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卢盛,潘佳政,李子硕,卢亚鹏,江俊良,魏兴雨,涂学凑,曹春海,孙国柱,吴培亨.3D-Transmon 与压电振子的量子耦合系统[J].低温物理学报,2019,(5):349-354. [点击复制]
- LU Sheng,PAN Jiazheng,LI Zishuo,LU Yapeng,JIANG Junliang,WEI Xingyu,XU Xuecou,CAO Chunhai,SUN Guozhu,WU Peiheng.Quantum CoupledSystem Based on 3D-Transmon and Piezoelectric Oscillator[J].LOW TEMPERATURE PHYSICAL LETTERS,2019,(5):349-354. [点击复制]
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| 3D-Transmon 与压电振子的量子耦合系统 |
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卢盛, 潘佳政, 李子硕, 卢亚鹏, 江俊良, 魏兴雨, 涂学凑, 曹春海, 孙国柱, 吴培亨
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| (南京大学电子科学与工程学院超导电子学研究所, 南京 210023) |
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| 摘要: |
| 微机械振子在量子信息领域有着重要的应用, 可用作量子存储器、量子换能器等. 鉴于三维传输子量子比特(3D-Transmon)优良的退相干特性以及AlN 压电振子较高的谐振频率, 我们利用微纳加工技术, 在蓝宝石基片上成功制备了3D-Transmon 与AlN 压电振子的量子耦合系统. 实际测量结果显示, 在外加磁场偏置下, 量子比特的跃迁频率可调范围为4.1~9.8 GHz, 能量弛豫时间 T1 约为4.7 μs, 并且测量到了能级免交叉现象. 这些结果为今后超导量子比特与微机械振子耦合系统的深入研究提供了重要参考 |
| 关键词: 超导量子比特, 压电振子, 量子耦合系统, 微纳加工 |
| DOI： |
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| 基金项目: |
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| Quantum CoupledSystem Based on 3D-Transmon and Piezoelectric Oscillator |
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LU Sheng, PAN Jiazheng, LI Zishuo, LU Yapeng, JIANG Junliang, WEI Xingyu, XU Xuecou, CAO Chunhai, SUN Guozhu, WU Peiheng
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| (Research Institute of Superconducting Electronics , School of Electronic Scienceand Engineering , Nanjing University , Nanjing 210023) |
| Abstract: |
| Micromechanical oscillators have important applications in the field of quantum information, such as being quantum memory, quantum transducer and so on. Considering the excellent coherence of 3D-Transmon and the high resonant frequency of AlN piezoelectric oscillator, we fabricated a quantum coupled system of 3D Transmon and piezoelectric oscillator on sapphire substrate using micro-nanofabrication technology. The experiment results show that the transition frequency of 3D-Transmon can be adjusted from 4.1 GHz to 9.8 GHz with a tunable external magneticfield, and the energy relaxation time T1 is about 4.7 μs. An avoidcrossing in the spectrum is also measured. These results may help a lot in the further study of the superconducting qubit and micromechanical oscillator coupled systems. |
| Key words: Superconducting Quantum Bits, Piezoelectric Oscillators, Quantum CoupledSystems, Micro-nanofabrication |
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