High-fidelity quantum gates in Si/SiGe double quantum dots

Russ, Maximilian; Zajac, David M.; Sigillito, Anthony J.; Borjans, Felix; Taylor, Jacob M.; Petta, Jason R.; Burkard, Guido

High-fidelity quantum gates in Si/SiGe double quantum dots

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Datum

2018

Autor:innen

Russ, Maximilian

Zajac, David M.

Sigillito, Anthony J.

Borjans, Felix

Taylor, Jacob M.

Petta, Jason R.

Burkard, Guido

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. 2018, 97(8), 085421. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.97.085421

Zusammenfassung

Motivated by recent experiments of Zajac et al. [Science 359, 439 (2018)], we theoretically describe high-fidelity two-qubit gates using the exchange interaction between the spins in neighboring quantum dots subject to a magnetic field gradient. We use a combination of analytical calculations and numerical simulations to provide the optimal pulse sequences and parameter settings for the gate operation. We present a synchronization method which avoids detrimental spin flips during the gate operation and provide details about phase mismatches accumulated during the two-qubit gates which occur due to residual exchange interaction, nonadiabatic pulses, and off-resonant driving. By adjusting the gate times, synchronizing the resonant and off-resonant transitions, and compensating these phase mismatches by phase control, the overall gate fidelity can be increased significantly.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

RUSS, Maximilian, David M. ZAJAC, Anthony J. SIGILLITO, Felix BORJANS, Jacob M. TAYLOR, Jason R. PETTA, Guido BURKARD, 2018. High-fidelity quantum gates in Si/SiGe double quantum dots. In: Physical Review B. 2018, 97(8), 085421. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.97.085421

BibTex

@article{Russ2018Highf-41584,
  year={2018},
  doi={10.1103/PhysRevB.97.085421},
  title={High-fidelity quantum gates in Si/SiGe double quantum dots},
  number={8},
  volume={97},
  issn={2469-9950},
  journal={Physical Review B},
  author={Russ, Maximilian and Zajac, David M. and Sigillito, Anthony J. and Borjans, Felix and Taylor, Jacob M. and Petta, Jason R. and Burkard, Guido},
  note={Article Number: 085421}
}

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