Kondo physics in a dissipative environment

TL;DR

This paper investigates the complex quantum-critical behavior of a spin-1/2 system interacting with both a pseudogap fermionic environment and a dissipative bosonic bath, revealing insights into the interplay of Kondo physics and dissipation.

Contribution

It provides nonperturbative results on quantum-critical behavior in a Bose-Fermi Kondo model with a pseudogap and dissipative environment, advancing understanding of strongly correlated systems.

Findings

Quantum-critical behavior characterized nonperturbatively.

Interplay between Kondo effect and dissipation elucidated.

Model serves as a paradigm for correlated systems with dissipation.

Abstract

We report nonperturbative results for the interacting quantum-critical behavior in a Bose-Fermi Kondo model describing a spin-1/2 coupled both to a fermionic band with a pseudogap density of states and to a dissipative bosonic bath. The model serves as a paradigm for studying the interplay between Kondo physics and low-energy dissipative modes in strongly correlated systems.