Single electron routing in a silicon quantum-dot array
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866912192730759168 |
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| author | Utsugi, Takeru Kuno, Takuma Lee, Noriyuki Tsuchiya, Ryuta Mine, Toshiyuki Hisamoto, Digh Saito, Shinichi Mizuno, Hiroyuki |
| author_facet | Utsugi, Takeru Kuno, Takuma Lee, Noriyuki Tsuchiya, Ryuta Mine, Toshiyuki Hisamoto, Digh Saito, Shinichi Mizuno, Hiroyuki |
| contents | The ability to transport single electrons on a quantum dot array dramatically increases the freedom in designing quantum computation schemes that can be implemented on solid-state devices. So far, however, routing schemes to precisely control the transport paths of single electrons have yet to be established. Here, we propose a silicon single-electron router that transports pumped electrons along the desired route on the branches of a T-shaped quantum dot array by inputting a synchronous phase-controlled signal to multiple gates. Notably, we show that it is possible to achieve a routing accuracy above 99\% by boosting the accuracy of the electron-transport timing with an assist gate in front of the branching paths. We also evaluated the minimum error rate of routing by the model of electron transport based on the Wigner representation in an energy-time space. The results suggest new possibilities for fast and accurate transport of single electrons on the two-dimensional quantum dot arrays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_05271 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Single electron routing in a silicon quantum-dot array Utsugi, Takeru Kuno, Takuma Lee, Noriyuki Tsuchiya, Ryuta Mine, Toshiyuki Hisamoto, Digh Saito, Shinichi Mizuno, Hiroyuki Mesoscale and Nanoscale Physics The ability to transport single electrons on a quantum dot array dramatically increases the freedom in designing quantum computation schemes that can be implemented on solid-state devices. So far, however, routing schemes to precisely control the transport paths of single electrons have yet to be established. Here, we propose a silicon single-electron router that transports pumped electrons along the desired route on the branches of a T-shaped quantum dot array by inputting a synchronous phase-controlled signal to multiple gates. Notably, we show that it is possible to achieve a routing accuracy above 99\% by boosting the accuracy of the electron-transport timing with an assist gate in front of the branching paths. We also evaluated the minimum error rate of routing by the model of electron transport based on the Wigner representation in an energy-time space. The results suggest new possibilities for fast and accurate transport of single electrons on the two-dimensional quantum dot arrays. |
| title | Single electron routing in a silicon quantum-dot array |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2308.05271 |