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Chin. Phys. B, 2021, Vol. 30(4): 048501    DOI: 10.1088/1674-1056/abc2bb

Controllable microwave frequency comb generation in a tunable superconducting coplanar-waveguide resonator

Shuai-Peng Wang(王帅鹏)1, Zhen Chen(陈臻)1,3, and Tiefu Li(李铁夫)2,1,3,4,†
1 Quantum Physics and Quantum Information Division, Beijing Computational Science Research Center, Beijing 100193, China; 2 Institute of Microelectronics, Tsinghua University, Beijing 100084, China; 3 Beijing Academy of Quantum Information Sciences, Beijing 100193, China; 4 Frontier Science Center for Quantum Information, Beijing 100084, China
Abstract  Frequency combs are useful in a wide range of applications, such as optical metrology and high-precision spectroscopy. We experimentally study a controllable frequency comb generated in a tunable superconducting coplanar-waveguide resonator in the microwave regime. A two-tone drive is applied on one of the resonance modes of the resonator and comb generation is observed around the resonance frequency of the resonator. Both central frequency and teeth density of the comb are precisely controllable, and the teeth spacing can be adjusted from Hz to MHz. Moreover, we show that a few hundreds of sidebands can be generated using a sufficiently strong drive power and the weakest drive power needed to generate the comb can be reduced to approach the quantum limit. These experimental results can be qualitatively explained via theoretical analysis.
Keywords:  superconducting circuit      SQUID      microwave frequency comb  
Received:  19 August 2020      Revised:  18 September 2020      Accepted manuscript online:  20 October 2020
PACS:  85.25.Am (Superconducting device characterization, design, and modeling)  
  85.25.Cp (Josephson devices)  
  85.25.Dq (Superconducting quantum interference devices (SQUIDs))  
Fund: Project supported by the Science Challenge Project (Grant No. TZ2018003), the National Key Research and Development Program of China (Grant No. 2016YFA0301200), the National Natural Science Foundation of China (Grant Nos. 62074091, 11934010, U1801661, and U1930402), and the BAQIS Research Program (Grant No. Y18G27).
Corresponding Authors:  Corresponding author. E-mail:   

Cite this article: 

Shuai-Peng Wang(王帅鹏), Zhen Chen(陈臻), and Tiefu Li(李铁夫) Controllable microwave frequency comb generation in a tunable superconducting coplanar-waveguide resonator 2021 Chin. Phys. B 30 048501

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