Vol 3 - Landau, Lifshitz - Quantum mechanics - non-relativistic theory (3ed., 1991) · Problem 45.1

The Quasi-Classical Case

Physics — Landau & Lifshitz · one-dimensional-shallow-well-energy-level

Problem

Determine the energy level in a one-dimensional potential well whose depth is small. It is assumed that the condition (45.4) is satisfied.