The Measurement Problem Explained: From Quantum Mystery to Stability

In the standard quantum mechanics taught in most courses and textbooks, it is not the act of “measuring” itself that physically causes the collapse.

The Schrödinger equation (State 1) always evolves unitarily: superpositions remain superpositions forever. No definite single outcome ever emerges by itself.

To get definite outcomes anyway, we add two extra rules by hand:

1. The Born rule — the probabilities are given by |ψ|².

2. The collapse — after a “measurement”, the wavefunction suddenly jumps to one of the possible outcomes.

These two rules are treated as fundamental axioms. They are not derived from the underlying dynamics; they are simply inserted as extra postulates.

That is exactly why we have to explain the middle state (State 2) separately.

We do not describe the transition as a natural physical process. Instead, we insert an unexplained rule the moment we decide that something has been “measured”.

This puts a real limit on our understanding.

We are not truly explaining the transition — we are simply saying “then something magical called the Born rule plus collapse happens”.

Therefore, the real question is not “what causes collapse during a measurement?”

The real question is:

How can we mathematically and dynamically describe the transition from the continuous, unitarily evolving quantum superposition (State 1) to the definite, measurable classical reality (State 3) — without treating the Born rule and collapse as unexplained fundamental postulates ?
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Видео The Measurement Problem Explained: From Quantum Mystery to Stability канала PlateauDynamics