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3 key concepts and confusions

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artbyphysicistkittyartbyphysicistkitty 06/28/2020 at 14:262 Comments

You might have heard of the terms on the left which cause much confusion and myths about quantum computing. We should update with the correct descriptions on the right. 

Discussions

Michael Wessel wrote 07/06/2020 at 17:24 point

Although I like and appreciate the "practical hands-on approach" to quantum mechanics you are presenting here, I think the picture sometimes get oversimplified by your "demystification attempts". I might quote Feynman here: "If you think you understand quantum mechanics, you don't understand quantum mechanics." Entanglement IS mysterious, and simply rewording descriptions doesn't take that away. I don't think that "being correlated" is in any way less mysterious than "instantaneous change". Experiments like the delayed-choice quantum eraser experiment just defy our "common sense" of reality on so many levels... reality is not what it seems. Just my 2 cents.


I found this great discussion about the "delayed-choice quantum eraser experiment" - it seems I am left with the choice of having to become an Everettian, or accept retro-causality - both of these violate my sense of reality on many levels:

https://www.preposterousuniverse.com/blog/2019/09/21/the-notorious-delayed-choice-quantum-eraser/

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Noah Wood wrote 07/06/2020 at 16:41 point

it is definitely a much easier way of explaining superposition and entanglement.

I think the biggest issue is people tend to overthink things, we're pretty much beat over the head with the classical model of particles from birth and then that gets turned on its head when you start looking at how things actually work at the lowest level.

I find when I'm having trouble it helps to just picture the subatomic particle as a ball of water, just bouncing around all nonchalant until you stop looking at it and it mischievously decides to spill all over the place, then quickly forms back up into a ball when you go to look at it again... Like it's possessed by some kind of poltergeist lol

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