Hartree-Fock dynamics in highly excited quantum dots

Details Hartree-Fock dynamics in highly excited quantum dots Hartree-Fock dynamics in highly excited quantum dots

2001-08-27

arxiv.org/abs/cond-mat/0108428v1

PRB 64, 235324 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 embedded figures

Scientific paper

10.1103/PhysRevB.64.235324

Time-dependent Hartree-Fock theory is used to describe density oscillations of symmetry-unrestricted two-dimensional nanostructures. In the small amplitude limit the results reproduce those obtained within a perturbative approach such as the linearized time-dependent Hartree-Fock one. The nonlinear regime is explored by studying large amplitude oscillations in a non-parabolic potential, which are shown to introduce a strong coupling with internal degrees of freedom. This excitation of internal modes, mainly of monopole and quadrupole character, results in sizeable modifications of the dipole absorption.

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