Files
ObsidianVault/SS2026/Quantum Computing/4. Observing and measuring/Observing probabilistic and measuring quantum systems.md
T

560 B

Observing = learning outcome

!Pasted image 20260729093733.png

Because after observing all possibilities collapse to one.

Example:

!Pasted image 20260729093827.png !Pasted image 20260729093834.png

The point here is that the result doesn't change if we observe at any point in the process!

Measuring a quantum system

Given a quantum state \psi \in \mathbb{C}^n we will !Pasted image 20260729094624.png

BUT!!! Measuring a quantum state CHANGES THE SYSTEM!!!

!Pasted image 20260729094710.png !Pasted image 20260729094718.png