# You don't know how Quantum Computers work!

0:00 Intro – Why Quantum Computers Shouldn’t Work

1:22 A Toy Problem

4:00 Solving the Problem With Quantum Computing

10:11 Why Does it Work

13:12 More Practical Problems

15:02 Outro – Quantum Computers Are Coming

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Building the Bits and Qubits:

Video on quantum security coming “soon”

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Quantum Computing for Computer Scientists

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Richard Feynman

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It is quite difficult to understand if you got stuck in binary digital computing (math) ie, boolean algebra (logic).It is easier if you empty your mind before getting into this quantum stuff.A [classical] Binary adder is simply an Exclusive-OR (XOR) gate plus an AND gate (for the carry bit)So 1 XOR 1 is 0 plus the carry bit of 1, hence 1 + 1 = 10 binary = 2 decimal.And if you link 64 of these binary adders, you get a 64-bit adder.How to do 1 plus 1 in quantum computer ? well, I guess it is a wrong question.

hey thAT PIano music!!!!!!!!!!!||;

'Don't use this term on an exam'

"future" shapes the past ?

Interesting, so essentially a Quantum Computer is like a wormhole that shortens the distance between star systems.

1000101010010101010000101111110100101010100010011111010010000011111010111010101101001101001?

This video is amazing.Thank you very much!

Quantum Computers have caught my interest from the mandela effect, but now it has really taken my attention with randonautica.

This is an amazing explanation! Most other videos tend to skip over WHY quantum computing can operate faster than normal, opting instead to amaze people with fancy language about how a particle being in 2 states at once is somehow magical. This video really helped me understand how a qubit can convey information more efficiently than a bit under the right circumstances. Thank you!If anyone wants a more mathematical explanation of Hadamard gates, this talk does a pretty good job: https://www.youtube.com/watch?v=F_Riqjdh2oM

Yeah, big amount of neurons time.

I… didn't understand any of this, but I still liked watching it.

i found an ad over half an hour long

I unterstood everything in the video but then you said that qubit x magically flips from right to left and then I was totally confused…

Or do I?

This might be random but… I feel like you're dani, a youtuber who makes games and stuff…

In other words "Take a Guess" .

Very interesting but how do I pay taxes?

"Quantum computers can't do anything that classical ones can't"TRUE RANDOM NUMBER GENERATORS

Title: You dont know how a Quantum Computer works!Me: cries in binary

You should have mentioned C and D were quantum "And" and "Nand" gate so the inputs multiply

So if I understand this correctly, with this solution we can still never know if the circuit is of type A, B, C or D? We can only see if it is "Laid-back" or "Needy"? So we still need to query the system twice? In that case we haven't done anything better than a classical system… Or am I missing something?

I am even more confused after watching this video

13:18 i was expecting a Nord VPN sponsorship right there.

The most understandable quantum computation video ever!!!

?♂️ .. ight imma head out

Thank man! You explain very clearly how quantum computers work, I get it now. But there is a part that I don't understand, which is:- WHAT IS A QUANTUM COMPUTER ?- I DO NOT UNDERSTAND ANYTHING OF THIS- WHAT THE HELL IS GOING ON,- WHY AM I WATCHING THIS VIDEO ?????????????????????????????????????????????

Yes I Don't know,Thats Why I came here.

what in the fuck?

About floating point representation of irrational numbers overlapping using qbits. Is it possible to represent, for example, sqrt (2) without loss of precision on a quantum computer before reading and collapsing the overlay?

Thanks for your effort making this video, it helped me understand quantum better. But I don't buy into all this mysteriousness and elitism of quantum. If concepts are explained in the correct sequence, there's no reason why anyone shouldn't understand them. That learning sequence should start with explaining every pertinent property of a qubit. Its not clear why you chose the label "right" for a qubit in superposition until we reached solution time, when you introduced the possibility of a qubit being "left". This is counter-intuitive for anyone who has worked with sign-less bits and should be addressed up front.

Wait a minute ,if i dont understand quantum mechanics does that mean i know it or i dont ,but deep down i know i dont know a heck about it ,but if i say i dont know quantum mechanics am i in superposition state of 4 possibilities where i know quantum mechanics,i know a little about quantum mechanics,i dont know a little about quantum mechanics ,and i dont know anything about quantum mechanics .But what if i say i know quantum mechanics ,does that mean i dont know quanyum mechanics or i know quantum mechanics or in between .But i already know the answer to that and i left it to you the reader to find out ,tricky ah .This is short written form about the shitty video above .no one is going to get anything out of it.

Couldn't you use normal bits to emulate a qubit. You could have a huge array of qubits, with each storing either a 1 or a 0 with additional probability data tacked on. If you want to entangle 2 qubits just add more information saying adopt the state of an entangled qubit only if its state is 1 or 0 with no probability data. All these "quGates" could be programmed in, using if statements. If someone know all the behaviors of these quantum particles you could build a "fake" quantum computer out of a regular one, without providing the conditions needed with a "real" quantum computer.The only real question with this video is, how do you get an answer and what kind of data would you provide?

I understand quantum.

ny friend i,m from indonesia and you from america .if i go to america what am i…a citizen or a toerist….so my friend i will always be a 0 and you will be the one or vice versa……..i think i understand Quantum Computers

Ohhhh, so quantum computers are magic? Cool, thanks.

when I feel like someone is watching my deep understanding of quantum concepts it vanishes.

Was all that applied in the Google machine? And if so, does all that implies that the particles used are entangled (you need to create them)? In order to predict the states, it sounds like they should be.

Honestly bro, you explained qbit the best, with first video ofcourse. Other video seems just repeating another explanation which lead to another confusion. At first I thought it just doesnt make sense to process a random rotating qbit and how qbit become 1 and 0 at the same time. Now i can sleep.

well, very nice desciption, probably one maaningfull of 1000 around… so its also that qubit inputs are in fact 2D complex numbers (very hard to encode there, btw), so in fact analog signal where the outputs of quantum gates are always by-design collapsed digital results only? so in fact, it can be simulated also as analog computer ALU made of op-amps? (well, 1D real numbers? very aproximated explanation??)

I got lost at superposition because i pause it to sleep for a second