ohmic bath of quantum harmonic oscillators. We analyze the coupled system using Monte Carlo simulations of the classical two-dimensional counterpart model. The coupling to the bath enhances the extent of the ordered phase, as found in mean-field spin glasses. In the case of finite clusters, we show that a generalization of the Caldeira-Leggett localization transition exists. In the case of the infinite random chain, we study the effect of dissipation on the transition and the Griffiths phase. © 2005 The American Physical Society.

Registro:

Documento: Artículo
Título:Static properties of the dissipative random quantum Ising ferromagnetic chain
Autor:Cugliandolo, L.F.; Lozano, G.S.; Lozza, H.
Filiación:Laboratoire de Physique Théorique et Hautes Énergies, Jussieu, 4 place Jussieu, 75252 Paris Cedex 05, France
Laboratoire de Physique Théorique, École Normale Supérieure de Paris, 24 rue Lhomond, 75231 Paris Cedex 05, France
Departamento de Física, Universidad de Buenos Aires, Ciudad Universitaria 1428, Argentina
Año:2005
Volumen:71
Número:22
DOI: http://dx.doi.org/10.1103/PhysRevB.71.224421
Título revista:Physical Review B - Condensed Matter and Materials Physics
Título revista abreviado:Phys. Rev. B Condens. Matter Mater. Phys.
ISSN:10980121
CODEN:PRBMD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v71_n22_p_Cugliandolo

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Citas:

---------- APA ----------
Cugliandolo, L.F., Lozano, G.S. & Lozza, H. (2005) . Static properties of the dissipative random quantum Ising ferromagnetic chain. Physical Review B - Condensed Matter and Materials Physics, 71(22).
http://dx.doi.org/10.1103/PhysRevB.71.224421
---------- CHICAGO ----------
Cugliandolo, L.F., Lozano, G.S., Lozza, H. "Static properties of the dissipative random quantum Ising ferromagnetic chain" . Physical Review B - Condensed Matter and Materials Physics 71, no. 22 (2005).
http://dx.doi.org/10.1103/PhysRevB.71.224421
---------- MLA ----------
Cugliandolo, L.F., Lozano, G.S., Lozza, H. "Static properties of the dissipative random quantum Ising ferromagnetic chain" . Physical Review B - Condensed Matter and Materials Physics, vol. 71, no. 22, 2005.
http://dx.doi.org/10.1103/PhysRevB.71.224421
---------- VANCOUVER ----------
Cugliandolo, L.F., Lozano, G.S., Lozza, H. Static properties of the dissipative random quantum Ising ferromagnetic chain. Phys. Rev. B Condens. Matter Mater. Phys. 2005;71(22).
http://dx.doi.org/10.1103/PhysRevB.71.224421