Validity of the single-particle description and charge noise resilience for multielectron quantum dots

Abstract

We construct an optimal set of single-particle states for few-electron quantum dots (QDs) using the method of natural orbitals (NOs). The NOs include also the effects of the Coulomb repulsion between electrons. We find that they agree well with the noniteracting orbitals for GaAs QDs of realistic parameters, while the Coulomb interactions only rescale the radius of the NOs compared to the noninteracting case. We use NOs to show that four-electron QDs are less susceptible to charge noise than their two-electron counterparts.

11+ pages, 5 figures

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Cited by in corpus (4)

• Molecular formations and spectra due to electron correlations in three-electron hybrid double-well qubits
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• Preparation and Readout of Multielectron High-Spin States in a Gate-Defined GaAs/AlGaAs Quantum Dot
• On the validity of microscopic calculations of double-quantum-dot spin qubits based on Fock-Darwin states