Einstein's missed opportunity to rid us of 'spooky actions at a distance'

Re:Einstein's missed opportunity to rid us of 'spooky action... by brianush1 on Tuesday October 13, 2020 @12:24PM (#24767047)

Obligatory "not a quantum physicist," but the only way to observe something is to throw something at it (e.g. a photon) and see what bounces back. The problem is that when you throw something at it, you're interacting with and affecting the ball.

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Re:Einstein's missed opportunity to rid us of 'spooky action... by monktastic1 on Tuesday October 13, 2020 @12:53PM (#24767372)

This is not quite correct. There are ways to gain information about a quantum state without interacting with it: https://en.m.wikipedia.org/wiki/Interaction-free_measurement

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Re:Einstein's missed opportunity to rid us of 'spooky action... by mrkstu on Tuesday October 13, 2020 @01:06PM (#24767496)

Do (non)measurements taken this way 'collapse the wave function' anyway? Or can you only get information that is still open to change during the actual measurement?

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Re:Einstein's missed opportunity to rid us of 'spooky action... by monktastic1 on Wednesday October 14, 2020 @12:21AM (#24773064)

"Collapse" is just one way to explain how measurements happen. These are "actual" measurements, because they give you actual information.

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Re:Einstein's missed opportunity to rid us of 'spooky action... by Koshkin on Tuesday October 13, 2020 @10:32PM (#24772551)

Yeah, this is another popular non-explanation. (It does not explain why the ensuing randomness is subject to strict and perfectly deterministic laws).

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