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Trapped Ion Quantum Computing

High level ab initio calculations of the optical gap of small silicon quantum dots.

PubMed
Authors: Garoufalis CS, Zdetsis AD, Grimme S

Year

2001

Paper ID

13179

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

104

Citations

168

Abstract

Using state of the art time-dependent density functional theory and multireference second-order perturbation theory, we have accurately calculated (within 0.3 eV) in real space the optical gap of small silicon quantum dots, with diameters up to 25 A. Our results, which support the quantum confinement hypothesis, are in excellent agreement with recent and earlier experimental data on oxygen-free samples and the conclusions of Wilcoxon et al. [Phys. Rev. B 60, 2704 (1999)]. We have found that the diameter of the smallest dot, which could emit photoluminescence in the visible region of the spectrum, is around 22 A. Our work can resolve existing controversies and bridge diverse experimental and theoretical results.

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  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
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  • Using state of the art time-dependent density functional theory and multireference second-order perturbation theory, we have accurately calculated (within 0.3 eV) in real space...

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References & Citation Signals

[1] DOI https://doi.org/10.1103/PhysRevLett.87.276402 [2] Publisher https://pubmed.ncbi.nlm.nih.gov/11800900/

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