Classical computer: true, false Quantum computer: maybe

The comments section: 100% : I don't understand 100% : I understand .. And that's quantum computing

Really like how this professor teaches. He's very understandable.

I lost it at the when he started explaining about the coefficient part

Wasn't expecting Loki to do an explanation about quantum computing

it's amazing I don't even understand a single bit.

02:33 - the moment he realized the average viewer won't understand anything. And he was correct.

This video should be titled “Italian Metalhead Explains About Qubits”

Epic accent: Check Epic hair: check Epic soul patch: check This dude's got it down

That's the first time I've 'got' how quantum computers work. -'it's not the speed of the individual operations, it's the number of operations it takes to reach the result.' No magic. Andrea is a superb scientist. I love his explanations. Thank you!

almost 8 years since the video was made and i still think this is one of the best explanations i can find for my tiny brain to comprehend the basic definition of quantum computing.

For those wandering, why when you add up the coefficients in front of the possible states of the electron spin at 1:35 you don’t find one (which would mean he made an error in the probabilities) , it’s because these numbers are just coefficients, if you want to get the actual probability of getting an electron spin up/down, you have to square the coefficients: (0,80)^2 = 0,64 (0,60)^2 = 0,36 And when you sum up these numbers you get one.

I have what scientists call QI or Quantum Intelligence, which exists in two states, before you measure it, I am both Intelligent and not, but once you measure it, what you find is that I am not intelligent 99% of the time. By the way, I don't even understand this enough to make an appropriate metaphor, and this is the 1% trying it's hardest here.

Yes, but how does the computer *actually* work? How does it store a qubit? How does it entangle the qubits? How does it read the basis state? How is he algorithm strucured?

Finally someone actually explained how they work! I’ve know for years about how, “it’s nothing like a classical computer, it can have bits in superposition” but no one told me how to read the qbits or how they interact.

I remember my physics professor at Georgia Tech was building a quantum computer back in the early 2000’s, but it was probably a 2^1 or 2*2 Qbits at that point, 😂. Smarter than I’ll ever be!

Tha guy's accent, it's legendary.

i lost it at 0:00

professor Morello is amazing he can explain this complex concepts so easily... the rockstar of Physics

Finally, with this I can run task manager at 60 fps

When you accept to wear in a big red atom disguise, that's the moment when we know you're truely dedicated to you channel!

I guess the future is hybrid CPU's. Just like we use specialized CPUs called GPUs to render images, we will use QPUs (?) to calculate something which benifits from it, while still using CPUs for all the other cases.

This is probably one of the most confusing topics but the professor handled it very well.

I would love to see another video from you on the advancements (if any) made in quantum computing !

Andrea Morello is my new hero. Explains things so nicely!

I really like that dude, his eyes are so expressive. Bitchin soul patch too.

Love the clarity the prof has and the nice silliness of breaking it down to my level 😀

It's amazing how well the professor explained it! High level overview, while also mentioning all the relevant stuff.

That physicist thought he was explaining himself but he really wasn't..

Well that explains a lot, still don't know a thing

Just loved that he did explain in the technical but understandable terms, and as a highschool physical chemist student, I understand all this very well. Also love the nutsell telling that it just won't be improving our classical computing like browsing web or stuff

This is the most amazing ~6-minute explanation of quantum computing principle that I had ever seen.

I admire how accurately and gracefully Andrea dissipates all the myths built around quantum computers.

0:40 *BING*

I have more simpler analogous example for everyone to understand here. Mr X can understand 1 question from one of the 3 people throwing questions at him, at a time. So he will take 3 turns to understands all 3 ppl 1 by 1. But here we have the genius Mr . Y. He has the special ability to absorb all 3 questions at the same time. Why wait 1 by 1 when you could take all at once ?? !! Awesome isnt it?? Now 2 Mr X (2 bits) will understand 2 questions at a time. But 2 Mr Y (2 qubits) will understand 2^2^6=256 questions at a time !! Because they can superimpose their input ability in exponential!! Keep adding Mr. Y (the qubit) and you get the capability to absorb billions of times larger amounts of questions in 1 go. Freaking awesome !! Done. ------ Now talk about why they so large and ultra expensive?? Quantum computer basically lifts the limits of hardware construction. Current cpu design is such that it can only be some mm thick. But quantum computer breaks this limit and goes all way up in hardware, thus you se those huge quantum CPUs. More simple: Like intel or Amd cannot make faster cpu by increasing cpu size, it's counter productive and that cpu will not work. Like your brain cannot be the size of an elephant to make it more powerful, it will err and die. But quantum cpu can be made as bigger as you want and it's processing power will keep multiplying exponentially!!! Thus it breaks the limits of current microarchitecture and utilizes full hardware possibilities in all directions. But the problem of cost and power consumption will remain there...it will all depend how much semiconductor technology advance, allowing some smaller quantum computers still millions of times faster reach to the public. Will take some decades though. Until then, we will only see them installed in big tech firms.

