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vault backup: 2026-07-29 10:08:19

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Benjamin Neumann
2026-07-29 10:08:19 +02:00
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SS2026/Quantum Computing/4. Observing and measuring/Observing probabilistic and measuring quantum systems.md
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@@ -21,3 +21,21 @@ Measuring a quantum state CHANGES THE SYSTEM!!!
![[Pasted image 20260729094710.png]]
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## Elitzur-Vaidman bomb tester
Given a box we want to determine whether it contains a bomb.
To test, a photon can be send through the box.
- if the bomb detects a photon it explodes!
- if no bomb is present nothing happens
![[Pasted image 20260729100407.png]]
#### Beam Splitter
![[Pasted image 20260729100435.png]]
A beam splitter is a semi transparent mirror.
Photons entering from up can come out on the up or down path - analog for down
Quantum mechanically it could come in a superposition between up and down