Discuss the below:
Dirac Notation for a Quantum State of a System
Q: In the dirac notation for a quantum state of a system, an eigenstate wave function u_n is replaced by the vector |n>, and a general state wave function ψ by |ψ>
a) Translate the following mathematical statements to the corresponding forms n wave mechanics: =δm ()* where A is an hermitian operator.
b) By considering the expansion of |ψ> in terms of |n>, derive the following result which expresses the completeness property of the set of eigenstates.
Σ|n>