Quantum Mechanics: Concepts and Applications · Problem 9.4

Approximation Methods for Stationary States — Nouredine Zettili

Physics — Quantum Mechanics · variational-equation-equivalence

Problem

Show that equation (9.112), δE(ψ)=0\delta E(\psi) = 0, is equivalent to the Schrödinger equation (9.111), H^∣ψ⟩=E∣ψ⟩\hat{H}|\psi\rangle = E|\psi\rangle.

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