Development of transmon qubit with Sn based hybrid superconductor-semiconductor nanowire josephson junction with electrostatic gate control

Qubits with hybrid superconducting-semiconducting nanowires have garnered considerable interest since their first demonstration with Aluminum (Al) based gatemons. Tin (Sn) based hybrid superconductor-semiconductor nanowire josephson junctions show promise in further developing this electrostatic gate tunable transmon qubit platform with its larger induced superconducting gap ^[1] and high magnetic field compatibility ^[1] compared to Al. In this work we present our experimental progress on developing electrostatic gate tunable transmon qubit with these Sn based hybrid nanowire Josephson Junctions. With spectroscopic and time domain measurements we report on their performance in terms of coherence and gate tunable anharmonicity.



^[1] M. Pendharkar., et al., Science 372, 508(2021)