I found a funny model of the qubit written by Aerts in(adsbygoogle = window.adsbygoogle || []).push({});

Foundations of quantum physics: a general

realistic and operational realistic and operational approach.

At the beginning the qubit is at the point P on the Bloch sphere. It will be measured along another direction (two opposite points on the sphere). There is an elastic between these points. A and B. P falls orthogonally on AB at Q and then the elastic breaks somewhere between A and B. So Q is projected to up (A) or down (B) according to the probability formula of QM!

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# B The sticky elactic in the Bloch sphere

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