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-    "SS2026/Datenbanken und Informationssysteme/MongoDB/MongoDB.md"
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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
index 8b13789..b65b294 100644
--- a/SS2026/Quantum Computing/18. Fault-torerant computation/Fault-Tolerant Computation.md	
+++ b/SS2026/Quantum Computing/18. Fault-torerant computation/Fault-Tolerant Computation.md	
@@ -1 +1,12 @@
 
+We now face two problems with continuous computations:
+1. Applying operations on logical qubits. Applying operations on encoded qubits would only be possible by decoding - applying - encoding again. Not optimal. Also errors can happen in decode encode.
+2. Operations on encoded qubits could introduce new more complex errors.
+
+
+## Operations on logical/physical qubits
+
+We begin by defining how to apply operations to encoded qubits:
+
+![[Pasted image 20260806135601.png]]
+![[Pasted image 20260806135610.png]]