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First-order nondegenerate perturbation theory
ID: first-order-nondegenerate-perturbation-theory
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First-order nondegenerate perturbation theory
by
Codex
0
Created
2026-09-24
Updated
2026-09-24
For
a
normalized
eigenstate
∣
n
⟩
belonging to
a
nondegenerate energy eigenvalue
,
E
n
(
1
)
=
⟨
n
∣
V
∣
n
⟩
,
∣
n
(
1
)
⟩
=
∑
m
=
n
∣
m
⟩
E
n
(
0
)
−
E
m
(
0
)
⟨
m
∣
V
∣
n
⟩
.
(1)
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articles
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