Update week2.do.txt

Author: mhjensen

doc/src/week2/week2.do.txt

@@ -18,7 +18,7 @@ o introduced the spectral decomposition of operators
 !split
 ===== This week's plans =====
 
-!bblock  We will repeat some of the topics from last week and discuss also 
+!bblock  We will repeat some of the topics from last week and discuss
 o tensor products of Hilbert Spaces and definition of Computational basis, partly repetition from last week
 o Reminder on spectral Decomposition from last week
 o Bloch sphere and representation of qubits
@@ -32,15 +32,12 @@ o "Video of lecture to be added":"https://youtu.be/"
 #* _Reading recommendation_: Scherer, Mathematics of Quantum Computations, chapter 3.1-3.3 and Hundt, Quantum Computing for Programmers, chapter  2.1-2.5. Hundt's text is relevant for the programming part where we build from scratch the ingredients we will need.
 
 
-!split
-===== Links to code examples =====
-
-To be added
 #The code examples presented by Keran are at
 #URL:"https://github.com/CompPhysics/QuantumComputingMachineLearning/blob/gh-pages/doc/pub/week2/ipynb/codeskeran.ipynb"
 
 
 
+
 !split
 ===== Measurements =====
 
@@ -283,6 +280,10 @@ which written out in all its details reads
 !et
 
 
+!split
+===== Bloch sphere =====
+
+
 !split
 ===== Meet the Bloch sphere =====
 !bc pycod
@@ -297,6 +298,13 @@ plot_bloch_vector([1, np.pi/2, np.pi/3], coord_type='spherical')
 !ec
 
 
+!split
+===== Bloch sphere exercise =====
+
+Determine the Bloch sphere angles $\theta$ and $\phi$ for the eigenstates of each Pauli matrix (see lectures from last week for the definition of Pauli matrices).
+
+
+
 !split
 ===== Measurements =====