Experimental verification of superconducting metamaterial quarter-wavelength transmission line resonators with non-uniform mode spacing.

Qing Tang, Jia Xing He, Ya Qiang Chai, Peng Hui Ouyang, Lian Fu Wei

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Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

Qing TangInformation Quantum Technology Laboratory, School of Information Science and Technology, International Cooperation Research Center of China Communication and Sensor Networks for Modern Transportation, Southwest Jiaotong University, Chengdu, 610031, China.

Jia Xing HeInformation Quantum Technology Laboratory, School of Information Science and Technology, International Cooperation Research Center of China Communication and Sensor Networks for Modern Transportation, Southwest Jiaotong University, Chengdu, 610031, China.

Ya Qiang ChaiInformation Quantum Technology Laboratory, School of Information Science and Technology, International Cooperation Research Center of China Communication and Sensor Networks for Modern Transportation, Southwest Jiaotong University, Chengdu, 610031, China.

Peng Hui OuyangInformation Quantum Technology Laboratory, School of Information Science and Technology, International Cooperation Research Center of China Communication and Sensor Networks for Modern Transportation, Southwest Jiaotong University, Chengdu, 610031, China.

Lian Fu WeiInformation Quantum Technology Laboratory, School of Information Science and Technology, International Cooperation Research Center of China Communication and Sensor Networks for Modern Transportation, Southwest Jiaotong University, Chengdu, 610031, China. lfwei@swjtu.edu.cn.

Funding

National Key Research and Development Program of China No. 2021YFA0718803National Natural Science Foundation of China No. 11974290

6 · The paper itself

Abstract

Superconducting transmission line resonators (TLRs) have been widely applied to circuit quantum electrodynamical systems for superconducting quantum computation and single-photon detections. Recently, such a right-handed TLR has been generalized to electromagnetic metamaterials (MTMs), and its unconventional mode structure has been experimentally characterized (Wang et al. in Phys Rev Appl 11:054062, 2019). Here, we demonstrate another kind of MTM TLR, i.e., the superconducting quarter-wavelength composite right/left-handed (CRLH) TLRs composed of lumped elements. We design the devices and analyze their transport properties by developing a real-space approach, wherein the physical parameters at the device boundaries are utilized conveniently. Superconducting MTM TLRs with typical three unit cells were experimentally prepared by etching a superconducting aluminum film on a SiO[Formula: see text] substrate, and their microwave transport properties were measured at low temperatures of 50 mK. The results show that the modes spacing in such a quarter-wavelength CRLH-TLR is non-uniform, due to the nonlinear dispersion relation. This implies that it could be utilized to encode the superconducting qubits, analogously to the usual ones encoded by using the Josephson devices.

Identifiers

PMID40097404

DOI10.1038/s41598-025-89931-z

PMCPMC11914599

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