Input-output theory for spin-photon coupling in Si double quantum dots

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2017
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Benito, Monica
Mi, Xiao
Taylor, Jacob M.
Petta, Jason R.
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Physical Review B. 2017, 96(23), 235434. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.96.235434
Zusammenfassung

The interaction of qubits via microwave frequency photons enables long-distance qubit-qubit coupling and facilitates the realization of a large-scale quantum processor. However, qubits based on electron spins in semiconductor quantum dots have proven challenging to couple to microwave photons. In this theoretical work we show that a sizable coupling for a single electron spin is possible via spin-charge hybridization using a magnetic field gradient in a silicon double quantum dot. Based on parameters already shown in recent experiments, we predict optimal working points to achieve a coherent spin-photon coupling, an essential ingredient for the generation of long-range entanglement. Furthermore, we employ input-output theory to identify observable signatures of spin-photon coupling in the cavity output field, which may provide guidance to the experimental search for strong coupling in such spin-photon systems and opens the way to cavity-based readout of the spin qubit.

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ISO 690BENITO, Monica, Xiao MI, Jacob M. TAYLOR, Jason R. PETTA, Guido BURKARD, 2017. Input-output theory for spin-photon coupling in Si double quantum dots. In: Physical Review B. 2017, 96(23), 235434. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.96.235434
BibTex
@article{Benito2017Input-41515,
  year={2017},
  doi={10.1103/PhysRevB.96.235434},
  title={Input-output theory for spin-photon coupling in Si double quantum dots},
  number={23},
  volume={96},
  issn={2469-9950},
  journal={Physical Review B},
  author={Benito, Monica and Mi, Xiao and Taylor, Jacob M. and Petta, Jason R. and Burkard, Guido},
  note={Article Number: 235434}
}
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