Continuous-Time Monte Carlo study of the pseudogap Bose-Fermi Kondo model

TL;DR

This paper employs continuous-time quantum Monte Carlo to investigate the quantum critical behavior of the pseudogap Bose-Fermi Kondo model, addressing transformation issues and demonstrating the method's effectiveness at low temperatures.

Contribution

It introduces a CT-QMC approach to study the pseudogap Bose-Fermi Kondo model and discusses transformation nuances, enabling analysis of quantum criticality.

Findings

CT-QMC effectively probes quantum critical points at low temperatures.

Transformation from the Anderson to the Kondo model presents delicate issues.

The method reveals critical properties of the pseudogap Bose-Fermi Kondo model.

Abstract

We study the pseudogap Bose-Fermi Anderson model with a continuous-time quantum Monte Carlo (CT-QMC) method. We discuss some delicate aspects of the transformation from this model to the Bose-Fermi Kondo model. We show that the CT-QMC method can be used at sufficiently low temperatures to access the quantum critical properties of these models.