Logic Gates Rotate Qubits

In which we explore the strange effects of quantum logic gates, and what that tells us about the nature of qubits.
Quantum computing playlist: • Quantum Computing
Music (licensed under CC-BY): freemusicarchive.org/music/Me...
0:00 Intro
0:16 Classical Bits
0:38 Similar Qubit Behavior
1:20 The Hadamard Gate
2:56 Measurement
4:25 Measuring Between H Gates
5:02 The Bloch Sphere
5:43 Logic Gates As Rotations
7:16 Review

[@Eznid]

Out of maybe dozens I have seen so far, this is the only one that is not a clickbait offering only useless regurgitated platitudes without any real understanding by the "content-creator" of anything quantum physics or quantum computing.

[@dialectphilosophy]

These videos are very well done. Straightforward explanations and breaks the concepts down in easy to grasp ways… can’t wait to see more!

[@noivongxoang235]

Straightforward, I can't even tell how does it related to the entanglement phenomenon and ........

[@rockapedra1130]

I've seen many videos attempting to explain this and just creating massive confusion. Yours, on the other hand, finally nailed it for me. Thank you! You are a gifted communicator!

[@PrayookJatesiktat]

I really like the way you explain the Hadamard Gate.

[@richtigmann1]

This was a beautiful illustration, just a really good general explanation of how Qubits work in a quantum computer, with nice sound effects and all! Just amazing.

[@guregori_san1188]

this is so beautiful, your video is a peace of art. If only we had this kind of teaching in school we would all be scientist.

[@CSRookie22]

Thanks for your videos! I am a CS major person, but when I see these videos about math, it just makes me go “wow”

[@novachromatic]

I'm currently learning quantum computing under Qubit by Qubit, and I can vouch for the quality of this video in teaching some of those hard-to-grasp concepts!

[@memecrat9634]

Did you pay the tuition?

[@novachromatic]

@@memecrat9634 Nope, my school partnered with QxQ so that it was a free online course.

[@dryoldcrabman6890]

Bro these are the best videos on this I've ever seem. You have no idea how helpful these are.

[@yxlop4893]

Another amazing video, hope to see much more about the topic explained so clearly.

[@Tomas-zv2js]

You have made this video very easy to understand the basics of qiskit. Thank you!

[@parassharma3567]

What a great explanation! To the point explanation is very essential for someone looking to just understand the fundamentals in a clear and concise way. Please keep making awesome vids.

[@poey2811]

this is so well made and underrated dude thank you so much

[@tedn6855]

This is a great video. Thank you for being the first person the make sense on this topic.

[@minedcaesar7]

The sound design in your videos is amazing. Never seen anything like it. Reminds me of a well made game. Good job

[@kmunson007]

Pure gold! Thanks for this video. Reinforces the saying, if you know something really well, you can explain it simply.

[@mMaximus56789]

This is easily the best explanation of what is and how a qbit works

[@darinpeev5820]

Extremely original and professional!

[@billelkactuz1303]

Great job, Josh! The quality, clarity and beauty of your explanations put my college professors' to shame. Thank you so much for uploading this!! Your effort is greatly appreciated :D

[@martino76256]

Hope you keep up making videos like these, by far the most in depth, yet understandable videos on quantum computing I've found so far

[@gemini_537]

This is a fantastic video for quantum beginners like me! Thank you! Keep up the good work!

[@kbejustervesenet7261]

Really good explanation of the quantum-gates.

[@rockapedra1130]

Excellent explanation and excellent graphics!

[@downformaintenance]

This is wonderful, thanks so much. Every other quantum computing explainer I've seen on YT basically says, it's a qubit then some magic happens. I've always thought it must be too complicated.

[@robertholtz]

Outstanding video.

[@waterresources3245]

Very cool thought process

[@QuantumSquirrel]

I agree with others, excellent videos, animations, and explanations. Difficult subject so thank you for helping to break it down.

[@ksumanth4464]

Awesome explanation!

[@rafaelpascoaliczerniej297]

truly fascinating

[@PrestonRahim]

Josh, these videos are awesome. You're a fantastic explainer. You've done a great job at breaking down the concepts of quantum computing from the perspective of a computer scientist. I'm not sure if this is in your video roadmap, but do you plan to explain how all of this is actually implemented? I understand that classical computers use transistors and relative voltages on wires in order to store and transmit information. On a physical level, do you have any good readings on how quantum computers perform these tasks?

[@user-rg4lu9bt6q]

Great video. Thank you very much

[@77rezaa]

Nicely done, thank you.

[@alexengineering3754]

Best explanation to start this topic i think

[@MithoThoup]

Ive got a presentation on quantum computers next week and this vid saved my life

[@physicsandmaths7013]

this videos are very great and well done and i was wondering why are millions watching it

[@adeebh.s1915]

I think you should explain how a bloch sphere is formed or else it'll confuse the viewers, since people might think that only 2 dimensional are required to represent a Qubit since the basis vectors are just |0> and |1>.

[@qm3ster]

These videos are so sneaky, making me feel smart by guessing what the H gate does while we were still in a 2D circle

[@kaushalgagan6723]

This channel is op🔥

[@nice3294]

I love the visuals

[@danhorus]

Excellent video. Subscribed.

[@amalirfan]

Can't believe in my lifetime I will be witnessing the emergence of Quantum Computers, I felt old when you mentioned "Classical Computing", I am still a teen and since childhood I was fascinated by computers, but Quantum Computers are indeed more fascinating.

