From 6f560e87fa5cd10852e073adbedfc3d46e5da8bb Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Sat, 13 Mar 2021 21:50:05 +0100
Subject: Expand knowledge base

---
 content/know/concept/bloch-sphere/index.pdc | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'content/know/concept/bloch-sphere')

diff --git a/content/know/concept/bloch-sphere/index.pdc b/content/know/concept/bloch-sphere/index.pdc
index 843de1f..f0c48a9 100644
--- a/content/know/concept/bloch-sphere/index.pdc
+++ b/content/know/concept/bloch-sphere/index.pdc
@@ -127,3 +127,12 @@ $$\begin{aligned}
     = \frac{1}{2} \Tr\big( r_z \hat{I} \big)
     = r_z
 \end{aligned}$$
+
+
+## References
+1.  N. Brunner,
+    *Quantum information theory: lecture notes*,
+    2019, unpublished.
+2.  J.B. Brask,
+    *Quantum information: lecture notes*,
+    2021, unpublished.
-- 
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