Publikation:

Dynamics of Hole Singlet-Triplet Qubits with Large g-Factor Differences

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2022

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Jirovec, Daniel
Hofmann, Andrea
Crippa, Alessandro
Rychetsky, Marek
Craig, David L.
Kukucka, Josip
Martins, Frederico
Ballabio, Andrea
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Physical review letters. American Physical Society (APS). 2022, 128(12), 126803. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.128.126803

Zusammenfassung

The spin-orbit interaction permits to control the state of a spin qubit via electric fields. For holes it is particularly strong, allowing for fast all electrical qubit manipulation, and yet an in-depth understanding of this interaction in hole systems is missing. Here we investigate, experimentally and theoretically, the effect of the cubic Rashba spin-orbit interaction on the mixing of the spin states by studying singlet-triplet oscillations in a planar Ge hole double quantum dot. Landau-Zener sweeps at different magnetic field directions allow us to disentangle the effects of the spin-orbit induced spin-flip term from those caused by strongly site-dependent and anisotropic quantum dot g tensors. Our work, therefore, provides new insights into the hole spin-orbit interaction, necessary for optimizing future qubit experiments.

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ISO 690JIROVEC, Daniel, Philipp M. MUTTER, Andrea HOFMANN, Alessandro CRIPPA, Marek RYCHETSKY, David L. CRAIG, Josip KUKUCKA, Frederico MARTINS, Andrea BALLABIO, Guido BURKARD, 2022. Dynamics of Hole Singlet-Triplet Qubits with Large g-Factor Differences. In: Physical review letters. American Physical Society (APS). 2022, 128(12), 126803. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.128.126803
BibTex
@article{Jirovec2022-03-25Dynam-57503,
  year={2022},
  doi={10.1103/PhysRevLett.128.126803},
  title={Dynamics of Hole Singlet-Triplet Qubits with Large g-Factor Differences},
  number={12},
  volume={128},
  issn={0031-9007},
  journal={Physical review letters},
  author={Jirovec, Daniel and Mutter, Philipp M. and Hofmann, Andrea and Crippa, Alessandro and Rychetsky, Marek and Craig, David L. and Kukucka, Josip and Martins, Frederico and Ballabio, Andrea and Burkard, Guido},
  note={Article Number: 126803}
}
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