Frequency-tunable transmon in a three-dimensional copper cavity

doi:10.1088/1674-1056/24/11/110301

Abstract 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.

Keywords: superconducting qubit three-dimensional transmon tunable transmon dc-superconducting quantum interference device

Received: 01 May 2015
Revised: 15 July 2015
Accepted manuscript online:

PACS:	03.67.Lx	(Quantum computation architectures and implementations)
	42.50.Pq	(Cavity quantum electrodynamics; micromasers)
	85.25.Dq	(Superconducting quantum interference devices (SQUIDs))

Fund: Project supported by the National Basic Research Program of China (Grant Nos. 2011CB922104 and 2011CBA00200), the National Natural Science Foundation of China (Grant No. 11474154), the Natural Science Foundation of Jiangsu Province, China (Grant No. BK2012013), the Priority Academic Program Development of Jiangsu Higher Education Institutions, China, the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120091110030), and the Dengfeng Project B of Nanjing University, China.

Corresponding Authors: Sun Guo-Zhu
E-mail: gzsun@nju.edu.cn

Cite this article:

Pan Jia-Zheng (潘佳政), Cao Zhi-Min (曹志敏), Fan Yun-Yi (范云益), Zhou Yu (周渝), Lan Dong (兰栋), Liu Yu-Hao (刘宇浩), Chen Zhi-Ping (陈志平), Li Yong-Chao (李永超), Cao Chun-Hai (曹春海), Xu Wei-Wei (许伟伟), Kang Lin (康琳), Chen Jian (陈健), Yu Hai-Feng (于海峰), Yu Yang (于扬), Sun Guo-Zhu (孙国柱), Wu Pei-Heng (吴培亨) Frequency-tunable transmon in a three-dimensional copper cavity 2015 Chin. Phys. B 24 110301

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Frequency-tunable transmon in a three-dimensional copper cavity

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