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Trapped Ion Quantum Computing Superconducting Qubits

Superconducting Parallel-Plate Resonators for the Detection of Single Electron Spins

arXiv
Authors: André Pscherer, Jannes Liersch, Patrick Abgrall, Andrew D. Beyer, Fabien Defrance, Sunil R. Gowala, Hélène Le Sueur, James O'Sullivan, Emmanuel Flurin, Patrice Bertet

Year

2026

Paper ID

35666

Status

Preprint

Abstract Read

~2 min

Abstract Words

88

Citations

N/A

Abstract

We introduce a multilayer superconducting microwave resonator with sub-Ohm impedance optimized for high coupling strength to single electron spins. The design minimizes the magnetic far-field and therefore achieves a Purcell factor FP > 1015. We show several ways to fabricate this type of resonator and present resonators with an intrinsic Q-factor exceeding 2 cdot 104 at the single-photon level. We further characterize these resonators in magnetic fields up to 500 mT. Finally, we evaluate the impact of the achievable Purcell factor on single-spin detection through photon counting and dispersive readout.

Why This Paper Matters

  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
  • It adds a 2026 reference point for readers tracking recent quantum research.
  • We introduce a multilayer superconducting microwave resonator with sub-Ohm impedance optimized for high coupling strength to single electron spins.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2603.25258 [2] arXiv https://arxiv.org/abs/2603.25258 [3] Publisher https://arxiv.org/abs/2603.25258

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