Expand knowledge base, reorganize Green's functions

1 files changed, 2 insertions, 2 deletions

diff --git a/content/know/concept/second-quantization/index.pdc b/content/know/concept/second-quantization/index.pdc
index b8d9a18..b4d920a 100644
--- a/content/know/concept/second-quantization/index.pdc
+++ b/content/know/concept/second-quantization/index.pdc
@@ -317,10 +317,10 @@ which create or destroy a particle at a given position $\vec{r}$:
 
 $$\begin{aligned}
     \boxed{
-        \hat{\psi}^\dagger(\vec{r})
+        \hat{\Psi}^\dagger(\vec{r})
         = \sum_{\alpha} \braket{\alpha}{\vec{r}} \hat{c}_\alpha^\dagger
         \qquad \quad
-        \hat{\psi}(\vec{r})
+        \hat{\Psi}(\vec{r})
         = \sum_{\alpha} \braket{\vec{r}}{\alpha} \hat{c}_\alpha
     }
 \end{aligned}$$