[@stevehan3498]

amazing videos. How are you rendering the graphics?

[@user-cv9hl9cz9e]

amazing, you are good!

[@Bob-di7nh]

Interesting video! Question: How can these quantum logic gates actually be realised? What would you physically do with the qubit to change its state? Wouldn't the state immediately collapse as soon as you'd try to do an operation?

[@martinluther3712]

Have you done this video with manin or with more programs?. Good explanation.

[@jakemuff9407]

Great video! How did you do these animations?

[@sietse992]

In the Bloch Sphere the Z-axis basically determines the probability of it being either 1 or 0 right? What exactly can be said about the X and Y axes? The sort of 'equator' (I'm sure there is a better word for this in mathematical terms...) on the sphere for example sits at a constant probability of 0.5. Does it then matter at all where on this equator line you are?

[@aidanluczkow3082]

Imma comment on all these vids just to prove I was here before you got big haha

[@Optimus6128]

I couldn't understand certain of quantum computing when there is some pop science video or article about it. For example, I could understand how can anyone computer anything with this, if the result is undefined. But maybe your videos will make me reach some understanding (although I need to do more reading). First time I hear about Hadamard and Block sphere. I don't know in practical terms how these are constructed (what kind of hardware do they use for quantum computing),. but I am almost getting something now, but not sure. I get at some places in this process things are firm, a bit is a certain bit, of coure measurement will collapse it, but some of these quantum gates might help to kind get some result. Nobody has explainded that to me. I know about the pop science of how since there is every possible state of bits, you get results in an instant, like you calculated for every possible permutation of bits, but I am still not there in how the hell to go from this "randomness" back to a specific output.

[@sen.07]

Here before it blows up

[@lucaolmastroni6270]

Gorgeous videos ! Could any one, please decode the sentence at time code 00:42, that automatic transcription writes as "the measurement gate boolean form aesthetic qubit is either zero or one" ? Thanks

[@lucaolmastroni6270]

Could it be "a measurement gate pullen form a static qubit is either zero or one" ? (Although the Past Participle is 'pulled' and not 'pullen' )Thanks

[@se_ball5086]

On the section "Measuring Between H Gates" using notation |0> => H => M(q) => H => M(q) how it is possible to use it again in H gate since it has been collapsed, and it is not in the superposition state. Can you explain this?

[@Amrit-SR]

What software do you use for these videos?

[@mobcont8335]

Too bad the channel stopped these videos. They were the first ones that i saw that really explained QC without any "le quantum magic" memes.

[@bean8287]

So Measuring... is the result actually dependent on the phase of the qubit?

[@5ty717]

Is randomization by measurement in context ~4.55 … fully 50/50 random or pseudorandom… ? And no matter the pure/ mixed state of the qubit? Or not totally random ie not a random number generator random.

[@nzuckman]

YOOOOOOOOOOOOOOOOOOOOOOO LETS GOOOOOO

[@aloysiuskurnia7643]

imagine having to write a computer without being able to peek the intermediate values because in doing so it will destroy the algorithm

[@HenryCasillas]

💜

[@mosab643]

How do you do your animations? You probably get this question a lot but I just wanted to know. Do you use Python or something, or strictly an animation software?

[@JoshsHandle]

I use Blender. It does support Python scripting though, so I've used that for a couple things, but mostly it's made with built-in Blender tools.

[@mosab643]

@@JoshsHandle How long does it take you to create these animations?

[@lukeroyka5259]

❤️

[@Eurotool]

This is f*ing magic

[@gta5onlineshorts]

so classical bits are scalars & qubits are vectors :)

[@S.G.Wallner]

The problems of measurement are scary.

[@Eurotool]

Therapeutic video

[@admaneb]

How do you rotate qubits without creating the taj mahal on the moon?

[@YahyaKhashaba]

How does the second randomiser or the qubit remember the previous state of the qubit before the first randomiser when the first randomiser randomised it (deleted it from the qubit itself) quantum info is not violated by what I am saying because the information now exists in the first randomiser which is not connected to the second one). Your premise is not at all what quantum mechanics actually do and is quite paradoxical.

[@febinthomas1133]

At 4:50 , he says that the randomness doesn't come from the h gate but it comes from the measurement. He later explains what the h gate does by using the bloch sphere.

[@TheKlimat694]

nice, uploaded 20 seconds ago

[@JoshsHandle]

And I've got another one coming up in a few minutes! :)

[@TheKlimat694]

@@JoshsHandle nice!

[@youtubeaccount1320]

@@JoshsHandle looking forward to it

[@ONRIPRESENCE]

Blender 3D!

[@larrye.goinesjr.1535]

Classical Bit To Qubit Conversion?!? X-State = (1 + -1 × X / √(X² + Y² + Z²)) / 2 Y-State = (1 + -1 × Y / √(X² + Y² + Z²)) / 2 Z-State = (1 + -1 × Z / √(X² + Y² + Z²)) / 2

[@rgloria40]

Confusion. Sounds like bullshit. Quatuam computing uses ONE ATOM.... Need a definition for ATOM GATE. Classical Computer use several ATOMS. Good thing Qbits definition is evolving. Why change the computer binary language which represent Alphabet and number system...Sounds like your explained the decimal point which is solved by the Classical computer language.

[@piyushsinghbhandari9035]

❤️