A Low-Noise and High-Stability DC Source for Superconducting Quantum Circuits
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arXiv
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2025
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| author | Sun, Daxiong Zhang, Jiawei Huang, Peisheng Zhang, Yubin Guo, Zechen Chen, Tingjin Wang, Rui Sun, Xuandong Zhang, Jiajian Huang, Wenhui Qiu, Jiawei Chu, Ji Tao, Ziyu Guo, Weijie Linpeng, Xiayu Jiang, Ji Niu, Jingjing Zhong, Youpeng Yu, Dapeng |
| author_facet | Sun, Daxiong Zhang, Jiawei Huang, Peisheng Zhang, Yubin Guo, Zechen Chen, Tingjin Wang, Rui Sun, Xuandong Zhang, Jiajian Huang, Wenhui Qiu, Jiawei Chu, Ji Tao, Ziyu Guo, Weijie Linpeng, Xiayu Jiang, Ji Niu, Jingjing Zhong, Youpeng Yu, Dapeng |
| contents | With the rapid scaling of superconducting quantum processors, electronic control systems relying on commercial off-the-shelf instruments face critical bottlenecks in signal density, power consumption, and crosstalk mitigation. Here we present a custom dual-channel direct current (DC) source module (QPower) dedicated for large-scale superconducting quantum processors. The module delivers a voltage range of $\pm$7 V with 200 mA maximum current per channel, while achieving the following key performance benchmarks: noise spectral density of 20 nV/$\sqrt{\mathrm{Hz}}$ at 10 kHz, output ripple $<$500 $μ$V$_{\mathrm{pp}}$ within 20 MHz bandwidth, and long-term voltage drift $<$5 $μ$V$_{\mathrm{pp}}$ over 12 hours. Integrated into the control electronics of a 66-qubit quantum processor, QPower enables qubit coherence times of $T_1 = 87.6~μ\mathrm{s}$ and Ramsey $T_2 = 5.1~μ\mathrm{s}$, with qubit resonance frequency drift constrained to $\pm$40 kHz during 12-hour operation. This modular design is compact in size and efficient in energy consumption, providing a scalable DC source solution for intermediate-scale quantum processors with stringent noise and stability requirements, with potential extensions to other quantum hardware platforms and precision measurement. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_00297 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Low-Noise and High-Stability DC Source for Superconducting Quantum Circuits Sun, Daxiong Zhang, Jiawei Huang, Peisheng Zhang, Yubin Guo, Zechen Chen, Tingjin Wang, Rui Sun, Xuandong Zhang, Jiajian Huang, Wenhui Qiu, Jiawei Chu, Ji Tao, Ziyu Guo, Weijie Linpeng, Xiayu Jiang, Ji Niu, Jingjing Zhong, Youpeng Yu, Dapeng Quantum Physics With the rapid scaling of superconducting quantum processors, electronic control systems relying on commercial off-the-shelf instruments face critical bottlenecks in signal density, power consumption, and crosstalk mitigation. Here we present a custom dual-channel direct current (DC) source module (QPower) dedicated for large-scale superconducting quantum processors. The module delivers a voltage range of $\pm$7 V with 200 mA maximum current per channel, while achieving the following key performance benchmarks: noise spectral density of 20 nV/$\sqrt{\mathrm{Hz}}$ at 10 kHz, output ripple $<$500 $μ$V$_{\mathrm{pp}}$ within 20 MHz bandwidth, and long-term voltage drift $<$5 $μ$V$_{\mathrm{pp}}$ over 12 hours. Integrated into the control electronics of a 66-qubit quantum processor, QPower enables qubit coherence times of $T_1 = 87.6~μ\mathrm{s}$ and Ramsey $T_2 = 5.1~μ\mathrm{s}$, with qubit resonance frequency drift constrained to $\pm$40 kHz during 12-hour operation. This modular design is compact in size and efficient in energy consumption, providing a scalable DC source solution for intermediate-scale quantum processors with stringent noise and stability requirements, with potential extensions to other quantum hardware platforms and precision measurement. |
| title | A Low-Noise and High-Stability DC Source for Superconducting Quantum Circuits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2505.00297 |