Effects of dissipation on disordered quantum spin models

2003/12/02 by Leticia F. Cugliandolo, L. F. Cugliandolo, D. R. Grempel +2
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Theoretical and Computational Physics #cond-mat.dis-nn #cond-mat.stat-mech

paper · pdf · doi:10.1103/physrevb.70.024422

published as Phys. Rev. B 70, 024422 (2004). · 24 pages, 8 figs

arxiv created 2003/12/02 · openalex publication_date 2004/07/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the effects of the coupling to an Ohmic quantum environment on the static and dynamical properties of a class of disordered spin models in a transverse magnetic field using a method of direct spin summation. We discuss the influence of the environment on various features of the phase diagram of the models as well as on the stability of the possible phases.

Citations

• Dynamical study of the disordered quantump=2spherical model
• Quantum tunnelling in a dissipative system
• Variational theory of elastic manifolds with correlated disorder and localization of interacting quantum particles
• Dynamics of the dissipative two-state system