Ultra-high Q > 10<sup>10</sup> superconducting 3D cavities for quantum computing and quantum memory

ORAL

Abstract

3D superconducting radio frequency (SRF) cavities with very high Q factors of 1010-1011 are routinely used in modern particle accelerators. These are cavities made of bulk niobium and prepared with specialized surface processing techniques based on the detailed understanding of various Q-limiting mechanism developed in SRF over the past several decades. We have merged the advantages of high Q SRF with state-of-the-art transmon qubit, and in this contribution we report the first 'quantum' regime (T<20 mK, N<~10 photons) measurements of high Q bare SRF cavities, as well as SRF cavity-transmon qubit system performance (coherence time etc), demonstrating the high potential of this approach for both 3D cQED quantum computation and quantum memory.

*Fermilab is operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.

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Presenters

  • Alexander Romanenko

    • Fermi National Accelerator Laboratory
    • Fermi National Laboratory

Authors

  • Alexander Romanenko

    • Fermi National Accelerator Laboratory
    • Fermi National Laboratory

  • Mohamed Hassan

    • Fermi National Accelerator Laboratory

  • Roman Pilipenko

    • Fermi National Accelerator Laboratory

  • Mattia Checchin

    • Fermi National Accelerator Laboratory

  • Dmitri Sergatskov

    • Fermi National Accelerator Laboratory

  • Saravan Chandrasekaran

    • Fermi National Accelerator Laboratory

  • Chris Wilen

    • Physics, University of Wisconsin - Madison
    • Univ of Wisconsin, Madison

  • Robert McDermott

    • Univ of Wisconsin, Madison
    • Physics, University of Wisconsin - Madison
    • Physics, University of Wisconsin-Madison
    • Physics, Univ of Wisconsin-Madison
    • Physics, University of Wisconsin Madison
    • University of Wisconsin-Madison