Decoded: How Does a Quantum Computer Work?

If someone asked you to picture a quantum computer, what would you see in your mind?

[marksamson]

This explanation, like every one I have read or watched, really doesn't explain how QCs will work. It talks about qbits, entanglement, and such, but how do these things contribute to a computed answer? This is like explaining a classical computer by saying it consists of binary digits and then stopping the explanation right there. I don't care how may qbits some experimental computer has. Tell me HOW it uses those qbits to do useful computation. Are there quantum logic gates for instance? Haven't heard any QC explanation tackle that question.

[parveezalam]

This is severely underrated channel I've ever seen with the greatest
That could be solvable with some great creative thumbnails I think....

[mrYazeed]

I watched the video twice. Once for the understanding and the second for the beautiful animations

[suzannepetrella]

A great introduction. Certainly don't expect an entire explanation in eight minutes.

[peterpruyne]

I must disagree with other commenters. This video does not “decode” a darn thing. For instance, how does one arrange the connected qubits for different algorithms? How are initial conditions determined and set? Hows does the algorithm recognize being done? Or how about a real problem that DOESN’T use Shor’s algorithm, like finding roots for a complex polynomial? Or address the mundane, like what does the “code” look like?

I would call this video Fluff With Facts.

[twentylush]

ok i guess my question is not "how does a quantum computer work" but rather "how does a quantum computer collapse the system to the solution"

[CesarClouds]

I hope I live long enough to see a quatum mobile phone with tactile volumetric display.

[rafaelvillalobos]

I don't understand how a quantum computer works...
But I do hear many people who supposedly do understand quantum mechanics complain about how quantum computers "do not try all answers at the same time" and "that is not how quantum computers work".

[havefunbesafe]

I understand it and at the same time I don't; however, there is a greater probability I will; providing I re-watch it, and rethink my position on how Quantum Computers work.

[Mister]

On, not on, Off, not off. It's computing with dimmer switches!

[lazarusblackwell]

Yeah i didnt understand a word that was said in this "tutorial".

Im sure there is a way to explain this in a far simpler way.

[chazgillespie]

😊 very good transmission! With cool animation
White noise in a tin can .

[mishra.pritam]

Good interference through electromagnetic pulses may increase the probability of desired answer as superposition can generate many things . Decoherence is main issue here that is making qubits dance in a desired way😂 through our own music😂.

[tearsien]

I think I'm with Einstein on this one. I'm just not seeing the use of outputting a completely non-deterministic state and applying a constructed state to resolve for an unknown state? It seems like you need to know how to influence the non-deterministic state to get a possible answer, which I feel like in many ways would be the answer itself (maybe its easier?). unless it's useful in some other way I'm not seeing (probably).

[celeste]

its scary to imagine these computers will be common in 500 years or so SHEESH

[steve]

I figured error noise occurs because the suns radiation, maybe if you encased the computer in a cold and thick lead case the quibits would stay active to perform properly

[sambrown]

With the best will in the world I still took nothing away from this video. Like many QC "explanation" videos there is no explanation of working. Only hype about what it could enable. If you strip away the waffle you get "Quantum computers work by using qbits in a clever way" .. and?

[harshitakulsaini]

There's nothing like physics magic tbh

[LawatheMEid]

Really i did not understand how to control q-bits!

[olagarto]

why cant i find an actual explanation of how a Qantum computer calculates things?
like a normal computer is a complex sequence of diodes, makes sence.
like Wat a basic adder wold look like in a quantum computer?