Microwave Output Stabilization of a Qubit Controller via Device-Level Temperature Control
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_ | 1866912931190407168 |
|---|---|
| author | Kurimoto, Yoshinori Lee, Dongjun Ban, Koichiro Morisaka, Shinichi Sumida, Toshi Shiomi, Hidehisa Ito, Yosuke Sugita, Yuuya Negoro, Makoto Ohira, Ryutaro Miyoshi, Takefumi |
| author_facet | Kurimoto, Yoshinori Lee, Dongjun Ban, Koichiro Morisaka, Shinichi Sumida, Toshi Shiomi, Hidehisa Ito, Yosuke Sugita, Yuuya Negoro, Makoto Ohira, Ryutaro Miyoshi, Takefumi |
| contents | We present the design and performance of QuEL-1 SE, which is a multichannel qubit controller developed for superconducting qubits. The system incorporates the active thermal stabilization of critical analog integrated circuits, such as phase-locked loops, amplifiers, and mixers, to suppress the long-term amplitude and phase drift. To evaluate the amplitude and phase stability, we simultaneously monitor 15 microwave output channels over 24 h using a common analog-to-digital converter. Across the channels, the normalized amplitude exhibits standard deviations of 0.09\%--0.22\% (mean: 0.15\%), and the phase deviations are 0.35$^\circ$--0.44$^\circ$ (mean: 0.39$^\circ$). We further assess the impact of these deviations on quantum gate operations by estimating the average fidelity of an $X_{π/2}$ gate under the coherent errors corresponding to the deviations. The resulting gate infidelities are $2\times 10^{-6}$ for amplitude errors and $2\times 10^{-5}$ for phase errors, which are significantly lower than typical fault-tolerance thresholds such as those of the surface code. These results demonstrate that the amplitude and phase stability of QuEL-1 SE enables reliable long-duration quantum operations, thus highlighting its utility as a scalable control platform for superconducting and other qubit modalities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_04397 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Microwave Output Stabilization of a Qubit Controller via Device-Level Temperature Control Kurimoto, Yoshinori Lee, Dongjun Ban, Koichiro Morisaka, Shinichi Sumida, Toshi Shiomi, Hidehisa Ito, Yosuke Sugita, Yuuya Negoro, Makoto Ohira, Ryutaro Miyoshi, Takefumi Quantum Physics We present the design and performance of QuEL-1 SE, which is a multichannel qubit controller developed for superconducting qubits. The system incorporates the active thermal stabilization of critical analog integrated circuits, such as phase-locked loops, amplifiers, and mixers, to suppress the long-term amplitude and phase drift. To evaluate the amplitude and phase stability, we simultaneously monitor 15 microwave output channels over 24 h using a common analog-to-digital converter. Across the channels, the normalized amplitude exhibits standard deviations of 0.09\%--0.22\% (mean: 0.15\%), and the phase deviations are 0.35$^\circ$--0.44$^\circ$ (mean: 0.39$^\circ$). We further assess the impact of these deviations on quantum gate operations by estimating the average fidelity of an $X_{π/2}$ gate under the coherent errors corresponding to the deviations. The resulting gate infidelities are $2\times 10^{-6}$ for amplitude errors and $2\times 10^{-5}$ for phase errors, which are significantly lower than typical fault-tolerance thresholds such as those of the surface code. These results demonstrate that the amplitude and phase stability of QuEL-1 SE enables reliable long-duration quantum operations, thus highlighting its utility as a scalable control platform for superconducting and other qubit modalities. |
| title | Microwave Output Stabilization of a Qubit Controller via Device-Level Temperature Control |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2511.04397 |