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Landau-Zener-Stückelberg-Majorana interference in a 3D transmon driven by a chirped microwave
Gong, Ming Zhou, Yu Lan, Dong Fan, Yunyi Pan, Jiazheng Yu, Haifeng Chen, Jian Sun, Guozhu Yu, Yang Han, Siyuan
Gong, Ming
Zhou, Yu
Lan, Dong
Fan, Yunyi
Pan, Jiazheng
Yu, Haifeng
Chen, Jian
Sun, Guozhu
Yu, Yang
Han, Siyuan
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Abstract
By driving a 3D transmon with microwave fields, we generate an effective avoided energy-level crossing. Then we chirp microwave frequency, which is equivalent to driving the system through the avoided energy-level crossing by sweeping the avoided crossing. A double-passage chirp produces Landau-Zener-Stückelberg-Majorana (LZSM) interference that agree well with the numerical results, especially with the initial state being an eigen-energy state in the center of an avoided level crossing. A time-resolved state tomography measurement is performed in the evolution of LZSM interference, showing an experimental evidence for the dynamical evolution of quantum state. Our method is fully applicable to other quantum systems that contain no intrinsic avoided level crossing, providing an alternative approach for quantum control and quantum simulation.
Description
This work was partially supported by the SKPBR of China (2011CB922104), NSFC (11474154, 93121310, 11274156, 61521001, BK2012013, 11474152), PAPD, a doctoral program (20120091110030), and Dengfeng Project B of Nanjing University. S.H. was supported in part by NSF (PHY-1314861).
Date
2016-03
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AIP Publishing
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Keywords
Quibits, Chirping, Microwaves, Tomography, Superconductivity
Citation
Gong, M., Zhou, Y., Lan, D., Fan, Y., Pan, J., Yu, H., . . . Wu, P. (2016). Landau-Zener-Stückelberg-Majorana interference in a 3D transmon driven by a chirped microwave. Applied Physics Letters, 108(11), 112602. doi:10.1063/1.4944327