Superconducting microwave resonators play a pivotal role in superconducting quantum circuits. The ability to fine-tune their resonant frequencies provides enhanced control and flexibility. Here, we introduce a frequency-tunable superconducting coplanar waveguide resonator. By applying electrical currents through specifically designed ground wires, we achieve the generation and control of a localized magnetic field on the central line of the resonator, enabling continuous tuning of its resonant frequency. We demonstrate a frequency tuning range of 54.85 MHz in a 6.21 GHz resonator. This integrated and tunable resonator holds great potential as a dynamically tunable filter and as a key component of communication buses and memory elements in superconducting quantum computing.
@article{arxiv.2405.09170,
title = {Tunable superconducting resonators via on-chip control of local magnetic field},
author = {Chen-Guang Wang and Wen-Cheng Yue and Xuecou Tu and Tianyuan Chi and Tingting Guo and Yang-Yang Lyu and Sining Dong and Chunhai Cao and Labao Zhang and Xiaoqing Jia and Guozhu Sun and Lin Kang and Jian Chen and Yong-Lei Wang and Huabing Wang and Peiheng Wu},
journal= {arXiv preprint arXiv:2405.09170},
year = {2024}
}