,Frequency-tunable transmon in a three-dimensional copper cavity

• 作 者: 潘佳政 曹志敏 范云益 周渝 兰栋 刘宇浩 陈志平 李永超 曹春海 许伟伟 康琳 陈健 于海峰 于扬 孙国柱 吴培亨
• 机 构: National Laboratory of Solid State Microstructures and Research Institute of Superconductor Electron
• 出 处: Chinese Physics B
• 发表日期: 2015年11期
• 关键词: superconducting qubit three-dimensional transmon tunable transmon dc-superconduc

We have realized a frequency-tunable transmon in a three-dimensional cooper cavity using a direct current superconducting quantum interference device. Both the transition frequency of the transmon and the frequency of the dressed cavity can be varied with the applied external flux bias, which are well consistent with the theoretical model. The range of the variable transition frequency is from 5.188 GHz to 7.756 GHz. The energy relaxation time of the transmon is hundreds of nanoseconds.

We have realized a frequency-tunable transmon in a three-dimensional cooper cavity using a direct current superconducting quantum interference device. Both the transition frequency of the transmon and the frequency of the dressed cavity can be varied with the applied external flux bias, which are well consistent with the theoretical model. The range of the variable transition frequency is from 5.188 GHz to 7.756 GHz. The energy relaxation time of the transmon is hundreds of nanoseconds.