Macroscopic resonant tunneling in an rf-SQUID flux qubit under a single-cycle sinusoidal driving

doi:10.1088/1674-1056/26/4/047402

中国物理B ›› 2017, Vol. 26 ›› Issue (4): 47402-047402.doi: 10.1088/1674-1056/26/4/047402

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Macroscopic resonant tunneling in an rf-SQUID flux qubit under a single-cycle sinusoidal driving

Jianxin Shi(史建新), Weiwei Xu(许伟伟), Guozhu Sun(孙国柱), Jian Chen(陈健), Lin Kang(康琳), Peiheng Wu(吴培亨)

1 Research Institute of Superconductor Electronics(RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;
2 Department of Electrical Engineering and Optoelectronic Technology, Nanjing University of Science and Technology Zijin College, Nanjing 210046, China

收稿日期:2016-10-31 修回日期:2017-01-18 出版日期:2017-04-05 发布日期:2017-04-05
通讯作者: Weiwei Xu, Guozhu Sun E-mail:wwxu@nju.edu.cn;gzsun@nju.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11474154, 61371036, 61571219, 11227904, and 61501222) and the Natural Science Fund for Distinguished Young Scholars of Jiangsu Province, China (Grant No. BK2012013) and PAPD.

Macroscopic resonant tunneling in an rf-SQUID flux qubit under a single-cycle sinusoidal driving

Jianxin Shi(史建新)^1,2, Weiwei Xu(许伟伟)¹, Guozhu Sun(孙国柱)¹, Jian Chen(陈健)¹, Lin Kang(康琳)¹, Peiheng Wu(吴培亨)¹

1 Research Institute of Superconductor Electronics(RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;
2 Department of Electrical Engineering and Optoelectronic Technology, Nanjing University of Science and Technology Zijin College, Nanjing 210046, China

Received:2016-10-31 Revised:2017-01-18 Online:2017-04-05 Published:2017-04-05
Contact: Weiwei Xu, Guozhu Sun E-mail:wwxu@nju.edu.cn;gzsun@nju.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11474154, 61371036, 61571219, 11227904, and 61501222) and the Natural Science Fund for Distinguished Young Scholars of Jiangsu Province, China (Grant No. BK2012013) and PAPD.

摘要/Abstract

摘要：

We experimentally demonstrate the observation of macroscopic resonant tunneling (MRT) phenomenon of the macroscopic distinct flux states in a radio frequency superconducting quantum interference device (rf-SQUID) under a single-cycle sinusoidal driving. The population of the qubit exhibits interference patterns corresponding to resonant tunneling peaks between states in the adjacent potential wells. The dynamics of the qubit depends significantly on the amplitude, frequency, and initial phase of the driving signal. We do the numerical simulations considering the intra-well and inter-well relaxation mechanism, which agree well with the experimental results. This approach provides an effective way to manipulate the qubit population by adjusting the parameters of the external driving field.

关键词: superconducting quantum interference device (SQUID), macroscopic resonant tunneling (MRT), Landau-Zener transition

Abstract:

Key words: superconducting quantum interference device (SQUID), macroscopic resonant tunneling (MRT), Landau-Zener transition

中图分类号: (Quantum critical phenomena)

74.40.Kb

74.50.+r (Tunneling phenomena; Josephson effects)

史建新, 许伟伟, 孙国柱, 陈健, 康琳, 吴培亨. Macroscopic resonant tunneling in an rf-SQUID flux qubit under a single-cycle sinusoidal driving[J]. 中国物理B, 2017, 26(4): 47402-047402.

Jianxin Shi(史建新), Weiwei Xu(许伟伟), Guozhu Sun(孙国柱), Jian Chen(陈健), Lin Kang(康琳), Peiheng Wu(吴培亨). Macroscopic resonant tunneling in an rf-SQUID flux qubit under a single-cycle sinusoidal driving[J]. Chin. Phys. B, 2017, 26(4): 47402-047402.

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Macroscopic resonant tunneling in an rf-SQUID flux qubit under a single-cycle sinusoidal driving

Macroscopic resonant tunneling in an rf-SQUID flux qubit under a single-cycle sinusoidal driving

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