Scaling and Universality in the Anisotropic Kondo Model and the Dissipative Two-State System

T. A. Costi
Phys. Rev. Lett. 80, 1038 – Published 2 February 1998
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Abstract

Scaling and universality in the Ohmic two-state system is investigated by exploiting the equivalence of this model to the anisotropic Kondo model. For the Ohmic two-state system, we find universal scaling functions for the specific heat Cα(T), static susceptibility χα(T), and spin relaxation function Sα(ω), depending on the reduced temperature T/Δr (frequency ω/Δr), with Δr the renormalized tunneling frequency, and uniquely specified by the dissipation strength α ( 0<α<1). The scaling functions can be used to extract α and Δr in experimental realizations.

  • Received 6 June 1997

DOI:https://doi.org/10.1103/PhysRevLett.80.1038

©1998 American Physical Society

Authors & Affiliations

T. A. Costi

  • Universität Karlsruhe, Institut für Theorie der Kondensierten Materie, 76128 Karlsruhe, Germany

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Vol. 80, Iss. 5 — 2 February 1998

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