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Special Issue:
SPECIAL TOPIC — Quantum computation and quantum simulation
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| SPECIAL TOPIC—Quantum computation and quantum simulation |
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Integrated superconducting circuit for qubit and resonator protection |
| Xiao-Pei Yang(杨晓沛), Zhi-Kun Han(韩志坤), Shu-Qing Song(宋树清), Wen Zheng(郑文), Dong Lan(兰栋), Xin-Sheng Tan(谭新生), and Yang Yu(于扬)† |
| National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China |
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Abstract A semi-infinite waveguide acts as a mirror and helps protect the qubit in front of it from decoherence. Here, we investigate the interference effect in an open waveguide consisting of resonators with different decay rates. We find that a lossy resonator works as a mirror and changes the effective decay rate of the other. The spontaneous radiation of qubit is related to its environment, and we can control it by arranging the lossy resonator's position or frequency. Our approach helps improving the qubit performance, as well as the quantum gate fidelities.
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Received: 08 April 2021
Revised: 10 May 2021
Accepted manuscript online: 12 May 2021
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PACS:
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84.40.Dc
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(Microwave circuits)
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12.20.-m
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(Quantum electrodynamics)
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31.30.J-
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(Relativistic and quantum electrodynamic (QED) effects in atoms, molecules, and ions)
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| Fund: Project supported by the National Key R&D Progarm of China (Grant No. 2016YFA0301802), the National Natural Science Foundation of China (Grant Nos. 61521001, 12074179, and 11890704), and the Key R&D Program of Guangdong Province, China (Grant No. 2018B030326001). |
Corresponding Authors:
Yang Yu
E-mail: yuyang@nju.edu.cn
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Cite this article:
Xiao-Pei Yang(杨晓沛), Zhi-Kun Han(韩志坤), Shu-Qing Song(宋树清), Wen Zheng(郑文), Dong Lan(兰栋), Xin-Sheng Tan(谭新生), and Yang Yu(于扬) Integrated superconducting circuit for qubit and resonator protection 2021 Chin. Phys. B 30 078403
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