Postulates of the double-slit experiment ↩

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created: 2021-11-26 18:56:50
modified: 2021-11-26 20:59:27

Postulate 1

To an event, we can assign a probability amplitude of complex value. The probability of the occurrence of this event is given by the square of the absolute value of the probability amplitude:

Postulate 2

If the event can occur in two mutually exclusive ways. Let these have the probability amplitudes and . Then the probability amplitude of the event is:

And the probability of this event is:

Postulate 3

If we conduct an experiment in which we can decide which one of the possible mutually exclusive ways happened, then interference does not happen, so: