Bose-Fermi Kondo model with Ising anisotropy: cluster-Monte Carlo approach

Abstract

The Bose-Fermi Kondo model captures the physics of the destruction of Kondo screening, which is of extensive current interest to the understanding of quantum critical heavy fermion metals. There are presently limited theoretical methods to study the finite temperature properties of the Bose-Fermi Kondo model. Here we provide some of the consistency checks on the cluster-Monte Carlo method, which we have recently applied to the Ising-anisotropic Bose-Fermi Kondo model. We show that the method correctly captures the scaling properties of the Kondo phase, as well as those on approach to the Kondo-destroying quantum critical point. We establish that comparable results are obtained when the Kondo couplings are placed at or away from a Toulouse point.

arXiv comment2 pages, 2 figures, to appear in the proceedings of SCES 07 (the international conference on strongly correlated electron systems 2007)

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Cited by in corpus (5)

• Quantum Criticality out of Equilibrium: Steady State in a Magnetic Single-Electron Transistor
• Scaling and Enhanced Symmetry at the Quantum Critical Point of the Sub-Ohmic Bose-Fermi Kondo Model
• Spin Path Integrals, Berry phase, and the Quantum Phase Transition in the sub-Ohmic Spin-boson Model
• On the concept of effective temperature in current carrying quantum critical states
• Impurity-Induced Environmental Quantum Phase Transitions in the Quadratic-Coupling Spin-Boson Model