Closed-loop control of a GaAs-based singlet-triplet spin qubit with 99.5% gate fidelity and low leakage

@article{Cerfontaine2020ClosedloopCO,
  title={Closed-loop control of a GaAs-based singlet-triplet spin qubit with 99.5\% gate fidelity and low leakage},
  author={Pascal Cerfontaine and T. Botzem and J. Ritzmann and S. Humpohl and A. Ludwig and D. Schuh and D. Bougeard and A. Wieck and H. Bluhm},
  journal={Nature Communications},
  year={2020},
  volume={11}
}
Semiconductor spin qubits have recently seen major advances in coherence time and control fidelities, leading to a single-qubit performance that is on par with other leading qubit platforms. Most of this progress is based on microwave control of single spins in devices made of isotopically purified silicon. For controlling spins, the exchange interaction is an additional key ingredient which poses new challenges for high-fidelity control. Here, we demonstrate exchange-based single-qubit gates… Expand

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