Broadband noise decoherence in solid-state complex architectures

TL;DR

This paper introduces a classification and systematic approach to modeling broadband noise in solid-state quantum systems, focusing on its effects rather than microscopic details, and applies it to a two-qubit gate.

Contribution

It presents a novel classification of broadband noise based on effects and a multi-stage modeling approach tailored for solid-state quantum gates.

Findings

Effective noise modeling for solid-state qubits

Application to a two-qubit gate demonstrates practical utility

Simplified environmental parametrization enhances analysis

Abstract

Broadband noise represents a severe limitation towards the implementation of a solid-state quantum information processor. Considering common spectral forms, we propose a classification of noise sources based on the effects produced instead of on their microscopic origin. We illustrate a multi-stage approach to broadband noise which systematically includes only the relevant information on the environment, out of the huge parametrization needed for a microscopic description. We apply this technique to a solid-state two-qubit gate in a fixed coupling implementation scheme.