Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-08-25
Physics
Condensed Matter
Strongly Correlated Electrons
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, a
Scientific paper
10.1016/j.physe.2003.12.053
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.
Brosens F.
Devreese J. T.
Fomin V. M.
Klimin Sergei N.
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