Analysis of the spectroscopy of a hybrid system composed of a superconducting flux qubit and diamond NV centers

TL;DR

This paper develops a new analysis method for the spectroscopy of a hybrid quantum system combining a superconducting flux qubit and diamond NV centers, effectively modeling the power broadening effects observed under strong driving conditions.

Contribution

A novel approach to analyze strongly driven hybrid quantum systems, accurately reproducing spectra with power broadening effects.

Findings

Successfully modeled power broadening in the hybrid system

Provided an efficient analysis method for strong driving conditions

Enhanced understanding of the system's spectral properties

Abstract

A hybrid system that combines the advantages of a superconducting flux qubit and an electron spin ensemble in diamond is one of the promising devices to realize quantum information processing. Exploring the properties of the superconductor diamond system is essential for the efficient use of this device. When we perform spectroscopy of this system, significant power broadening is observed. However, previous models to describe this system are known to be applicable only when the power broadening is negligible. Here, we construct a new approach to analyze this system with strong driving, and succeed to reproduce the spectrum with the power broadening. Our results provide an efficient way to analyze this hybrid system.