Simplified Josephson-junction fabrication process for reproducibly high-performance superconducting qubits
Simplified Josephson-junction fabrication process for reproducibly high-performance superconducting qubits
We introduce a simplified fabrication technique for Josephson junctions and demonstrate superconducting Xmon qubits with T1 relaxation times averaging above 50 μs (Q>1.5×106). Current shadow-evaporation techniques for aluminum-based Josephson junctions require a separate lithography step to deposit a patch that makes a galvanic, superconducting connection between the junction electrodes and …