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Characterization of shell filling of interacting polarons in a quantum dot through their optical absorption

Klimin, S. N. ; Fomin, V. M. ; Brosens, F. ; Devreese, J. T.

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  • Título:
    Characterization of shell filling of interacting polarons in a quantum dot through their optical absorption
  • Autor: Klimin, S. N. ; Fomin, V. M. ; Brosens, F. ; Devreese, J. T.
  • Assuntos: Condensed Matter - Strongly Correlated Electrons
  • Descrição: The method for calculating the ground-state energy and the optical conductivity spectra is developed for a system of a finite number of interacting arbitrary-coupling polarons in a spherical quantum dot with a parabolic confinement potential. The path-integral formalism for identical particles is used in order to take into account the fermion statistics. Using a generalization of the Jensen-Feynman variational principle, the ground-state energy of a confined N-polaron system is analyzed as a function of N and of the electron-phonon coupling strength. The calculated optical conductivity spectra of the N-polaron system in a quantum dot manifest features related to ground-state transitions between states with different total spin. Comment: 7 pages, 2 figures, E-mail addresses: devreese@uia.ua.ac.be, fons.brosens@ua.ac.be, fomin@uia.ua.ac.be, klimin@uia.ua.ac.be, accepted for Physica E

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