SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 58: Poster: Superconductivity II

TT 58.17: Poster

Donnerstag, 30. März 2023, 15:00–18:00, P2/OG3

Towards millimeter-wave superconducting qubits — •Philipp Lenhard, Jürgen Lisenfeld, and Alexey V. Ustinov — Physikalisches Institut, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

Superconducting circuits are a promising platform to realize a solid-state quantum computer. However, scaling up to larger multi-qubit circuits is severely hindered by decoherence of various origins. While contemporary qubits are typically operated between 3 and 6 GHz resonance frequencies, here we investigate qubit designs for millimeter-wave operation frequencies between 80 and 110 GHz. We present first spectroscopic measurements of resonant energy level transitions in a current-biased Josephson junction in the millimeter-wave regime. In addition, we show simulations of designs for integrating qubits and readout resonators in 3D-waveguides.