Single-electron pump in a quantum dot array for silicon quantum computers
| Autor: | Takeru Utsugi, Noriyuki Lee, Ryuta Tsuchiya, Toshiyuki Mine, Raisei Mizokuchi, Jun Yoneda, Tetsuo Kodera, Shinichi Saito, Digh Hisamoto, Hiroyuki Mizuno |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Japanese Journal of Applied Physics. 62:SC1020 |
| ISSN: | 1347-4065 0021-4922 |
| Popis: | It is necessary to load single electrons into individual quantum dots (QDs) in an array for implementing fully scalable silicon-based quantum computers. However, this single-electron loading would be impacted by the variability of the QD characteristics, and suppressing this variability is highly challenging even in the state-of-the-art silicon front-end process. Here, we used a single-electron pump (SEP) for loading single electrons into a QD array as a preparatory step to use electrons as spin qubits. We used parallel gates in the QD array as a SEP and demonstrated 100 MHz operation with an accuracy of 99% at 4 K. By controlling the timing of a subsequent gate synchronously as a shutter, we found that the jitter representing electron transfer was less than 10 ns, which would be acceptable for a typical operating speed of around 1 MHz for silicon qubits. |
| Databáze: | OpenAIRE |
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