Towards the Schrödinger Equation
Many different paths lead to the goal of this chapter, the Schrödinger equation (SEq). We choose a traditional one, in which wave properties and the relationship between energy and momentum are the defining elements. Another approach (quantum hopping) can be found in Appendix J, Vol. 1. Certainly that approach is more unconventional, but on the other hand, it makes the basic physical principles more clearly manifest. Of course, the two approaches both lead to the same result.