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Continuum transition probability at long times
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Time-dependent perturbation theory
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For a harmonic perturbation and continuum detuning
Ω
(
k
)
, first-order amplitudes contain
Ω
(
k
)
/2
s
i
n
(
Ω
(
k
)
t
/2
)
.
(58)
The distributional limit
(
Ω/2
)
2
s
i
n
2
(
Ω
t
/2
)
⟶
2
π
t
δ
(
Ω
)
(59)
selects energy-conserving continuum states and produces a transition probability linear in time.
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(5)
Time-dependent perturbation theory
Quantum mechanics
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Physics
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