Quantum Supremacy Explained

Quantum supremacy’s that moment when a quantum computer beats the best supercomputers at solving some kind of problem, and it’s a very exciting time right now in quantum computing because, as of recording this video we’re on the brink of having quantum supremacy. In this video I quickly describe how quantum computing works, what quantum computers exist in the world today and what you need to do to prove quantum supremacy.

When I posted this video quantum supremacy hadn’t been reached, but people are predicting that it will happen soon.
Also the qubit numbers I posted for the different quantum computing efforts will go out of date quite quickly, so they won’t be valid if you are watching this in the future. Hello from April 2018!
And full disclosure - I used to work at D-Wave but I don’t have any favourites, I’m excited by progress on all fronts and believe they all deserve the same critical analysis.

#quantum #computers #DomainOfScience

Also, if you enjoyed this video, you will probably like my science books, available in all good books shops around the work and is printed in over 20 languages. Links are below or just search for Professor Astro Cat. They are fun children's books aimed at the age range 4+ and 7+. But they are also a hit with adults who want good explanations of science. The books have won awards and the app won a Webby.

Find me on twitter, instagram, and my website:

[domainofscience]

Wohoo! Google just announced their quantum supremacy result. Turned out I made this video a year and a half too early. Oops!

[abdullahrafi]

who is watching this video after Google announced ?

[stkyriakoulisdr]

Probably one of the very few people on youtube who not only understand how a quantum computer works but also have the capability of explaining. Dear sir, I do not know how, but you are really good at what you do. We need more people like you.

[sebastianlopez]

I don't remember subscribing to this channel... But I like it, good choice past self... Nicely done...

[stephennielsen]

Microsoft’s programming language for quantum computers is called “Q#” if anyone is interested

[naarad_muni]

Man, the future of gaming is gonna be REAL trippy

[jacquesfrancois]

Map of geography. (For a late April fools)

[evrcroft]

Please do the Map of Engineering/Technology.
I mean, from the Stone Age to steam engine to genome editing.

I appreciate you considering our collective request.

[watcher]

I searched "quantum physics" and watched a TedX where you spoke about quantum physics for 7 year olds. While I was listening I had opened a separate page and scrolled down on a search of "quantum supremacy" and for some reason clicked this vid and it's you. I scrolled past a dozen or so vids and randomly picked this one with no idea this was your channel.

[alexsawyer]

There's one thing I don't understand about quantum computers. They work off of probabilities. It's all based off of probabilities of certain states when you measure a superposition. You build up distributions. If that's true then how do you get a definitive answer. Like what if you're just really unlucky. Is it possible to get a wrong answer, because it's just probabilities?

[delongtsway]

The way I see it is that quantum computers can help you when you’re not sure exactly what you’re looking for and you want a clear path. But they're not fundamentally better than classical computers if you already know what you’re looking for.

[toddspickelmier]

So google just figured this out today? Great video but I’m an idiot and still have no idea what’s going on haha

[korakys]

The difference between building a classical computer or a quantum computer sounds comparable to the difference between building a fission or a fusion nuclear power plant.

[OleTange]

Ahh, so quantum supremacy simply means that QC can outperform CC for one single problem - not all problems.

[pandakso]

With a quantum computer, would hackers be able to try all possible passwords at once? 🤔

[KL_Stereo]

Do a map of Astrology, the Science of all Sciences

[symbolxchannel]

Ok, but how do you define (or program) a problem on a quantum computer? How does it compare to a classical computer? How would a programmer exploit a quantum computer for data processing?

[anteconfig]

I've watched many video that sorta explained quantum computers and they mention superposition and entanglement but I couldn't make sense of how they come together to have this powerful computation effect. You actually made it make sense to me. I'm subscribing.

[tonyblake]

Hello there. Ion trap quantum computers are classified as universal quantum computers. You can implement the set of universal gates {C-Phase, C-Not, T, H} on the ion trap system and make up circuits that are equivalent to circuits set up on a superconducting system.

[ha]

Good honest assessment of the current quantum computing environment.