What happens when a detector does not find a particle in state |4>?

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SUMMARY

The discussion centers on the quantum mechanics scenario where a particle is in the superposition state 1/2 |1> - 1/2 |2> + 1/2 |3> - 1/2 |4> and a detector is used to measure state |4>. When the detector does not find the particle in state |4>, the wave function collapses to 1/sqrt(3) ( |1> - |2> + |3>), representing the normalized perpendicular component of the original state. This outcome illustrates the principles of wave function collapse and measurement in quantum mechanics.

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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
 
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looks good to me, man. nice work :)
 

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