From bb79f9b1beee85f2290f3bed9b62eacaca445602 Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Wed, 22 Sep 2021 15:33:15 +0200
Subject: Expand knowledge base

---
 content/know/concept/time-dependent-perturbation-theory/index.pdc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'content/know/concept/time-dependent-perturbation-theory/index.pdc')

diff --git a/content/know/concept/time-dependent-perturbation-theory/index.pdc b/content/know/concept/time-dependent-perturbation-theory/index.pdc
index b16e3ee..1fbd9ce 100644
--- a/content/know/concept/time-dependent-perturbation-theory/index.pdc
+++ b/content/know/concept/time-dependent-perturbation-theory/index.pdc
@@ -181,7 +181,10 @@ which can cause confusion when comparing literature.
 
 In any case, the probability oscillates as a function of $t$
 with period $T = 2 \pi / (\omega_{ma} \!-\! \omega)$,
-so after one period the particle is certain to be back in $\ket{a}$.
+so after one period the particle is back in $\ket{a}$,
+and after $T/2$ the particle is in $\ket{b}$.
+See [Rabi oscillation](/know/concept/rabi-oscillation/)
+for a more accurate treatment of this "flopping" behaviour.
 
 However, when regarded as a function of $\omega$,
 the probability takes the form of
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