~

codes/quantum/qubits/stabilizer/qldpc/homological/homological_product.yml

@@ -17,10 +17,10 @@ description: |
   CSS code formulated using the homological product of two chain complexes (see \ref{topic:CSS-to-homology-correspondence}).
   Given a classical code with parity-check matrix \(H\), the homological product yields two classical codes \(C_{X,Z}\) with parity-check matrices
   \begin{align}
-    H_X=\begin{pmatrix}I\ot H\\
-    H\ot I
-    \end{pmatrix}\quad\quad\text{and}\quad\quad H_Z=\begin{pmatrix}H\ot I\\
-    I\ot H
+    H_X=\begin{pmatrix}I\otimes H\\
+    H\otimes I
+    \end{pmatrix}\quad\quad\text{and}\quad\quad H_Z=\begin{pmatrix}H\otimes I\\
+    I\otimes H
     \end{pmatrix}~.
   \end{align}