Thermal circuit model for silicon quantum-dot array structures
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arXiv
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| Hauptverfasser: | , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912555771887616 |
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| author | Utsugi, Takeru Kusuno, Nobuhiro Kuno, Takuma Lee, Noriyuki Yanagi, Itaru Mine, Toshiyuki Saito, Shinichi Hisamoto, Digh Tsuchiya, Ryuta Mizuno, Hiroyuki |
| author_facet | Utsugi, Takeru Kusuno, Nobuhiro Kuno, Takuma Lee, Noriyuki Yanagi, Itaru Mine, Toshiyuki Saito, Shinichi Hisamoto, Digh Tsuchiya, Ryuta Mizuno, Hiroyuki |
| contents | Temperature rise of qubits due to heating is a critical issue in large-scale quantum computers based on quantum-dot (QD) arrays. This leads to shorter coherence times, induced readout errors, and increased charge noise. Here, we propose a simple thermal circuit model to describe the heating effect on silicon QD array structures. Noting that the QD array is a periodic structure, we represent it as a thermal distributed-element circuit, forming a thermal transmission line. We validate this model by measuring the electron temperature in a QD array device using Coulomb blockade thermometry, finding that the model effectively reproduces experimental results. This simple and scalable model can be used to develop the thermal design of large-scale silicon-based quantum computers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_14565 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Thermal circuit model for silicon quantum-dot array structures Utsugi, Takeru Kusuno, Nobuhiro Kuno, Takuma Lee, Noriyuki Yanagi, Itaru Mine, Toshiyuki Saito, Shinichi Hisamoto, Digh Tsuchiya, Ryuta Mizuno, Hiroyuki Mesoscale and Nanoscale Physics Applied Physics Temperature rise of qubits due to heating is a critical issue in large-scale quantum computers based on quantum-dot (QD) arrays. This leads to shorter coherence times, induced readout errors, and increased charge noise. Here, we propose a simple thermal circuit model to describe the heating effect on silicon QD array structures. Noting that the QD array is a periodic structure, we represent it as a thermal distributed-element circuit, forming a thermal transmission line. We validate this model by measuring the electron temperature in a QD array device using Coulomb blockade thermometry, finding that the model effectively reproduces experimental results. This simple and scalable model can be used to develop the thermal design of large-scale silicon-based quantum computers. |
| title | Thermal circuit model for silicon quantum-dot array structures |
| topic | Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2412.14565 |