Increasing energy relaxation time of superconducting qubits with nonmagnetic infrared filter and shield
Liu Yuhao1, Li Mengmeng1, Lan Dong1, Xue Guangming1, Tan Xinsheng1, †, , Yu Haifeng1, 2, ‡, , Yu Yang1, 2
The S parameters of the impedance matched filters measured at different temperatures. Panels (a) and (b) show the attenuation and return loss at room temperature and 77 K, respectively. (c) The impedance calculated from the return loss as a function of frequency.