diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index a9d5af5..f75a88b 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -218,6 +218,10 @@
   },
   "active": "25f5b25d5eca7203",
   "lastOpenFiles": [
+    "SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145615.png",
+    "SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145536.png",
+    "SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145524.png",
+    "SS2026/Quantum Computing/13. Quantum Physics/Anhänge",
     "SS2026/Quantum Computing/12. Grover's Algorithm/Grover's Algorithm.md",
     "SS2026/Quantum Computing/Anhänge/Introduction-to-Quantum-Computing.pdf",
     "SS2026/Quantum Computing/13. Quantum Physics/Quantum Physics.md",
@@ -231,8 +235,6 @@
     "SS2026/Quantum Computing/12. Grover's Algorithm/Anhänge/Pasted image 20260805103706.png",
     "SS2026/Quantum Computing/12. Grover's Algorithm/Anhänge/Pasted image 20260805103650.png",
     "SS2026/Quantum Computing/12. Grover's Algorithm/Anhänge/Pasted image 20260805102717.png",
-    "SS2026/Quantum Computing/12. Grover's Algorithm/Anhänge/Pasted image 20260805102659.png",
-    "SS2026/Quantum Computing/12. Grover's Algorithm/Anhänge/Pasted image 20260805102605.png",
     "SS2026/Quantum Computing/12. Grover's Algorithm/Anhänge",
     "SS2026/Quantum Computing/12. Grover's Algorithm",
     "SS2026/Klausurplan.canvas",
@@ -245,7 +247,6 @@
     "SS2026/Quantum Computing/9. Bernstein-Vazirani/Bernstein-Vazirani Algorithm.md",
     "SS2026/Quantum Computing/9. Bernstein-Vazirani/Anhänge",
     "SS2026/Quantum Computing/8. Ket Notation/Ket Notation.md",
-    "SS2026/Quantum Computing/9. Bernstein-Vazirani",
     "SS2026/Quantum Computing/7. Quantum Circuits/Quantum Circuits.md",
     "SS2026/Quantum Computing/4. Observing and measuring/Observing probabilistic and measuring quantum systems.md",
     "SS2026/Quantum Computing/5. Partial observing and measuring/Partial observing and measuring systems.md",
diff --git a/SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145524.png b/SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145524.png
new file mode 100644
index 0000000..877bd0b
Binary files /dev/null and b/SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145524.png differ
diff --git a/SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145536.png b/SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145536.png
new file mode 100644
index 0000000..dbb8545
Binary files /dev/null and b/SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145536.png differ
diff --git a/SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145615.png b/SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145615.png
new file mode 100644
index 0000000..3747f7a
Binary files /dev/null and b/SS2026/Quantum Computing/13. Quantum Physics/Anhänge/Pasted image 20260805145615.png differ
diff --git a/SS2026/Quantum Computing/13. Quantum Physics/Quantum Physics.md b/SS2026/Quantum Computing/13. Quantum Physics/Quantum Physics.md
index e69de29..e0692fb 100644
--- a/SS2026/Quantum Computing/13. Quantum Physics/Quantum Physics.md	
+++ b/SS2026/Quantum Computing/13. Quantum Physics/Quantum Physics.md	
@@ -0,0 +1,18 @@
+We describe the state of electrons inside specific orbitals:
+
+We assign each orbital a number from 0,1,2...
+In each orbital each electron has a specific energy level $E_0,E_1,E_2,...$ 
+Electrons in a particular orbital x are in the corresponding quantum state $\ket{x}$
+
+![[Pasted image 20260805145524.png]]
+![[Pasted image 20260805145536.png]]
+
+### Time evolution of a quantum state
+
+![[Pasted image 20260805145615.png]]
+
+
+### Energy / Hamiltonian
+
+From now on we assume there are only finitely many orbitals N. (not really true)
+