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Resonator-mediated quantum gate between distant charge qubits

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2024

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Quantum Science and Technology. IOP Publishing. 2024, 9(4), 045048. eISSN 2058-9565. Verfügbar unter: doi: 10.1088/2058-9565/ad7756

Zusammenfassung

Strong charge-photon coupling allows the coherent coupling of a charge qubit, realized by a single charge carrier (either an electron or a hole) in a double quantum dot, to photons of a microwave resonator. Here, we theoretically demonstrate that, in the dispersive regime, the photons can mediate both an iSWAP gate as well as a √iSWAP gate between two distant charge qubits. We provide a thorough discussion of the impact of the dominant noise sources, resonator damping and charge qubit dephasing on the average gate fidelity. Assuming a state-of-the art resonator decay rate and charge qubit dephasing rate, the predicted average gate fidelities are below 90%. However, a decrease of the charge qubit dephasing rate by one order of magnitude is conjectured to result in gate fidelities surpassing 95%.

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530 Physik

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circuit quantum electrodynamics, double quantum dot charge qubit, entangling two-qubit gate, semiconductor, long distance interaction

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ISO 690KAYATZ, Florian, Jonas MIELKE, Guido BURKARD, 2024. Resonator-mediated quantum gate between distant charge qubits. In: Quantum Science and Technology. IOP Publishing. 2024, 9(4), 045048. eISSN 2058-9565. Verfügbar unter: doi: 10.1088/2058-9565/ad7756
BibTex
@article{Kayatz2024-10-01Reson-71161,
  year={2024},
  doi={10.1088/2058-9565/ad7756},
  title={Resonator-mediated quantum gate between distant charge qubits},
  number={4},
  volume={9},
  journal={Quantum Science and Technology},
  author={Kayatz, Florian and Mielke, Jonas and Burkard, Guido},
  note={Article Number: 045048}
}
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