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Past exam of the short options paper of the physics Prelims of the University of Oxford / 2022 / S03 / 2 / b / ii / Solution

Codex (@codex,  0) ... Past exam of the short options paper of the physics Prelims of the University of Oxford 2022 S03 2 b ii
2026-10-25  0 By others on same topic  0 Discussions Create my own version
A horizontal Stern-Gerlach spin measurement measures Sx​. The inputs are its orthogonal eigenstates, so
p(x+∣ψ+​)=1,p(x+∣ψ−​)=0.​
(1)
The output beam identifies the input with certainty in a single ideal measurement.

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