Characterization of shell filling of interacting polarons in a quantum dot through their optical absorption
arXiv:cond-mat/0308486 · doi:10.1016/j.physe.2003.12.053
Abstract
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.
arXiv comment7 pages, 2 figures, E-mail addresses: [email protected], [email protected], [email protected], [email protected], accepted for Physica E
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