Voltage-tunable superconductor-semiconductor devices offer a unique platform to realize dynamic tunability in superconducting quantum circuits. By galvanically connecting a gated InAs-Al Josephson junction to a coplanar waveguide resonator, we demonstrate the use of a wide-range gate-tunable superconducting element. We show that the resonant frequency is controlled via a gate-tunable Josephson inductance and that the non-linearity of the voltage-controlled InAs-Al junction is non-dissipative as is the case with conventional Al-AlOx junctions. As the gate voltage is decreased, the inductive participation of the junction increases up to 44%, resulting in the resonant frequency being tuned by over 2 GHz. Utilizing the wide tunability of the device, we demonstrate that two resonant modes can be adjusted such that they strongly hybridize, exhibiting an avoided level crossing with a coupling strength of 51 MHz. Implementing such voltage-tunable resonators is the first step toward realizing wafer-scale continuous voltage control in superconducting circuits for qubit-qubit coupling, quantum-limited amplifiers, and quantum memory platforms.
@article{arxiv.2210.02491,
title = {Superconducting resonators with voltage-controlled frequency and nonlinearity},
author = {William M. Strickland and Bassel Heiba Elfeky and Joseph O'Connell Yuan and William F. Schiela and Peng Yu and Dylan Langone and Maxim G. Vavilov and Vladimir E. Manucharyan and Javad Shabani},
journal= {arXiv preprint arXiv:2210.02491},
year = {2023}
}