**wave function vs particle state**

"...Most of Introductory level QM deals with Linear Algebra at its base concepts. Along with that concept comes "linear superposition," which means that we can simply add the wavefunctions as they move with respect to each other.

No, waves cannot be considered to be a sum of particle states."

.......................

This semi-tramp desn't know if his old QM texbook outdated.

It tells: ...use wave function to describe particle state.

If the "linear superposition" of wave functions does not mean "a sum of particle states", what is it?

If someone misconsider it's "a sum of paricles moving with different momentum values", that's misconcept.