Superconducting gatemon qubit based on Cd₃As₂ Dirac semimetal nanowires

We demonstrate gate-tunable superconducting qubits based on Cd₃As₂ Dirac semimetal nanowires (NWs). The Cd₃As₂ NWs, contacted with Ti/Al superconducting electrodes to form Josephson junctions, are integrated with NbTi-based superconducting resonator circuits, while the Josephson junction properties are controlled electrostatically via side gate voltage. The qubit frequencies are adjustable from 1.5 to 4.3 GHz, attributed to gate-voltage-dependent modulation of the Josephson energy. Time-domain measurements demonstrated coherent Rabi oscillations with a decay time of approximately 8.8 ns, with the Rabi frequency scaling linearly with drive amplitude. These results represent the first demonstration of gate-tunable topological Dirac material-based gatemons, advancing the development of topological quantum computing architectures.