Quantum impurity models of noisy qubits

TL;DR

This paper links noisy qubit models to impurity models in condensed matter physics, offering insights for engineering coherent multi-qubit systems for quantum computing.

Contribution

It establishes a theoretical connection between dissipative qubit models and impurity models, providing a framework for designing coherent multi-qubit assemblies.

Findings

Identifies the equivalence of noisy qubit models to impurity models in strongly correlated systems.

Provides recommendations for engineering highly coherent multi-qubit systems.

Enhances understanding of dissipation effects in quantum information processing.

Abstract

We demonstrate that the problem of coupled two-level systems ("qubits") which are also subject to a generic (sub)Ohmic dissipative environment belongs to the same class of models as those describing (non)magnetic impurities embedded in strongly correlated systems. A further insight into the generalized single- and two-impurity Bose/Fermi Kondo models enables one to make specific recommendations towards a systematic engineering of highly coherent multi-qubit assemblies for potential applications in quantum information processing.