Find the eigenvalues of the following matrix: 0 € 0 € 1 € H = 0 € 0 (3) where e > 0 is a positive, real constant. Matrices of this form show up a lot when doing perturbation theory in quantum mechanics. Then expand each eigenvalue in a Taylor series to second order in e, assuming e « 1. This means that it can have a term independent of e, and/or a term linear in e, and/or a term quadratic in e, but you're leaving out terms of order e, e“, etc. Note that I asked you for the eigenvalues but I did not ask for the eigenvectors.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Find the eigenvalues of the following matrix:
0 € 0
€ 1 €
H =
(3)
0 € 0
where e > 0 is a positive, real constant. Matrices of this form show up a lot when doing perturbation
theory in quantum mechanics.
Then expand each eigenvalue in a Taylor series to second order in e, assuming e « 1. This
means that it can have a term independent of e, and/or a term linear in e, and/or a term quadratic
in e, but you're leaving out terms of order e', e“, etc.
Note that I asked you for the eigenvalues but I did not ask for the eigenvectors.
Transcribed Image Text:Find the eigenvalues of the following matrix: 0 € 0 € 1 € H = (3) 0 € 0 where e > 0 is a positive, real constant. Matrices of this form show up a lot when doing perturbation theory in quantum mechanics. Then expand each eigenvalue in a Taylor series to second order in e, assuming e « 1. This means that it can have a term independent of e, and/or a term linear in e, and/or a term quadratic in e, but you're leaving out terms of order e', e“, etc. Note that I asked you for the eigenvalues but I did not ask for the eigenvectors.
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