Tensor Monopoles in superconducting systems

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Quantum. Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften. 2021, 5, 601. eISSN 2521-327X. Available under: doi: 10.22331/q-2021-12-07-601
Zusammenfassung

Topology in general but also topological objects such as monopoles are a central concept in physics. They are prime examples for the intriguing physics of gauge theories and topological states of matter. Vector monopoles are already frequently discussed such as the well-established Dirac monopole in three dimensions. Less known are tensor monopoles giving rise to tensor gauge fields. Here we report that tensor monopoles can potentially be realized in superconducting multi-terminal systems using the phase differences between superconductors as synthetic dimensions. In a first proposal we suggest a circuit of superconducting islands featuring charge states to realize a tensor monopole. As a second example we propose a triple dot system coupled to multiple superconductors that also gives rise to such a topological structure. All proposals can be implemented with current experimental means and the monopole readily be detected by measuring the quantum geometry.

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530 Physik
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tensor gauge fields, superconducting multi-terminal systems, phase differences
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ISO 690WEISBRICH, Hannes, Markus BESTLER, Wolfgang BELZIG, 2021. Tensor Monopoles in superconducting systems. In: Quantum. Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften. 2021, 5, 601. eISSN 2521-327X. Available under: doi: 10.22331/q-2021-12-07-601
BibTex
@article{Weisbrich2021-09-07T15:02:30ZTenso-54838.2,
  year={2021},
  doi={10.22331/q-2021-12-07-601},
  title={Tensor Monopoles in superconducting systems},
  volume={5},
  journal={Quantum},
  author={Weisbrich, Hannes and Bestler, Markus and Belzig, Wolfgang},
  note={Article Number: 601}
}
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