What happens to normalization of wavefunction when you add a perturb correction?

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SUMMARY

The discussion centers on the normalization of wavefunctions when introducing perturbative corrections in quantum mechanics. Specifically, it addresses the expression |n> = |n0> + |n1>, where |n0> is the unperturbed ket and |n1> is the first-order correction. It concludes that the combined ket |n> remains normalized to unity, as indicated by the equation = 1. Thus, no new normalization is required upon adding the perturbative correction.

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Homework Statement



Consider any ket. Find the perturbative correction to that ket. Then,

|n> = |n0> + |n1>

Here, |n0> is the ket from the unperturbed hamiltonian (who cares what it is), and |n1> is the 1st order correction.

Do you introduce a new normalization when you add the perturbative correction? It seems the sensible thing to do.

Homework Equations





The Attempt at a Solution

 
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Yes, the 'sum' ket is also normalized to unity. <n|n>=1.
 

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