Electron-beam annealing of Josephson junctions for frequency tuning of quantum processors
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866912148675887104 |
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| author | Balaji, Yashwanth Acharya, Narendra Armstrong, Robert Crawford, Kevin G. Danilin, Sergey Dixon, Thomas Kennedy, Oscar W. Pothuraju, Renuka Devi Shahbazi, Kowsar Shelly, Connor D. |
| author_facet | Balaji, Yashwanth Acharya, Narendra Armstrong, Robert Crawford, Kevin G. Danilin, Sergey Dixon, Thomas Kennedy, Oscar W. Pothuraju, Renuka Devi Shahbazi, Kowsar Shelly, Connor D. |
| contents | Superconducting qubits are a promising route to achieving large-scale quantum computers. A key challenge in realising large-scale superconducting quantum processors involves mitigating frequency collisions. In this paper, we present an approach to tuning fixed-frequency qubits with the use of an electron beam to locally anneal the Josephson junction. We demonstrate the ability to both increase and decrease the junction barrier resistance. The technique shows an improvement in wafer scale frequency targetting by assessing the frequency collisions in our qubit architecture. Coherence measurements are also done to evaluate the performance before and after tuning. The tuning process utilises a standard electron beam lithography system, ensuring reproducibility and implementation by any group capable of fabricating these Josephson junctions. This technique has the potential to significantly improve the performance of large-scale quantum computing systems, thereby paving the way for the future of quantum computing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_17395 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Electron-beam annealing of Josephson junctions for frequency tuning of quantum processors Balaji, Yashwanth Acharya, Narendra Armstrong, Robert Crawford, Kevin G. Danilin, Sergey Dixon, Thomas Kennedy, Oscar W. Pothuraju, Renuka Devi Shahbazi, Kowsar Shelly, Connor D. Quantum Physics Materials Science Superconductivity Superconducting qubits are a promising route to achieving large-scale quantum computers. A key challenge in realising large-scale superconducting quantum processors involves mitigating frequency collisions. In this paper, we present an approach to tuning fixed-frequency qubits with the use of an electron beam to locally anneal the Josephson junction. We demonstrate the ability to both increase and decrease the junction barrier resistance. The technique shows an improvement in wafer scale frequency targetting by assessing the frequency collisions in our qubit architecture. Coherence measurements are also done to evaluate the performance before and after tuning. The tuning process utilises a standard electron beam lithography system, ensuring reproducibility and implementation by any group capable of fabricating these Josephson junctions. This technique has the potential to significantly improve the performance of large-scale quantum computing systems, thereby paving the way for the future of quantum computing. |
| title | Electron-beam annealing of Josephson junctions for frequency tuning of quantum processors |
| topic | Quantum Physics Materials Science Superconductivity |
| url | https://arxiv.org/abs/2402.17395 |