Tunable frequency conversion and comb generation with a superconducting artificial atom
Journal
Applied Physics Letters
Journal Volume
129
Journal Issue
1
Start Page
014002
ISSN
0003-6951
1077-3118
Date Issued
2026-07-06
Author(s)
Aziz, Fahad
Niu, Zhengqi
Hsieh, Tzu-Yen
Lin, Kuan Ting
Huang, Yu-Huan
Lin, Yen-Hsiang
Chen, Ching-Yeh
Cheng, Yu-Ting
Hsieh, Kai-Min
Chen, Jeng-Chung
Kockum, Anton Frisk
Lin, Zhi-Rong
Wen, Ping-Yi
Hoi, Io-Chun
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.
Publisher
AIP Publishing
Type
journal article