Time-dependent configuration interaction approach for multielectron system confined in two-dimensional quantum dot

Takuma Okunishi, Richard Clark, Kyozaburo Takeda, Koichi Kusakabe, Norikazu Tomita

    Research output: Contribution to journalArticle

    Abstract

    We extend the static multireference description (resonant unrestricted Hartree-Fock) to a dynamical system in order to include the correlation effect dynamically. The resulting time-dependent (TD) Schrodinger equation is simplified into the time-developed rate equation (TD-CI), where the TD external field is taken into account directly in the Hamiltonian without any approximations. This TD-CI approach also has an advantage in that it takes into account the electron correlation by narrowing down the number of employed Slater determinants. We apply our TD-CI approach to the case of two electrons confined in the square quantum dot (QD) having the spin singlet multiplicity, and study theoretically the spatial and temporal fluctuation of the two-electron ground state under photon injection and pulse field application.

    Original languageEnglish
    Article number022801
    JournalJapanese Journal of Applied Physics
    Volume52
    Issue number2
    DOIs
    Publication statusPublished - 2013 Feb

    Fingerprint

    configuration interaction
    Semiconductor quantum dots
    quantum dots
    Schrodinger equation
    Hamiltonians
    Electron correlations
    Electrons
    Ground state
    Dynamical systems
    Photons
    electrons
    determinants
    dynamical systems
    injection
    ground state
    photons
    pulses
    approximation

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

    Cite this

    Time-dependent configuration interaction approach for multielectron system confined in two-dimensional quantum dot. / Okunishi, Takuma; Clark, Richard; Takeda, Kyozaburo; Kusakabe, Koichi; Tomita, Norikazu.

    In: Japanese Journal of Applied Physics, Vol. 52, No. 2, 022801, 02.2013.

    Research output: Contribution to journalArticle

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