Why does the magnitude of a ket vector not matter?(adsbygoogle = window.adsbygoogle || []).push({});

The motivation appears to be that a state vector only can decribe a particle, or no particle.

But why shouldn't the magnitude of ket vectors not be used to represent the density of the particles, the average number of particles?

I'm am fairly new on the mathematics, in fact just starting again. ;)

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# Why do ket vectors not have magnitudes?

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