Spin Dynamics of a Solid-State Qubit in Proximity to a Superconductor

Richard Monge, Tom Delord, Nicholas V. Proscia, Zav Shotan, Harishankar Jayakumar, Jacob Henshaw, Pablo R. Zangara, Artur Lozovoi, Daniela Pagliero, Pablo D. Esquinazi, Toshu An, Inti Sodemann, Vinod M. Menon, Carlos A. Meriles

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A broad effort is underway to understand and harness the interaction between superconductors and spin-active color centers with an eye on hybrid quantum devices and novel imaging modalities of superconducting materials. Most work, however, overlooks the interplay between either system and the environment created by the color center host. Here we use a diamond scanning probe to investigate the spin dynamics of a single nitrogen-vacancy (NV) center proximal to a superconducting film. We find that the presence of the superconductor increases the NV spin coherence lifetime, a phenomenon we tentatively rationalize as a change in the electric noise due to a superconductor-induced redistribution of charge carriers near induced redistribution of charge carriers near the NV. We then build on these findings to demonstrate transverse-relaxation-time-weighted imaging of the superconductor film. These results shed light on the dynamics governing the spin coherence of shallow NVs, and promise opportunities for new forms of noise spectroscopy and imaging of superconductors.

Original languageEnglish (US)
Pages (from-to)422-428
Number of pages7
JournalNano letters
Issue number2
StatePublished - Jan 25 2023

Bibliographical note

Funding Information:
The authors acknowledge useful discussions with P. Ghaemi and T. Brick. R.M. acknowledges support from the National Science Foundation through grant NSF-1914945. Work by T.D and V.M.M. was supported by the National Science Foundation under grant NSF-QIITAQS-1936351. Work by N.P., Z.S., H.J., J.H., and P.R.Z. was supported by the National Science Foundation under grant NSF-1726573. Work by A.L., D.P., and C.A.M was supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Co-design Center for Quantum Advantage (C2QA) under contract number DE-SC0012704. All authors acknowledge access to the facilities and research infrastructure of the NSF CREST IDEALS, grant number NSF-HRD-1547830.

Publisher Copyright:
© 2023 American Chemical Society.


  • Diamond
  • electric and magnetic noise
  • nitrogen-vacancy centers
  • spin coherence times
  • superconductor

PubMed: MeSH publication types

  • Journal Article


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