Dynamics of the Ising Spin-Glass Model in a Transverse Field

Abstract

We use quantum Monte Carlo methods and various analytic approximations to solve the Ising spin-glass model in a transverse field in the disordered phase. We focus on the behavior of the frequency dependent susceptibility of the system above and below the critical field . We establish the existence of an exact equivalence between this problem and the single-impurity Kondo model at the quantum critical point. Our predictions for the long-time dynamics of the model are in good agreement with experimental results on $LiH{o}_{0.167}{Y}_{0.833}{F}_4$.

4 pages Latex. 2 postscript figures

References in corpus (1)

• Scaling and universality in the anisotropic Kondo model and the dissipative two-state system

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