Simultaneous High-Fidelity Single-Qubit Gates in a Spin Qubit Array
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866908451792224256 |
|---|---|
| author | Wu, Yi-Hsien Camenzind, Leon C. Bütler, Patrick Jin, Ik Kyeong Noiri, Akito Takeda, Kenta Nakajima, Takashi Kobayashi, Takashi Scappucci, Giordano Goan, Hsi-Sheng Tarucha, Seigo |
| author_facet | Wu, Yi-Hsien Camenzind, Leon C. Bütler, Patrick Jin, Ik Kyeong Noiri, Akito Takeda, Kenta Nakajima, Takashi Kobayashi, Takashi Scappucci, Giordano Goan, Hsi-Sheng Tarucha, Seigo |
| contents | Silicon spin qubits are a promising platform for scalable quantum computing due to their compatibility with industrial semiconductor fabrication and the recent scaling to multi-qubit devices. Control fidelities above the 99% fault-tolerant threshold are routinely achieved, but extending high-fidelity control to simultaneous multi-qubit operation remains a major challenge. We demonstrate high-fidelity, fully parallel control of five silicon spin qubits using a single shared microwave line. Using tailored control pulses, all qubits achieve primitive $π/2$ gate fidelities well above 99.99%, with some approaching 99.999%, exceeding previously reported fidelities in silicon spin qubits. These fidelities are mostly preserved during simultaneous operation of up to three qubits, and remain at the practical fault-tolerant threshold of 99.9% even during fully parallel five-qubit operation. This performance is enabled by a calibration scheme that compensates drive-induced phase shifts using only pairwise calibrations, scaling quadratically with qubit number and avoiding exponential overhead. By reducing the number of impedance-controlled microwave lines, our approach addresses a key architectural bottleneck and offers a scalable control strategy for high-fidelity operation in large spin qubit arrays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_11918 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Simultaneous High-Fidelity Single-Qubit Gates in a Spin Qubit Array Wu, Yi-Hsien Camenzind, Leon C. Bütler, Patrick Jin, Ik Kyeong Noiri, Akito Takeda, Kenta Nakajima, Takashi Kobayashi, Takashi Scappucci, Giordano Goan, Hsi-Sheng Tarucha, Seigo Quantum Physics Mesoscale and Nanoscale Physics Silicon spin qubits are a promising platform for scalable quantum computing due to their compatibility with industrial semiconductor fabrication and the recent scaling to multi-qubit devices. Control fidelities above the 99% fault-tolerant threshold are routinely achieved, but extending high-fidelity control to simultaneous multi-qubit operation remains a major challenge. We demonstrate high-fidelity, fully parallel control of five silicon spin qubits using a single shared microwave line. Using tailored control pulses, all qubits achieve primitive $π/2$ gate fidelities well above 99.99%, with some approaching 99.999%, exceeding previously reported fidelities in silicon spin qubits. These fidelities are mostly preserved during simultaneous operation of up to three qubits, and remain at the practical fault-tolerant threshold of 99.9% even during fully parallel five-qubit operation. This performance is enabled by a calibration scheme that compensates drive-induced phase shifts using only pairwise calibrations, scaling quadratically with qubit number and avoiding exponential overhead. By reducing the number of impedance-controlled microwave lines, our approach addresses a key architectural bottleneck and offers a scalable control strategy for high-fidelity operation in large spin qubit arrays. |
| title | Simultaneous High-Fidelity Single-Qubit Gates in a Spin Qubit Array |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2507.11918 |