On 10/26/2019 7:09 PM, Alan Grayson wrote:
Maybe this will work as a definition of "interference". Imagine an electron impinges on a screen in a double slit experiment, and at a particular location on the screen, called "the Event", through either of two slits. Suppose it has a probability amplitude of phi1 through slit1. Now imagine another electron, at a later time, impinging on a screen with probability amplitude of phi2 for the same event, but through slit2. If phi1 and phi2 represent different amplitudes or paths for the same Event, we must imagine the waves "interfering" even though they are not simultaneous, and the probability of that event with two possible paths, is the absolute value squared of the sum of phi1 and phi2. AG
In a Young's slit experiment the particles interfere with themselves. The interference pattern appears even if the electrons are sent one per hour. That's what makes it strange, since it violates the classical "logic" that a thing cannot be two different places at the same time.
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