Rapid single-shot parity spin readout in a silicon double quantum dot with fidelity exceeding 99 %
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866914678278455296 |
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| author | Takeda, Kenta Noiri, Akito Nakajima, Takashi Camenzind, Leon C. Kobayashi, Takashi Sammak, Amir Scappucci, Giordano Tarucha, Seigo |
| author_facet | Takeda, Kenta Noiri, Akito Nakajima, Takashi Camenzind, Leon C. Kobayashi, Takashi Sammak, Amir Scappucci, Giordano Tarucha, Seigo |
| contents | Silicon-based spin qubits offer a potential pathway toward realizing a scalable quantum computer owing to their compatibility with semiconductor manufacturing technologies. Recent experiments in this system have demonstrated crucial technologies, including high-fidelity quantum gates and multiqubit operation. However, the realization of a fault-tolerant quantum computer requires a high-fidelity spin measurement faster than decoherence. To address this challenge, we characterize and optimize the initialization and measurement procedures using the parity-mode Pauli spin blockade technique. Here, we demonstrate a rapid (with a duration of a few us) and accurate (with >99% fidelity) parity spin measurement in a silicon double quantum dot. These results represent a significant step forward toward implementing measurement-based quantum error correction in silicon. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_00225 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Rapid single-shot parity spin readout in a silicon double quantum dot with fidelity exceeding 99 % Takeda, Kenta Noiri, Akito Nakajima, Takashi Camenzind, Leon C. Kobayashi, Takashi Sammak, Amir Scappucci, Giordano Tarucha, Seigo Mesoscale and Nanoscale Physics Quantum Physics Silicon-based spin qubits offer a potential pathway toward realizing a scalable quantum computer owing to their compatibility with semiconductor manufacturing technologies. Recent experiments in this system have demonstrated crucial technologies, including high-fidelity quantum gates and multiqubit operation. However, the realization of a fault-tolerant quantum computer requires a high-fidelity spin measurement faster than decoherence. To address this challenge, we characterize and optimize the initialization and measurement procedures using the parity-mode Pauli spin blockade technique. Here, we demonstrate a rapid (with a duration of a few us) and accurate (with >99% fidelity) parity spin measurement in a silicon double quantum dot. These results represent a significant step forward toward implementing measurement-based quantum error correction in silicon. |
| title | Rapid single-shot parity spin readout in a silicon double quantum dot with fidelity exceeding 99 % |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2309.00225 |