Why Quantum Computers Will Break Reality

Examining the mysteries of quantum computing and its effect on our world

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[finley]

Quantum Computing/ Fusion Reactors/ AI.
This Era is going to be insane.

[StaffyDoo]

“With great powers comes great instability” — I loved it 🐧

[very_tall_dude]

Nice video…
Reminds me of a physics joke:

Schrödinger's cat walks into a bar and doesn't.

[Thinkythinkerton]

“Knowledge will increase, and with it, confusion”

[dancotterman]

The quantum realm is full of entities, as in another dimension. We're actually tapping into a resource we can't control and couple that with autonomous AI and evil has a whole new realm of control. Scary is an understatement.

[Levelz]

The thought of ai running on a quantum computer is crazy

[Skeletondude]

Quantum computers have to be one of the most interesting inventions

[Soooooooooooonicable]

The reason they hang from the ceiling in layers like that is for shock absorption. Much like how it needs to be chilled to near absolute zero, It's all for the sake of stability.

[charlesrockafellor]

Grew up in the '70s, started programming in the '80s... I felt a little future shock with flip-'phones in the late '90s, and iPhones c2008-2010 blindsided me. Somehow the quantum computing and "AI" (not) of the past 5-10 years feel like less of a rollercoaster, after getting used to this real-time third (or maybe fourth?) derivative rate of advancement feels less surreal -- though still terrifyingly precipitous.

[chewy.]

Funny how people use Schrödinger’s cat as an explanation for superposition when he literally made up the scenario as evidence that it doesn’t make sense/isn’t real since a cat can’t be both alive and dead at the same time.

[webx]

Good video. Though a lot of it has been oversimplified, which makes sense.

1. Schrodingers cat isn't about the vial of poison. It is about poisoning the cat if something is in one quantum state vs another. The original used radioactive decay. Since quantum states exist in a superposition, it means both states are present simultanesouly, which implies the cat is both alive and dead. It was created by Schrodinger to bring quantum effects to the macro level, to illustrate how he found superposition to be absurd.

2. With Qubits, it isn't a matter of it being able to contain 2 bits. In that case, MLC NAND or other multi-level data systems have it beat using voltage levels.

The trick is that a Qubit is in a sort of "fuzzy" state, where it can represent any combination of 1 or 0 each at different proportions. When Qubits interact, ALL of the states of one interact with ALL of the states of the other. So in terms of data, adding a 1 bit doubles the number of values each time. Adding 1 qubit SQUARES the number of values each time.

It also has a really cool paralellism effect. Let's say you do an addition. With a binary system, an addition adds 1 known value to another known value, and produces a known value. When adding qubits, it would take every possible state of 1 qubit and adds it to every possible state of the other qubit.

So if you were to do a physics simulation, it wouldn't simulate 1 case at a time. It would simulate every possible state of that physics simulation all at once.

If you subscribe to the "many worlds" interpretation of quantum mechanics, this would basically mean that when you perform a calculation, it is performing that calculation in multiple "universes" simultaneously. I'm a tad skeptical of that, but it does help with visualizing what is going on.

The catch (besides the crazy physics) is that the states aren't deterministic. They are probabilities. So if the answer is 1% Yes and 99% No, it isn't going to simply give you "the answer" but will give you "AN answer", and you have to run it a whole bunch and measure the probability of each answer. The more you poll it, the more precise it gets. But it's impressive because it takes every state into account, which makes it phenomenal for optimization problems.

It won't be replacing consumer electronics any time soon. But it could be useful for AI, because all neurons in a neural network could be calculated simultaneously.

[tedstrauss]

Great video, thanks. I just want to point re your comment at the end that "we are pretty close to figuring it all out" strikes me as similar to this quote, supposedly from a patent administrator of the late 1890s: ""Everything that can be invented has been invented." In my opinion, we will never be close to figuring it all out.

[shashankpatel]

“With great powers comes great instability” Sound better and more relatable than responsibility

[ransummer]

"But thou, O Daniel, shut up the words, and seal the book, even to the time of the end: many shall run to and fro, and knowledge shall be increased."

[joevoidable]

“With great powers comes great instability”
Awesome

[summerbreeze]

But can it run Crysis tho ?
On Ultra settings 4K ?

[adamczene]

One important correction: we do NOT have 3nm chips. They are multilayered with much bigger gaps and they are estimating how close would they be on a single layer.

[nidhogg]

6:50 the only place where my cat was in superposition, was at the door. The cat was outside, and inside at the same time. And i was holding the door open, waiting for the wave function collapse to happen.

[kresimircosic]

That 3nm reference is wrong though, as after 22nm (iirc) the size has become irrelevant and completely false. 3nm is not the size of the gate

[CommackMark]

Left off the crucial detail on Schodingers Cathy thought experiment. It actually was given as an example of a macro manifestation of how peculiar quatum mechanics was. The cat is not simply both dead and alive because it's in a box with poison. Thete was a qyatum event for which we do not know the outcome until we observe. The quatum event was the decay of an atom detected by a device which sealed up would break the bottle of poison. So if you say you don't know the quatum state if the atom then it can be scared up to the macro state of the cat....which too is either dead orcalice simultaneously.