MAGNETOOPTICAL SPECTRA OF STRONGLY CORRELATED ELECTRONS IN NONPARABOLIC QUANTUM DOTS

By directly diagonalizing the many-body interacting Hamiltonian for tw o-model confinement potentials, we calculate the dipole-allowed optica l-transition Spectra for a few electrons confined in a small quantum d ot subjected to a strong external magnetic field. We find substantial and qualitative many-body corrections to the optical-transition energi es for quartic and flat-bottomed parabolic confinement in contrast to the well-studied purely parabolic confinement where optical transition s are known to be unaffected by interaction effects by virtue of the g eneralized Kohn's theorem. We predict strong non-monotonic structures as a function of the magnetic field in the magneto-optical excitation energy spectrum.