Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds
Abstract Here we report a breakthrough in the fabrication of a long lifetime transmon qubit. We use tantalum films as the base superconductor. By using a dry etching process, we obtained transmon qubits with a best T 1 lifetime of 503 μs. As a comparison, we also fabricated transmon qubits with othe...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-01-01
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| Series: | npj Quantum Information |
| Online Access: | https://doi.org/10.1038/s41534-021-00510-2 |
| _version_ | 1818753790883397632 |
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| author | Chenlu Wang Xuegang Li Huikai Xu Zhiyuan Li Junhua Wang Zhen Yang Zhenyu Mi Xuehui Liang Tang Su Chuhong Yang Guangyue Wang Wenyan Wang Yongchao Li Mo Chen Chengyao Li Kehuan Linghu Jiaxiu Han Yingshan Zhang Yulong Feng Yu Song Teng Ma Jingning Zhang Ruixia Wang Peng Zhao Weiyang Liu Guangming Xue Yirong Jin Haifeng Yu |
| author_facet | Chenlu Wang Xuegang Li Huikai Xu Zhiyuan Li Junhua Wang Zhen Yang Zhenyu Mi Xuehui Liang Tang Su Chuhong Yang Guangyue Wang Wenyan Wang Yongchao Li Mo Chen Chengyao Li Kehuan Linghu Jiaxiu Han Yingshan Zhang Yulong Feng Yu Song Teng Ma Jingning Zhang Ruixia Wang Peng Zhao Weiyang Liu Guangming Xue Yirong Jin Haifeng Yu |
| author_sort | Chenlu Wang |
| collection | DOAJ |
| description | Abstract Here we report a breakthrough in the fabrication of a long lifetime transmon qubit. We use tantalum films as the base superconductor. By using a dry etching process, we obtained transmon qubits with a best T 1 lifetime of 503 μs. As a comparison, we also fabricated transmon qubits with other popular materials, including niobium and aluminum, under the same design and fabrication processes. After characterizing their coherence properties, we found that qubits prepared with tantalum films have the best performance. Since the dry etching process is stable and highly anisotropic, it is much more suitable for fabricating complex scalable quantum circuits, when compared to wet etching. As a result, the current breakthrough indicates that the dry etching process of tantalum film is a promising approach to fabricate medium- or large-scale superconducting quantum circuits with a much longer lifetime, meeting the requirements for building practical quantum computers. |
| first_indexed | 2024-12-18T05:12:58Z |
| format | Article |
| id | doaj.art-89481ca49254402ca66add6748aff06d |
| institution | Directory Open Access Journal |
| issn | 2056-6387 |
| language | English |
| last_indexed | 2024-12-18T05:12:58Z |
| publishDate | 2022-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Information |
| spelling | doaj.art-89481ca49254402ca66add6748aff06d2022-12-21T21:19:50ZengNature Portfolionpj Quantum Information2056-63872022-01-01811610.1038/s41534-021-00510-2Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 millisecondsChenlu Wang0Xuegang Li1Huikai Xu2Zhiyuan Li3Junhua Wang4Zhen Yang5Zhenyu Mi6Xuehui Liang7Tang Su8Chuhong Yang9Guangyue Wang10Wenyan Wang11Yongchao Li12Mo Chen13Chengyao Li14Kehuan Linghu15Jiaxiu Han16Yingshan Zhang17Yulong Feng18Yu Song19Teng Ma20Jingning Zhang21Ruixia Wang22Peng Zhao23Weiyang Liu24Guangming Xue25Yirong Jin26Haifeng Yu27Beijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesBeijing Academy of Quantum Information SciencesAbstract Here we report a breakthrough in the fabrication of a long lifetime transmon qubit. We use tantalum films as the base superconductor. By using a dry etching process, we obtained transmon qubits with a best T 1 lifetime of 503 μs. As a comparison, we also fabricated transmon qubits with other popular materials, including niobium and aluminum, under the same design and fabrication processes. After characterizing their coherence properties, we found that qubits prepared with tantalum films have the best performance. Since the dry etching process is stable and highly anisotropic, it is much more suitable for fabricating complex scalable quantum circuits, when compared to wet etching. As a result, the current breakthrough indicates that the dry etching process of tantalum film is a promising approach to fabricate medium- or large-scale superconducting quantum circuits with a much longer lifetime, meeting the requirements for building practical quantum computers.https://doi.org/10.1038/s41534-021-00510-2 |
| spellingShingle | Chenlu Wang Xuegang Li Huikai Xu Zhiyuan Li Junhua Wang Zhen Yang Zhenyu Mi Xuehui Liang Tang Su Chuhong Yang Guangyue Wang Wenyan Wang Yongchao Li Mo Chen Chengyao Li Kehuan Linghu Jiaxiu Han Yingshan Zhang Yulong Feng Yu Song Teng Ma Jingning Zhang Ruixia Wang Peng Zhao Weiyang Liu Guangming Xue Yirong Jin Haifeng Yu Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds npj Quantum Information |
| title | Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds |
| title_full | Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds |
| title_fullStr | Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds |
| title_full_unstemmed | Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds |
| title_short | Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds |
| title_sort | towards practical quantum computers transmon qubit with a lifetime approaching 0 5 milliseconds |
| url | https://doi.org/10.1038/s41534-021-00510-2 |
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