This is by far the best explanation i've seen to date on Quantum computing. BRAVO!

0:40 Ping! 0:57 Ping!

but can it run crysis 3 at ultra?

The video is a gem! The man at the end really caps it up good explaining the math bit

this is such a great well-rounded explanation, thank you!

i watched this three times, just enough to gain 3% of what he is explaining. Im taking what little i have learned and protecting my sanity.

0:40 - "bing" that made my day.

Andrea Morello is an amazing teacher! Thanks for that!

This is one of the most clear explanations I have ever heard for info that is new to me.

this is the best explanation of qbits i've ever heard. thanks!

Seriously... when this guy looks at the camera I'm sure he can read my mind.

1:09 the sound of turning needle other way

This is the best explanation I have heard yet of how quantum computing actually works and what it is good for

Don't understand a thing but still watching.

He talked me out of building one.

More please, this just seemed like a pre-roll introduction, with the good explained stuff to follow

Very interesting, educational and nicely done video! Great job :)

That long haired guy is an example of a great communicator; I think it's very easy for similarly intelligent guys to spew tech talk that passes over many heads

Why do I like veritasium dressed as phosphorus atom so much?

Amazing!! Thank you so much. It's a big help in figuring out what I'd really like to learn more about as I complete my degree (engineering physics).

This is probably the best explanation from all the comments I dug through...... "ideally each q-bit should be in either state 0 or 1. That state can be reached by aligning it with or against the magnetic field. They align it by giving each q-bit a coefficient of something, which they didnt explain. Once it is in state 0 or 1, it's just like a classical computer from there onwards." My replay.... Yes, he did not explain the coefficient. But your mentioning of alignment is related to the coefficient does make sense. I just hope that he explains that further. He said, in classical bits, all you have to do is giving 2 number of information (i.e. 00, 01, 10 or 11), but in two qubit system, you need to give 4 coefficient numbers in order to define the state of the two qubit system. Ah, I think you are right....the coefficient is related to the magnetic field. And that's how it is measured or stored. By having a certain amount of magnetic coefficient, the N-qubit system will be forced to be a certain state and that is how it's measured. AHHHHH....

veritasium dressed as a phosphorus atom is my fetish

so basically you need (n * precision)^2 normal bits to determine a single qbit. For example with regular 32 bits floating point variables you'll need 128 bits to determine 2 qbits.

great explanation , thank you , i needed to hear exactly that ; a short introduction to quantum physics may help but the title perfectly matches the content

Well, I never expected it to be like this. I got the idea of quantum computing (last year - 2020) even before I came across this vid. My basic concept was to make components smaller than what it is today. So small that it would use sub-atomic particles to process information, like some sort of hyper computer. Now I came to know that these computers actually exist and are "not" suitable for personal use.

No computer is out of the realm of the blue screen of death!

What I'm still having trouble understanding is how can we get useful results out of a machine whose state is based in probability and chance. I've been looking up answers all day, but very few make sense to me.

In this video, Quantum Computers are explained so wonderfully, I am very much convinced the potential Super Comps can hold for our future is truly very immense. Very neat and simple explaination! Love the video❤

From what I understand; classical bits can have two positions and can carry the information with combination of these positions. But in quantum computation every qubit can have a unique position(unique mathematical numbers for its position) which can indicate a spesific result, and which can have incredible amount of different combinations. That means a singular qubit by itself can carry the meaning of big amounts of classical bit combinations. As qubits increase and the number of computation steps increases, those dozens or maybe hundreds of qubits can carry the weight of impossible amount of classical bits. But only on that spesific task. (please if you got it better correct me)

that long heir guy looks like a head of Vampire club xD

I was thinking: "Wait... is he italian?" Me controlling that he has an italian name: "Yes"

I am watching thiss video today, after 10 years when this video was released, and this is way better than present videos on YT.

