[8p-Z27-1~17] 11.5 Junction and circuit fabrication process, digital applications

[8p-Z27-1] Development of NbN-based superconducting qubit with π-phase shifter

〇Sunmi Kim¹, Taro Yamashita², Hirotaka Terai¹, Wei Qiu¹, Tomoko Fuse¹, Fumiki Yoshihara¹, Kouichi Semba¹ (1.NICT, 2.Nagoya Univ.)

Keywords:Superconducting quibit, Nitride superconductor, \pi phase shifter

We have been investigating superconducting qubits based on fully epitaxial NbN/AlN/NbN Josephson Junctions which have attractive properties for qubit applications such as the high crystal quality, its chemical stability against oxidization, and relatively high transition temperature (~ 16 K) of NbN. In this presentation, we will report the experimental results for the NbN-based superconducting qubits with a π-phase shifter which have been studied for high coherence.