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The Decoherence of GaAs Quantum Dot Qubit Due to Electron–Phonon Interactions

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Abstract

We investigate electron charge decoherence in a GaAs single-electron semiconductor quantum dot through electron–phonon interaction. We analytically and numerically evaluate decoherence time within the Lee–Low–Pines–Huybrecht variational calculation for all coupling strengths. The dependence of decoherence time on the electron-LO-phonon coupling strength and the size of quantum dot is investigated. Our results suggest that electron–phonon interaction has very important effects on charge decoherence.

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  1. Department of Electrical Engineering, Huzhou Vocational Technology College, Huzhou, 313000, China

    Shi-Hua Chen

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  1. Shi-Hua Chen
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Correspondence to Shi-Hua Chen.

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Chen, SH. The Decoherence of GaAs Quantum Dot Qubit Due to Electron–Phonon Interactions. J Low Temp Phys 172, 310–316 (2013). https://doi.org/10.1007/s10909-013-0876-8

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  • DOI: https://doi.org/10.1007/s10909-013-0876-8

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