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From: Niklas Holsti <niklas.holsti@tidorum.invalid>
Newsgroups: comp.arch
Subject: Re: Is Intel exceptionally unsuccessful as an architecture designer?
Date: Fri, 20 Sep 2024 01:08:23 +0300
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On 2024-09-19 23:53, Lawrence D'Oliveiro wrote:
> On Thu, 19 Sep 2024 12:59:42 +0200, Terje Mathisen wrote:
> 
>>  From my recent reading, it seems like factoring 21 (5 bits) requires at
>> least 5+10=15 bits all staying entangled, plus a number of additional
>> bits for error correction.
> 
> The noise factor was something the original ideas about quantum computers
> had not taken into account.
> 
> But it’s pretty obvious why it happens: “quantum” computing was something
> thought up by people who took the “many worlds” interpretation of quantum
> theory just a little too seriously: if you could take advantage of
> “superposition of states” to run your computation simultaneously across
> multiple alternate universes, you could access a whole lot more computing
> power!
> 
> The reason why it doesn’t work is because of conservation of energy.
> Accessing those hypothetical “alternate universes” requires spreading the
> same amount of energy more thinly. And that’s where the noise comes from.
> So ultimately there will be no way to get rid of it.


If you can back up that claim (that noise in quantum computing comes 
from "many worlds") with actual math, you will have proved that 
many-worlds is true. That would be Nobel prize or two, right there. Go 
at it!