Application of double exponential Sinc collocation method for the energy levels of the three-dimensional Schrödinger equation

The energy levels of the time-independent Schrödinger equation are computed in three dimensions by applying double exponential Sinc collocation method. Numerical results are provided to demonstrate the high accuracy of the proposed approach for different potential functions. Comparative tests with the single exponential Sinc collocation method are made to confirm the superiority of the double exponential Sinc collocation method.