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Superconducting Qubits

Observation of individual vortex penetration in a coplanar superconducting resonator

arXiv
Authors: Kirill Shulga, Shunsuke Nishimura, Pavel A. Volkov, Ryota Hasegawa, Miu Hirano, Takeyuki Tsuji, Takayuki Iwasaki, Mutsuko Hatano, Kento Sasaki, Kensuke Kobayashi

Year

2025

Paper ID

16439

Status

Preprint

Abstract Read

~2 min

Abstract Words

99

Citations

N/A

Abstract

We demonstrate the detection and control of individual Abrikosov vortices in superconducting microwave resonators. λ/4 resonators with a narrowed region near the grounded end acting as a vortex trap were fabricated and studied using microwave transmission spectroscopy at millikelvin temperatures. Sharp stepwise drops in resonance frequency are detected as a function of increasing external magnetic field, attributed to the entry of individual Abrikosov vortices in the narrow region. This interpretation is confirmed by NV center magnetometry revealing discrete vortex entry events on increasing field. Our results establish a method to investigate and manipulate the states of Abrikosov vortices with microwaves.

Why This Paper Matters

  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
  • It adds a 2025 reference point for readers tracking recent quantum research.
  • We demonstrate the detection and control of individual Abrikosov vortices in superconducting microwave resonators.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2512.00790 [2] arXiv https://arxiv.org/abs/2512.00790 [3] Publisher https://arxiv.org/abs/2512.00790

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