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Quadrupolar Exchange-Only Spin Qubit

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2018

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Petta, Jason R.

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https://doi.org/10.1103/PhysRevLett.121.177701
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http://arxiv.org/abs/1807.10471

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Physical Review Letters. 2018, 121(17), 177701. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.121.177701

Zusammenfassung

We propose a quadrupolar exchange-only spin qubit that is highly robust against charge noise and nuclear spin dephasing, the dominant decoherence mechanisms in quantum dots. The qubit consists of four electrons trapped in three quantum dots, and operates in a decoherence-free subspace to mitigate dephasing due to nuclear spins. To reduce sensitivity to charge noise, the qubit can be completely operated at an extended charge noise sweet spot that is first-order insensitive to electrical fluctuations. Because of on-site exchange mediated by the Coulomb interaction, the qubit energy splitting is electrically controllable and can amount to several GHz even in the “off” configuration, making it compatible with conventional microwave cavities.

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ISO 690RUSS, Maximilian, Jason R. PETTA, Guido BURKARD, 2018. Quadrupolar Exchange-Only Spin Qubit. In: Physical Review Letters. 2018, 121(17), 177701. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.121.177701
BibTex
@article{Russ2018-07-27T07:55:25ZQuadr-43694,
  year={2018},
  doi={10.1103/PhysRevLett.121.177701},
  title={Quadrupolar Exchange-Only Spin Qubit},
  number={17},
  volume={121},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Russ, Maximilian and Petta, Jason R. and Burkard, Guido},
  note={Article Number: 177701}
}
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