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giants86
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Homework Statement
A particle is in the state
1/2 |1> - 1/2 |2> + 1/2 |3> - 1/2 |4>
A detector is placed to measure state |4>. What the particle's wave function collapses into, if the detector does not find a particle
Homework Equations
<i|j> = delta (i, j)
The Attempt at a Solution
1/sqrt(3) ( |1> - |2> + |3>) - normalized perpendicular component