Scalable packaging for superconducting qubits with vertical wiring

ORAL

Abstract

Superconducting quantum circuits are one of the most promising platforms for realizing a large-scale quantum computer. To implement realistic quantum error correction codes, such as surface codes, we aim at integrating a two-dimensional array of superconducting qubits in a scalable way. Therefore, a natural strategy for the chip packaging is to use the third dimension for the wiring. Here we demonstrate a packaging scheme for a qubit chip, where coaxial cables for the control and readout of qubits are vertically connected to the backside of the chip. The electrical contacts between the superconducting circuits and coaxial cables are provided by spring probes and superconducting through-silicon via. We will present the design and performance of the chip and package.

*This work was supported by JST ERATO (Grant No. JPMJER1601) and MEXT Q- LEAP (Grant No. JPMXS0118068682).

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Presenters

  • Shuhei Tamate

    • Research Center for Advanced Science and Technology, The University of Tokyo
    • The University of Tokyo

Authors

  • Shuhei Tamate

    • Research Center for Advanced Science and Technology, The University of Tokyo
    • The University of Tokyo

  • Yutaka Tabuchi

    • Research Center for Advanced Science and Technology, The University of Tokyo
    • The University of Tokyo

  • Laszlo Szikszai

    • Center for Emergent Matter Science, RIKEN

  • Koichi Kusuyama

    • Center for Emergent Matter Science, RIKEN

  • Kun Zuo

    • Center for Emergent Matter Science, RIKEN
    • RIKEN
    • Center for Emergent Matter Science (CEMS), RIKEN

  • Yuji Hishida

    • National Institute of Information and Communications Technology

  • Wei Qiu

    • National Institute of Information and Communications Technology
    • Advanced ICT research institute, NICT
    • Advanced ICT Research Institute, National Institute of Information and Communications Technology

  • Hirotaka Terai

    • National Institute of Information and Communications Technology
    • Advanced ICT research institute, NICT
    • Advanced ICT Research Institute, National Institute of Information and Communications Technology

  • Masahiro Ukibe

    • National Institute of Advanced Industrial Science and Technology

  • Go Fujii

    • National Institute of Advanced Industrial Science and Technology

  • Kazumasa Makise

    • National Institute of Advanced Industrial Science and Technology

  • Naoya Watanabe

    • National Institute of Advanced Industrial Science and Technology

  • Katsuya Kikuchi

    • National Institute of Advanced Industrial Science and Technology

  • Yasunobu Nakamura

    • Research Center for Advanced Science and Technology, The University of Tokyo
    • Univ of Tokyo
    • RIKEN
    • RCAST, The University of Tokyo
    • The University of Tokyo