Tunable frequency conversion and comb generation with a superconducting artificial atom
Abstract
We investigate the power spectral density emitted by a superconducting artificial atom coupled to the end of a semi-infinite transmission line and driven by two continuous radio-frequency fields. In this setup, we observe the generation of multiple frequency peaks and the formation of frequency combs with equal detuning between those peaks. The frequency peaks originate from wave mixing of the drive fields, mediated by the artificial atom, highlighting the potential of this system as both a frequency converter and a frequency-comb generator. We demonstrate precise control and tunability in generating these frequency features, aligning well with theoretical predictions, across a relatively wide frequency range (tens of MHz, exceeding the linewidth of the artificial atom). The extensive and simple tunability of this frequency converter and comb generator, combined with its small physical footprint, makes it promising for quantum optics on chips and other applications in quantum technology.
Cite
@article{arxiv.2510.26749,
title = {Tunable frequency conversion and comb generation with a superconducting artificial atom},
author = {Fahad Aziz and Zhengqi Niu and Tzu-Yen Hsieh and Kuan Ting Lin and Yu-Huan Huang and Yen-Hsiang Lin and Ching-Yeh Chen and Yu-Ting Cheng and Kai-Min Hsieh and Jeng-Chung Chen and Anton Frisk Kockum and Guin-Dar Lin and Zhi-Rong Lin and Ping-Yi Wen and Io-Chun Hoi},
journal= {arXiv preprint arXiv:2510.26749},
year = {2025}
}