Session 03 - CSS and Tanner Graphs

Status: covered from Heptabase lesson 52d28312-6db0-4092-ac61-dd031a01fe62.

Covered Material

• CSS commutativity as H_XH_Z^T=0.
• Tanner graph construction from a parity-check matrix.
• Variable nodes, check nodes, degrees, and the LDPC condition.

Source Anchors

• quantum-tanner-expander-anchor.md
• ../../../../index.md

Retention Check

Ask the learner to draw the Tanner graph for a small parity-check matrix and identify row weight, column weight, check degree, and variable degree.