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Figure 67. The total eigenenergies of the states |00; 0m>, m = 0, —1, -2,..., -5, for two interacting electrons parabolically confined in the quantum dot of size i0 = 3a*B as a function of the ratio ac/a0. Reprinted with permission from [205], J. L. Marin et al., in "Handbook of Advanced Electronic and Photonic Materials and Devices" (H. S. Nalwa, Ed.). Academic Press, San Diego, 2001. © 2001, Academic Press.

The energy level crossings are shown in Figure 67. We have displayed the eigenenergies of the states joo; om), m = o, -1, -2,..., -5, for two interacting electrons parabolically confined in the quantum dot of size io = 3a*B as a function of the ratio wc/wo. As the magnetic field strength increases the energy of the state m = o increases while the energy of the states with nonvanishing quantum number m decreases, thus leading to a sequence of different ground states, as reported in [185]. In the interacting system, the higher the angular momentum of the relative motion, the lower the interaction energy. This is caused by the structure of the relative wavefunction: The larger the angular

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