Tunable coupling between Xmon qubit and coplanar waveguide resonatorProject supported by the National Key Research and Development Program of China (Grant Nos. 2017YFA0304300 and 2016YFA0300600), the National Natural Science Foundation of China (Grant Nos. 11725419 and 11434008), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB28000000)

Realization of a flexible and tunable coupling scheme among qubits is critical for scalable quantum information processing. Here, we design and characterize a tunable coupling element based on Josephson junction, which can be adapted to an all-to-all connected circuit architecture where multiple Xmo...

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Bibliographic Details
Published in:Chinese physics B 2019-08, Vol.28 (8)
Main Authors: Li, He-Kang, Li, Ke-Min, Dong, Hang, Guo, Qiu-Jiang, Liu, Wu-Xin, Wang, Zhan, Wang, Hao-Hua, Zheng, Dong-Ning
Format: Article
Language:English
Subjects:
qubit-resonator coupling
superconducting Xmon qubit
tunable coupling
Online Access:Get full text
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Summary:Realization of a flexible and tunable coupling scheme among qubits is critical for scalable quantum information processing. Here, we design and characterize a tunable coupling element based on Josephson junction, which can be adapted to an all-to-all connected circuit architecture where multiple Xmon qubits couple to a common coplanar waveguide resonator. The coupling strength is experimentally verified to be adjustable from 0 MHz to about 40 MHz, and the qubit lifetime can still be up to 12 μ s in the presence of the coupling element.
ISSN:1674-1056
DOI:10.1088/1674-1056/28/8/080305