Abstract
In this paper, we will discuss the bifurcation graphs of energy states of two and three vertically aligned InAs dots with the same size embedded in a GaAs matrix and the correlations of wave function in ground state energies of two to six QDs for different thicknesses. In the bifurcation graph of energy states of 2 dots, we know that the first bifurcation occured near 1 nm and 2 nm. We use the concept of nodal set to explain the occurrence of the bifurcation. In the wave functions, we find that the dots have some correlations when the separations are less than 3 nm. Also, these peaks are symmetric.