Publikation:

Natural heavy-hole flopping mode qubit in germanium

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2021

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http://nbn-resolving.de/urn:nbn:de:bsz:352-2-19g4jtdaxok4q5
DOI (zitierfähiger Link)
https://doi.org/10.1103/PhysRevResearch.3.013194
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http://arxiv.org/abs/2012.10214

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CC BY 4.0

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Published

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Physical Review Research. American Physical Society. 2021, 3(1), 013194. eISSN 2643-1564. Available under: doi: 10.1103/PhysRevResearch.3.013194

Zusammenfassung

Flopping mode qubits in double quantum dots (DQDs) allow for coherent spin-photon hybridization and fast qubit gates when coupled to either an alternating external or a quantized cavity electric field. To achieve this, however, electronic systems rely on synthetic spin-orbit interaction (SOI) by means of a magnetic field gradient as a coupling mechanism. Here we theoretically show that this challenging experimental setup can be avoided in heavy-hole (HH) systems in germanium (Ge) by utilizing the sizeable cubic Rashba SOI. We argue that the resulting natural flopping mode qubit possesses highly tunable spin coupling strengths that allow for one- and two-qubit gate times in the nanosecond range when the system is designed to function in an optimal operation mode which we quantify.

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530 Physik

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ISO 690MUTTER, Philipp M., Guido BURKARD, 2021. Natural heavy-hole flopping mode qubit in germanium. In: Physical Review Research. American Physical Society. 2021, 3(1), 013194. eISSN 2643-1564. Available under: doi: 10.1103/PhysRevResearch.3.013194
BibTex
@article{Mutter2021Natur-53398,
  year={2021},
  doi={10.1103/PhysRevResearch.3.013194},
  title={Natural heavy-hole flopping mode qubit in germanium},
  number={1},
  volume={3},
  journal={Physical Review Research},
  author={Mutter, Philipp M. and Burkard, Guido},
  note={Article Number: 013194}
}
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