Single photon detector measurement of a membrane transducer in a dilution refrigerator

ORAL

Abstract

Bidirectional microwave-to-optical frequency transducers will allow superconducting qubit nodes to be connected via networks of fiber optic cables. Transducers based on MHz-frequency Si3N4 membranes are promising platforms for this operation, and have demonstrated field-high bidirectional throughputs with close to single photon added noise [1]. However, for either heralded transduction or optical non-Gaussian mechanical state preparation, these membranes must be connected to an optical nonlinear resource like a single photon detector. I will present on technical improvements to measure a 5 MHz mechanical resonator in a dilution refrigerator while filtering the signal for single photon detention. Additionally, I will show noise thermometry of that device using the single photon detectors.

[1] M. D. Urmey, S. Dickson, K. Adachi, S. Mittal, L. G. Talamo, A. Kyle, N. E. Frattini, S.-X. Lin, K. W. Lehnert, C. A. Regal, High-throughput electro-optic upconversion and downconversion with few-photon added noise, arXiv preprint arXiv:2507.09873 (2025).

*Supported by JILA PFC under NSF award PHY-2317149, and by Army Research Office grant W911NF2310376, and by the NDSEG Fellowship Program.

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Presenters

  • Sarah Dickson

    • JILA

Authors

  • Sarah Dickson

    • JILA

  • Luca G Talamo

    • University of Colorado, Boulder
    • JILA, University of Colorado Boulder

  • Kazemi Adachi

    • JILA

  • Max Olberding

    • JILA

  • Maxwell D Urmey

    • Quantinuum
    • JILA

  • Sarang Mittal

    • JILA
    • Microsoft

  • Akira Kyle

    • University of Colorado, Boulder

  • Sheng-Xiang Lin

    • JILA

  • Konrad W Lehnert

    • Yale University

  • Cindy A Regal

    • JILA, University of Colorado Boulder
    • JILA, NIST and University of Colorado, Boulder