diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 9e3775c..52e2b04 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,12 +13,12 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "SS2026/Quantum Computing/17. Quantum Error Correction/Quantum Error Correction.md",
+                "file": "SS2026/Quantum Computing/18. Fault-torerant computation/Fault-Tolerant Computation.md",
                 "mode": "source",
                 "source": false
               },
               "icon": "lucide-file",
-              "title": "Quantum Error Correction"
+              "title": "Fault-Tolerant Computation"
             }
           }
         ]
@@ -218,22 +218,23 @@
   },
   "active": "25f5b25d5eca7203",
   "lastOpenFiles": [
+    "SS2026/Quantum Computing/Introduction to Quantum Computing.md",
+    "SS2026/Quantum Computing/18. Fault-torerant computation/Fault-Tolerant Computation.md",
+    "SS2026/Quantum Computing/17. Quantum Error Correction/Quantum Error Correction.md",
+    "SS2026/Quantum Computing/18. Fault-torerant computation",
+    "SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113212.png",
+    "SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113154.png",
+    "SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113147.png",
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-    "SS2026/Quantum Computing/17. Quantum Error Correction/Quantum Error Correction.md",
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     "SS2026/Quantum Computing/16. Universal set of gates/Anhänge/Pasted image 20260806100838.png",
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-    "SS2026/Quantum Computing/16. Universal set of gates/Anhänge/Pasted image 20260806100803.png",
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     "SS2026/Quantum Computing/15. Ion-based/Ion-based Quantum Computers.md",
     "SS2026/Quantum Computing/16. Universal set of gates",
@@ -244,7 +245,6 @@
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     "SS2026/Quantum Computing/Anhänge/Introduction-to-Quantum-Computing.pdf",
     "SS2026/Quantum Computing/14. Quantum Computer",
-    "SS2026/Quantum Computing/13. Quantum Physics/Anhänge",
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diff --git a/SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113147.png b/SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113147.png
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index 0000000..1a9d5fc
Binary files /dev/null and b/SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113147.png differ
diff --git a/SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113154.png b/SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113154.png
new file mode 100644
index 0000000..a79f899
Binary files /dev/null and b/SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113154.png differ
diff --git a/SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113212.png b/SS2026/Quantum Computing/17. Quantum Error Correction/Anhänge/Pasted image 20260806113212.png
new file mode 100644
index 0000000..7bd9d04
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diff --git a/SS2026/Quantum Computing/17. Quantum Error Correction/Quantum Error Correction.md b/SS2026/Quantum Computing/17. Quantum Error Correction/Quantum Error Correction.md
index 7c08819..1f551a4 100644
--- a/SS2026/Quantum Computing/17. Quantum Error Correction/Quantum Error Correction.md	
+++ b/SS2026/Quantum Computing/17. Quantum Error Correction/Quantum Error Correction.md	
@@ -31,3 +31,13 @@ Correcting Z-errors is possible with this:
 
 ## Shor's code
 
+The error correcting code for XZ-errors is called Shor-code.
+
+![[Pasted image 20260806113147.png]]
+
+![[Pasted image 20260806113154.png]]
+
+
+## Steane Code
+
+![[Pasted image 20260806113212.png]]
\ No newline at end of file
diff --git a/SS2026/Quantum Computing/18. Fault-torerant computation/Fault-Tolerant Computation.md b/SS2026/Quantum Computing/18. Fault-torerant computation/Fault-Tolerant Computation.md
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/SS2026/Quantum Computing/18. Fault-torerant computation/Fault-Tolerant Computation.md	
@@ -0,0 +1 @@
+
diff --git a/SS2026/Quantum Computing/Introduction to Quantum Computing.md b/SS2026/Quantum Computing/Introduction to Quantum Computing.md
index 0baaf92..1362adc 100644
--- a/SS2026/Quantum Computing/Introduction to Quantum Computing.md	
+++ b/SS2026/Quantum Computing/Introduction to Quantum Computing.md	
@@ -15,3 +15,4 @@
 ## 15. [[Ion-based Quantum Computers]]
 ## 16. [[Universal Set of Gates]]
 ## 17. [[Quantum Error Correction]]
+## 18. [[Fault-Tolerant Computation]]