On the time-dependent solutions of the Schrodinger equation

Recently, there has been some interest in finding exact solutions to the time-dependent Schrodinger equation, specifically in the case of a time-dependent linear potential, though surprisingly in all those works very cumbersome methods are used. In the present report we want to emphasize that there exists another method, quite general and simple, to solve such kind of problems. The method was proposed several years ago and it is based on the so called Wei-Norman theorem.