Toward the near-quantum-limited multiplexed readout of hundreds of resonators with a KI-TWPA

ORAL  · Invited

Abstract

As the number of qubits in quantum computers continues to increase, their readout architecture will face the same technical challenge as arrays of transition-edge sensors and microwave kinetic inductance detectors: namely, what is a scalable solution for the quantum-limited readout of hundreds and thousands of frequency-multiplexed resonators? For both qubit and sensor applications, the cooling power required to brute-force scale the existing cryogenic semiconductor amplifier technology is a major obstacle. In this context, traveling-wave parametric amplifiers (TWPAs) have emerged as a more power-efficient solution [1], with nearly quantum-limited noise performance. In this talk, I will discuss the design and characterization of highly scalable readout architectures leveraging TWPAs, and will present our efforts to measure an array of 64 nonlinear resonators with a kinetic-inductance TWPA, whose added noise approaches the quantum limit.

 

[1]: arXiv: 2110.08142 (2021)

*We gratefully acknowledge support from the NIST Program on Scalable Superconducting Computing, NASA under Grant No. NNH18ZDA001N-APRA, and the DOE Accelerator and Detector Research Program under Grant No. 89243020SSC000058.

–

Publication: arXiv preprint arXiv: 2110.08142 (2021)

Presenters

  • Maxime Malnou

    • National Institute of Standards and Technology

Authors

  • Maxime Malnou

    • National Institute of Standards and Technology

  • Jose Aumentado

    • National Institute of Standards and Technology Boulder
    • National Institute of Standards and Technology, Boulder, Colorado, 80305, USA
    • National Institute of Standards and Technology

  • John B Mates

    • National Institute of Standards and Technology

  • Douglas A Benett

    • National Institute of Standards and Technology

  • Michael R Vissers

    • National Institute of Standards and Technology
    • NIST

  • Jordan D Wheeler

    • National Institute of Standards and Technology

  • Johannes Hubmayr

    • National Institute of Standards and Technology

  • Joel N Ullom

    • National Institute of Standards and Technology
    • National Institute of Standards and Technology Boulder; University of Colorado, Boulder
    • National Institute of Standards and Technology Boulder

  • Jiansong Gao

    • National Institute of Standards and Technology