Voltage tunable superconducting qubit based on Sn-InAs nanowire Josephson junction

Hybrid superconductor-semiconductor Josephson junctions offer an attractive alternative to conventional oxide-based superconducting tunnel junctions for use in superconducting qubits, as they provide electrostatic gate control over both the operating frequency and anharmonicity. Recently, Sn-based hybrid Josephson junctions have demonstrated a larger induced superconducting gap and better magnetic field resilience compared to Aluminum-based hybrid unctions. In this work, we utilize Sn-InAs nanowire Josephson junctions to create gate-tunable transmon qubit. We show qubit frequency tunability over a frequency range of more than 4 GHz and strong coupling of the qubit and cavity. With time domain measurements we demonstrate Rabi oscillations and report qubit relaxation times upto T1 ~26 μs and dephasing time upto T2*~1.3 μs.