Resetting a Superconducting Qubit with a Compact Colder Resistive Dissipator below the Qubit Frequency
Abstract
Efficient qubit reset has become a key requirement for large-scale superconducting quantum processors, as initialization fidelity increasingly lags behind gate performance and quantum error correction demands rapid, high-fidelity state re-initialization. This work proposes a compact on-chip dissipator consisting of two transmon dissipation modes and a thin-film resistor, and experimentally demonstrates an unconditional reset protocol. With no additional control lines and negligible impact on the qubit T1, the effective temperature of the transmon qubit is reduced from $49$~mK to $35$~mK. Quantum process tomography is employed to benchmark the reset process, achieving a process error of $0.0028$. This reset protocol is robust to pulse parameter deviations, thereby relaxing calibration requirements. The dissipator architecture provides a practical, calibration-friendly reset solution for large-scale superconducting quantum processors.
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BibTeX
@misc{tian2026resetting,
title = {{Resetting a Superconducting Qubit with a Compact Colder Resistive Dissipator below the Qubit Frequency}},
author = {Jiajia Tian and Meiling Li and Weijie Sun and Yanjun Ma and Zhenyu Mi and Fei Yan and Huikai Xu and Pei Liu and Guangming Xue and Haifeng Yu},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.06216},
eprint = {2611.06216},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.06216},
}
RIS
TY - UNPB
TI - Resetting a Superconducting Qubit with a Compact Colder Resistive Dissipator below the Qubit Frequency
AU - Jiajia Tian
AU - Meiling Li
AU - Weijie Sun
AU - Yanjun Ma
AU - Zhenyu Mi
AU - Fei Yan
AU - Huikai Xu
AU - Pei Liu
AU - Guangming Xue
AU - Haifeng Yu
PY - 2026
DA - 2026/11/04
PB - arXiv
DO - 10.48550/arxiv.2611.06216
UR - https://arxiv.org/abs/2611.06216
AB - Efficient qubit reset has become a key requirement for large-scale superconducting quantum processors, as initialization fidelity increasingly lags behind gate performance and quantum error correction demands rapid, high-fidelity state re-initialization. This work proposes a compact on-chip dissipator consisting of two transmon dissipation modes and a thin-film resistor, and experimentally demonstrates an unconditional reset protocol. With no additional control lines and negligible impact on the qubit T_1, the effective temperature of the transmon qubit is reduced from $49$~mK to $35$~mK. Quantum process tomography is employed to benchmark the reset process, achieving a process error of $0.0028$. This reset protocol is robust to pulse parameter deviations, thereby relaxing calibration requirements. The dissipator architecture provides a practical, calibration-friendly reset solution for large-scale superconducting quantum processors.
ER -