Magnetic-Field-Compatible Superconducting Transmon Qubit

A. Kringhøj; T. W. Larsen; O. Erlandsson; W. Uilhoorn; J. G. Kroll; M. Hesselberg; R. P. G. McNeil; P. Krogstrup; L. Casparis; C. M. Marcus; K. D. Petersson

doi:10.1103/PhysRevApplied.15.054001

Magnetic-Field-Compatible Superconducting Transmon Qubit

Mesoscale and Nanoscale Physics 2021-05-12 v1 Superconductivity

Authors: A. Kringhøj , T. W. Larsen , O. Erlandsson , W. Uilhoorn , J. G. Kroll , M. Hesselberg , R. P. G. McNeil , P. Krogstrup , L. Casparis , C. M. Marcus , K. D. Petersson

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Abstract

We present a hybrid semiconductor-based superconducting qubit device which remains coherent at magnetic fields up to 1 T. The qubit transition frequency exhibits periodic oscillations with magnetic field, consistent with interference effects due to the magnetic flux threading the cross section of the proximitized semiconductor nanowire junction. As induced superconductivity revives, additional coherent modes emerge at high magnetic fields, which we attribute to the interaction of the qubit and low-energy Andreev states.

Keywords

circuit quantum electrodynamics superconducting qubits superconductivity

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@article{arxiv.2101.05194,
  title  = {Magnetic-Field-Compatible Superconducting Transmon Qubit},
  author = {A. Kringhøj and T. W. Larsen and O. Erlandsson and W. Uilhoorn and J. G. Kroll and M. Hesselberg and R. P. G. McNeil and P. Krogstrup and L. Casparis and C. M. Marcus and K. D. Petersson},
  journal= {arXiv preprint arXiv:2101.05194},
  year   = {2021}
}

Magnetic-Field-Compatible Superconducting Transmon Qubit

Abstract

Keywords

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