The features of the low-lying spectra of four-body A<SUP>+</SUP>B<SUP>-</SUP>A<SUP>+</SUP>B<SUP>-</SUP> systems have been deduced based on symmetry. Using the method of ...The features of the low-lying spectra of four-body A<SUP>+</SUP>B<SUP>-</SUP>A<SUP>+</SUP>B<SUP>-</SUP> systems have been deduced based on symmetry. Using the method of few-body physics, we calculate the energy spectra of A<SUP>+</SUP>B<SUP>-</SUP>A<SUP>+</SUP>B<SUP>-</SUP> systems in a harmonic quantum dot. We find that the biexciton in a two-dimensional quantum dot may have other bound excited states and the quantum mechanical symmetry plays a crucial role in determining the energy levels and structures of the low-lying states.展开更多
文摘The features of the low-lying spectra of four-body A<SUP>+</SUP>B<SUP>-</SUP>A<SUP>+</SUP>B<SUP>-</SUP> systems have been deduced based on symmetry. Using the method of few-body physics, we calculate the energy spectra of A<SUP>+</SUP>B<SUP>-</SUP>A<SUP>+</SUP>B<SUP>-</SUP> systems in a harmonic quantum dot. We find that the biexciton in a two-dimensional quantum dot may have other bound excited states and the quantum mechanical symmetry plays a crucial role in determining the energy levels and structures of the low-lying states.