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A cryogenic on-chip microwave pulse generator for large-scale superconducting quantum computing

Author

Listed:
  • Zenghui Bao

    (Tsinghua University)

  • Yan Li

    (Tsinghua University)

  • Zhiling Wang

    (Tsinghua University)

  • Jiahui Wang

    (Tsinghua University)

  • Jize Yang

    (Tsinghua University)

  • Haonan Xiong

    (Tsinghua University)

  • Yipu Song

    (Tsinghua University
    Hefei National Laboratory)

  • Yukai Wu

    (Tsinghua University
    Hefei National Laboratory)

  • Hongyi Zhang

    (Tsinghua University
    Hefei National Laboratory)

  • Luming Duan

    (Tsinghua University
    Hefei National Laboratory)

Abstract

For superconducting quantum processors, microwave signals are delivered to each qubit from room-temperature electronics to the cryogenic environment through coaxial cables. Limited by the heat load of cabling and the massive cost of electronics, such an architecture is not viable for millions of qubits required for fault-tolerant quantum computing. Monolithic integration of the control electronics and the qubits provides a promising solution, which, however, requires a coherent cryogenic microwave pulse generator that is compatible with superconducting quantum circuits. Here, we report such a signal source driven by digital-like signals, generating pulsed microwave emission with well-controlled phase, intensity, and frequency directly at millikelvin temperatures. We showcase high-fidelity readout of superconducting qubits with the microwave pulse generator. The device demonstrated here has a small footprint, negligible heat load, great flexibility to operate, and is fully compatible with today’s superconducting quantum circuits, thus providing an enabling technology for large-scale superconducting quantum computers.

Suggested Citation

  • Zenghui Bao & Yan Li & Zhiling Wang & Jiahui Wang & Jize Yang & Haonan Xiong & Yipu Song & Yukai Wu & Hongyi Zhang & Luming Duan, 2024. "A cryogenic on-chip microwave pulse generator for large-scale superconducting quantum computing," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50333-w
    DOI: 10.1038/s41467-024-50333-w
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