Highly informative video. Thanks a lot for your efforts.

0:39 Ping

i didnt understand anything, but was oddly compelled to keep watching...

KZfaq suddenly decided to recommend this cool video after 10 years 😅

Correct me if I am wrong, but what I gathered here are two things. 1. Quantum computers are more like Quantum storage devices where they store 2^n bits in a space of n bits (thanks to super position) 1.a Also you don't want to read the values in those bits during a calculation. 2. You also need a specially tailored algorithm that can store the bits and perform certain sets of classical operations using a proxy quantum operation, like instead of adding a number 5 times, you are able to directly multiply with 5. 2.b Once the operation is done, you can measure the output and get the answer and the data is lost.

Its interesting that he says they can be both 0 and 1 at the same time. I'd venture to say that, they are not 0 and 1, at the same time. Instead, they are interchanging, just at such a rapid rate it is perceived as being at the same time.

He does a great job at explaining it. Picks his words with great care. Now I want to know which types of calculations would benefit from quantum computing.

Professor of the year. Great at explaining things in a way I understand.

This is the most excellant (?)(😄) explanation of quantum computing that I have discovered so far. This presentation communicates well how exciting the technology promises to become

I'm not even good at math, but I have somewhat of an understanding of how quantum computing works...and this guy is a very good teacher. His explanation was fairly clear for a layman like my self.

Cool. I always thought Quantum Computers are the perfect thing to replace traditional silicon-based computers. Turns out I was wrong. Thanks a lot for the very helpful information!

Excellent presentation!

My goodness, I am not sure if I understood it correctly, but this video was sooo educational! Thank you very much!

its taken me almost 4 years to understand anything said in this video

So, basically, it's good for making huge combinations in a short time period, but not for transforming information, because the position of each electron has to be measured every time. So it's good for storing data and data analysis, as I understand. Think of a grid of electrons that can go up and down, instead of the classic bit, where the electrons have to go back and forth.

I love this man. This was an awesome explanation. Thank you.

Frequency of looking vs. spin rate is key to superposing states. If you look three times per record, you can get 3 states: spin up, spin down or spin up & down. With a delay, you could rotate that 90° for 3 more states, for 6 states per 2+delay intervals.of 3 looks.

Basically you won't be able to watch porn faster, but it'll solve your math homework in a blink of an eye.

This is the first time I actually understand the real difference between a Quantum computer vs a legacy one! Thank you heaps!

Very beautifully explained ! Thank You ! Really appreciate it !

This was an excellent explanation and I've listened to a few.

One of the best explanation I ever heard!!!

That guy is amazing(ly brilliant). He explains it well enough, despite the language barrier.

I just watched umteen other videos - that were all newer - and had worse explanations than this. And yet this one is 10 years old and just NAILS it in seven cruisy minutes. Thankyou Vertitassium, and thankyou Andrea Morello from ten years ago. Amazing.

I didnt think it would be that hard to move a compass needle but his "ehh" just proved it was hard

So quantum computers aren't fast due to their individual operations being faster, but due to the fact that they require far fewer operations. Very insightful. Imagine a classical program that outputs you the quickest route to get from your house to the store. It must analyze every possible path there in order to compare and determine which path is shortest. It does this incredibly quick, however it requires enormous amounts of operations to give you the answer. A quantum computer, on the other hand, can process every possible path simultaneously, therefore requiring far fewer operations in the first place.

yeah but...can it run crysis?

He did a good of explaining it so that It could be understood. Very clear and informative. Thanks.

“The speed is not in the amount of operations that it can perform but just in the amount of operations it needs to get to the mathematical result”. He couldn’t have been explained better, this is awesome.

Amazing job! Greatly appreciate all the work you do, I've never seen anyone who would be able to explain such a complex topic in just 6 minutes

How would you debug a quantum computer?

Such a great explanation! 👌🏼

That man is smart. The mark of a brilliant person is them knowing how to dumb down incredibly complex stuff to a level that anyone with zero knowledge on the subject can understand. Amazing teacher this guy is