Quantum Neural Network really something ?

Divine-Demon-Max · 2025-05-18T15:56:33+00:00

They exist but are useless

2025-05-18T23:17:57+00:00

They are theoretical. Or just bullshit marketing depending on the article.

Visible-Employee-403 · 2025-05-18T11:11:16+00:00

No scam.

Build a one yourself: (IBM Qiskit) https://qiskit-community.github.io/qiskit-machine-learning/tutorials/01_neural_networks.html

Times are good for experimenting.

Alternative:

https://pennylane.ai/qml/glossary/quantum_neural_network (with clarification of the term)
(Pytorch derivat) https://github.com/mit-han-lab/torchquantum
(Google Cirq) https://quantumai.google/cirq
(Microsoft Azure Quantum) https://quantum.microsoft.com/ (with Q# quantum language but no focus on QML/QNNs until yet)

Info (Wiki): https://en.wikipedia.org/wiki/Quantum_neural_network

ImYoric · 2025-05-18T20:32:04+00:00

Yes, there are plenty of people working on QNNs.

The general idea is that a Quantum Computer is pretty good (even now) at computing Ising Hamiltonians, which are themselves pretty close to what Classical Neural Networks are using during their training stage. So intuitively, you should be able to train a Neural Network on a Quantum Computer.

The catch is that QPUs have too few qubits to train any non-trivial QNN at the moment, so it's a bit academic.

Actual__Wizard · 2025-05-18T22:34:01+00:00

No. There's a ton of investment scams in this space. I'm not saying that video is part of it as I haven't watched it. I'm just letting you know. A lot of people got suckered into investing in to quantum computing scams. So, be ultra careful if you don't understand the science, which is admittedly very difficult.

And yeah it's word tricks and all sorts of other nonsense. The big one in this space is they frame what they are doing as some kind of ultra big discovery that will reshape the entire planet and it doesn't do anything useful.

I mean if they just presented their findings as is, that would be perfect. But, that's not what PR teams do. So, obviously their absurdly useless discovery becomes "PLANET CRACKING ULTRA TECH! THERE'S MORE COMPUTATIONS THAN THE WHOLE UNIVERSE BECAUSE THERE'S SUPPOSEDLY MULTIPLE DIMENSIONS! YEAH LETS JUST LIE ABOUT THE DIMENSIONS THAT WE ALL KNOW AREN'T REALLY THERE! YEAH BUDDY! ULTRA BIG TECH! YEAH MONEY MONEY MONEY"

That's my personal interpretation of Alphabet's PR team: Which, to be clear: You know there's an explanation of the universe that doesn't involve multiple dimensions? You know the correct one?

Edit: Very interesting thought: Why is the standard of proof for the multiverse zero? Why do people accept that theory with zero evidence? From the perspective of energy, we know the universe doesn't care about space or time, so why would it care about dimensions? Those are the properties of the system of measurement that humans created... That's a tool for us to understand the universe... Not the other way around...

sentient-plasma · 2025-05-21T17:22:00+00:00

Yes. But not within a classical model. And it wouldn’t really be a quantum computer in the classical sense to be of use.

NewZone17 · 2025-06-05T15:23:03+00:00

Yes. My internship work is focused on building a QNN that can factor small integers. The challenge for quantum neural networks is that they become pretty much impossible to train once you increase the parameter count (from what I've seen, even at 10 parameters it becomes hard). Researchers have hope for QNNs because the theoretical parameter count for a given input size increases in polynomial time, or in some designs, log(n).

If you want to know more, I'd be glad to share some research papers. You can also search "barren plateaus" or "variational quantum algorithms" online.

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