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-rw-r--r--content/know/concept/interaction-picture/index.pdc6
1 files changed, 4 insertions, 2 deletions
diff --git a/content/know/concept/interaction-picture/index.pdc b/content/know/concept/interaction-picture/index.pdc
index 1ce330d..45950ff 100644
--- a/content/know/concept/interaction-picture/index.pdc
+++ b/content/know/concept/interaction-picture/index.pdc
@@ -40,8 +40,10 @@ With $\hat{H}_S(t)$ the full Schrödinger Hamiltonian.
We define the unitary conversion operator:
$$\begin{aligned}
- \hat{U}(t)
- \equiv \exp\!\Big( i \frac{\hat{H}_{0,S} t}{\hbar} \Big)
+ \boxed{
+ \hat{U}(t)
+ \equiv \exp\!\bigg( i \frac{\hat{H}_{0,S} t}{\hbar} \bigg)
+ }
\end{aligned}$$
The interaction-picture states $\ket{\psi_I(t)}$ and operators $\hat{L}_I(t)$