Chapter 12, Problem 12.33E

Interpretation Introduction

Interpretation:

The reason as to why the integral representing the first-order correction can be solved analytically and be exact is to be stated.

Concept introduction:

Perturbation theory assumes that a system can be approximated as a known, solvable system. The difference between the known system and system of interest is small and additive. Thus, the Hamiltonian for the real system can be written as given below.

${\widehat{H}}_{\text{system}}={\widehat{H}}_{\text{ideal}}+{\widehat{H}}_{{}_{\text{perturb}}}$