Gate-Tunable Field-Compatible Fluxonium

Research output: Contribution to journalJournal articleResearchpeer-review


  • Marta Pita-Vidal
  • Arno Bargerbos
  • Chung-Kai Yang
  • David J. van Woerkom
  • Wolfgang Pfaff
  • Nadia Haider
  • Jeppesen, Peter Krogstrup
  • Leo P. Kouwenhoven
  • Gijs de Lange
  • Angela Kou

Hybrid superconducting circuits, which integrate nonsuperconducting elements into a circuit quantum electrodynamics (cQED) architecture, expand the possible applications of cQED. Building hybrid circuits that work in large magnetic fields presents even further possibilities, such as the probing of spin-polarized Andreev bound states and the investigation of topological superconductivity. Here we present a magnetic-field compatible hybrid fluxonium with an electrostatically tuned semiconducting nanowire as its nonlinear element. We operate the fluxonium in magnetic fields up to 1 T and use it to observe the phi(0)-Josephson effect. This combination of gate tunability and field compatibility opens avenues for the control of spin-polarized phenomena using superconducting circuits and enables the use of the fluxonium as a readout device for topological qubits.

Original languageEnglish
Article number064038
JournalPhysical Review Applied
Issue number6
Number of pages12
Publication statusPublished - 14 Dec 2020

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