Answered: 15 2 0 To the given unperturbed… | bartleby

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15 2 0
To the given unperturbed Hamiltonian
2 5 0
0 0 2
[1
1
we add a small perturbation given by
1
1 where & is small quantity.
-1
1
The ground state eigenvector of the unperturbed Hamiltonian is

A pair of eigenvalues of the perturbed Hamiltoniar , using first order perturbation theory,

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