Our research on microwave dynamics of gated Al/InAs superconducting nanowires is now published in Applied Physics Letters!

Link to Paper

Congratulations to our colleague Vittorio Buccheri, co-author of a study now published in Applied Physics Letters. The paper, Microwave dynamics of gated Al/InAs superconducting nanowires, investigates how superconducting nanowires respond to gate voltage control in the microwave regime.

The team studied a hybrid nanowire with an InAs core and an epitaxial Al shell, embedded in a coplanar waveguide resonator and controlled by a gate line. Their main results are:

  • Gate tuning of the resonator fr exceeding 90 MHz at the cost of ~85% decrease in Qi.
  • An effective temperature model relates resonator’s δ fr and δ Qi within the Mattis–Bardeen framework.
  • Gate response on tens-of-nanoseconds timescales.
  • Sidebands spectroscopy validation.

Implications for Quantum Technologies

Gate-tunable superconducting devices with fast response times (30–50 ns) could support:

  • Tunable resonator or qubit coupling
  • Superconducting switches
  • Cryogenic control circuitry without magnetic interference

As part of the 202Q-lab team, we are especially excited to see our colleague Vittorio’s contribution to this work, and we celebrate the role this paper plays in advancing the quantum technology landscape.