Sci.Physics.Foundations

Joy Christian wrote: ↑Thu Aug 04, 2022 7:52 am .
Quantum Computers are dead all over again: https://www.science.org/content/article ... -after-all
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kev01 wrote: ↑Fri Aug 05, 2022 1:14 am

Joy Christian wrote: ↑Thu Aug 04, 2022 7:52 am .
Quantum Computers are dead all over again: https://www.science.org/content/article ... -after-all
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Last paragraph in quoted article:
"Still, the Google demonstration was not just hype, researchers say. Sycamore required far fewer operations and less power than a supercomputer, Zhang notes. And if Sycamore had slightly higher fidelity, he says, his team’s simulation couldn’t have kept up. As Hangleiter puts it, “The Google experiment did what it was meant to do, start this race.”"

Joy, if your original boast that QC would never achieve anything beyond conventional computing capabilities were true, Zhang's commentary there should read a lot differently. You picked up elsewhere, much later than my own posting on it, the touted Kish et. al. advantage of NBL (noise based logic) over QC e.g.
https://arxiv.org/abs/1905.03162

The latest article on that points out a roadblock where some fundamental issues still need to be solved.
But all of that aside, every time you have posted an article lampooning the 'Quantum supremacy' hype (true enough), none of those article authors, or the authorities they quoted, claimed there was a theoretical flaw in the basic premise that intrinsically quantum principles of superposition and entanglement were at play.

What say you Joy?

Joy Christian wrote: ↑Thu Sep 12, 2024 7:46 am .
The lure of "quantum computers" is one of the most lucrative scams, with scammers well placed in both academia and the industry of quantum technology. These scammers are earning millions in prizes and salaries. But here is a rare talk by Mikhail Dyakonov that debunks all the hype about quantum computers:

https://www.facebook.com/share/p/jpRZtM6TgTQXHy76/

FrediFizzx wrote: ↑Fri Sep 13, 2024 9:26 am

Joy Christian wrote: ↑Thu Sep 12, 2024 7:46 am .
The lure of "quantum computers" is one of the most lucrative scams, with scammers well placed in both academia and the industry of quantum technology. These scammers are earning millions in prizes and salaries. But here is a rare talk by Mikhail Dyakonov that debunks all the hype about quantum computers:

https://www.facebook.com/share/p/jpRZtM6TgTQXHy76/

So, qubits are not real?

FrediFizzx wrote: ↑Sat Sep 14, 2024 4:47 pm Is there any proof that superposition doesn't exist? That seems to be the difference.

FrediFizzx wrote: ↑Mon Sep 16, 2024 6:40 pm The existence of quantum superposition is supported by several key experiments and theoretical principles in quantum mechanics. Here are a few notable examples:

1. **Double-Slit Experiment**: This classic experiment demonstrates the wave-particle duality of particles like electrons and photons. When particles pass through two slits, they create an interference pattern on a screen, which can only be explained if each particle is in a superposition of passing through both slits simultaneously¹.

2. **Stern-Gerlach Experiment**: This experiment shows that particles such as electrons can exist in a superposition of spin states. When a beam of particles passes through a non-uniform magnetic field, it splits into two distinct paths, corresponding to the spin-up and spin-down states. This splitting indicates that the particles were in a superposition of spin states before measurement¹.

3. **Bell's Theorem and Bell Test Experiments**: These experiments test the predictions of quantum mechanics against those of classical physics. The results consistently support the quantum mechanical prediction of entanglement and superposition, ruling out local hidden variable theories¹.

4. **Quantum Interference**: Experiments involving quantum interference, such as those with photons in interferometers, show that particles can interfere with themselves, a phenomenon that can only be explained by superposition¹.

These experiments, along with the mathematical framework of quantum mechanics, provide strong evidence for the existence of superposition. The principles of quantum mechanics, such as the Schrödinger equation, inherently include superposition as a fundamental aspect¹.

From Copilot. Number 3 is no good; you ruled that out. 1 and 4 seem the same and I don't think 2 proves anything. So, number 1 needs to be disproven. But how?
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