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Measurement and control of quasiparticle dynamics in a superconducting qubit

Author

Listed:
  • C. Wang

    (Yale University)

  • Y. Y. Gao

    (Yale University)

  • I. M. Pop

    (Yale University)

  • U. Vool

    (Yale University)

  • C. Axline

    (Yale University)

  • T. Brecht

    (Yale University)

  • R. W. Heeres

    (Yale University)

  • L. Frunzio

    (Yale University)

  • M. H. Devoret

    (Yale University)

  • G. Catelani

    (Peter Grünberg Institut (PGI-2), Forschungszentrum Jülich)

  • L. I. Glazman

    (Yale University)

  • R. J. Schoelkopf

    (Yale University)

Abstract

Superconducting circuits have attracted growing interest in recent years as a promising candidate for fault-tolerant quantum information processing. Extensive efforts have always been taken to completely shield these circuits from external magnetic fields to protect the integrity of the superconductivity. Here we show vortices can improve the performance of superconducting qubits by reducing the lifetimes of detrimental single-electron-like excitations known as quasiparticles. Using a contactless injection technique with unprecedented dynamic range, we quantitatively distinguish between recombination and trapping mechanisms in controlling the dynamics of residual quasiparticle, and show quantized changes in quasiparticle trapping rate because of individual vortices. These results highlight the prominent role of quasiparticle trapping in future development of superconducting qubits, and provide a powerful characterization tool along the way.

Suggested Citation

  • C. Wang & Y. Y. Gao & I. M. Pop & U. Vool & C. Axline & T. Brecht & R. W. Heeres & L. Frunzio & M. H. Devoret & G. Catelani & L. I. Glazman & R. J. Schoelkopf, 2014. "Measurement and control of quasiparticle dynamics in a superconducting qubit," Nature Communications, Nature, vol. 5(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6836
    DOI: 10.1038/ncomms6836
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    Cited by:

    1. V. Iaia & J. Ku & A. Ballard & C. P. Larson & E. Yelton & C. H. Liu & S. Patel & R. McDermott & B. L. T. Plourde, 2022. "Phonon downconversion to suppress correlated errors in superconducting qubits," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    2. Suhas Ganjam & Yanhao Wang & Yao Lu & Archan Banerjee & Chan U Lei & Lev Krayzman & Kim Kisslinger & Chenyu Zhou & Ruoshui Li & Yichen Jia & Mingzhao Liu & Luigi Frunzio & Robert J. Schoelkopf, 2024. "Surpassing millisecond coherence in on chip superconducting quantum memories by optimizing materials and circuit design," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    3. Shingo Kono & Jiahe Pan & Mahdi Chegnizadeh & Xuxin Wang & Amir Youssefi & Marco Scigliuzzo & Tobias J. Kippenberg, 2024. "Mechanically induced correlated errors on superconducting qubits with relaxation times exceeding 0.4 ms," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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