How Quantum Entanglement Works

In which we explore the implications of entanglement.
Quantum Computing Playlist: • Quantum Computing
Music (licensed under CC-BY): freemusicarchive.org/music/Me...
00:00 Intro
00:36 Probabilities Of Entangled Systems
02:37 Single-Qubit Gate in a Multi-Qubit System
3:49 Scaling Up To Three Qubits
4:54 H Gate Troubles
5:44 Using Complex Numbers
7:45 Matrix Multiplication Troubles
9:51 The Born Rule
10:24 Multiplying H By H
11:03 The H Gate In A Larger Circuit
12:11 Proving Entanglement Exists
13:41 Review

[@youtubeaccount1320]

You are such a gem. I am looking forward to seeing you get famous. Regarding Content you are right up there with 3B1B, PBS Space Time and all the others. Keep it up!

[@tommatthieen5017]

I agree. Im always coming back for the content on quantum computing. Hope he will release more of this

[@fabianfarina2181]

Those are some high-quality videos you are producing here! You will have a lot more followers in no time, thus I am glad I found you already and you might be reading my suggestion. There are already some good videos on quantum computation on KZbin, but there are only a few that consider higher energy levels. Thus it would be great if you could also create something about qudits (d-dim qubits) a few videos down the line. This will certainly be the future of quantum computing and you can already create qutrits (3-dim qubits) using qiskit's Pulse. No matter if this is something that might be interesting to you, keep on the good work. I will be happy to see some more of your takes on the field of quantum computing.

[@kummer45]

You are gifted. A highly educated mind can’t produce this. It requires art, presentation and script writing for the video. The timing of the images while reading the sentences are perfectly coordinated. You know how the mind works animating reasonings with images.

[@gballen47807]

These are great thank you so much for doing them! I do have a suggestion, though. Sometimes I pause the video to take a look of the probabilities of the qubits in the tensors. However when the video is paused, you can’t tell easily which values in the measurement gate are variable. If you made any variable ones yellow instead of white, then, during a pause, you could easily tell.

[@nzuckman]

Bro you're making my Friday right here

[@ethanduggan7347]

I can't believe how few views and subscribers this channel has. I cannot overstate how valuable a resource these videos are. Not only incredibly informative and intuitive but also very well produced for what they are. I hope this channel experiences the exponential growth it deserves. This guy is the 3blue1brown of quantum computing.

[@toddherman380]

I can...Have you interacted with humans lately?

[@thereaper_xxx]

This is what I call quality and underrated content. I hope you get the attention you deserve. Amazing video. I watched your other videos as well. It's obvious that you put effort and time in them. Keep up the great work.

[@karlrombauts4909]

I just wanted to express how fantastic these videos are. I can only begin to imagine how much work these videos are to make. You have managed to pack so much information into them and explain everything so clearly. Thank you so much for creating such awesome content 😊

[@jorgecarrascopollo6306]

keep it on man. I found your channel a few months ago on a reddit post and you have posted nothing but huge quality content. I suppose you are not doing it for the views but you do actually deserve them.

[@motbus3]

These are one the best explanations about qubits and entanglement that I ever saw. Thank you!!!

[@georhodiumgeo9827]

I know your videos must require a lot of work so I wanted to pass an idea to you. I have heard that the D-Wave computer is not a "real" quantum computer and I have not been able to find a reason for why. More generally it seems like there are different "levels" of quantum computers or "kinds" where some functionalities are possible but others are not. If I am understanding correctly it seems like there is a spectrum of capabilities in these systems. Like at the most basic end you have something that acts more like an analog computer and at the other end you have a "true" quantum computer with a bunch of stuff in the middle. I would die for an explanation on this and it would probably be a video you would not need to do any animations for. Just a talking head for a couple min. At any rate I am sharing your channel and hope you get KZbin's algorithms to notice you. FYI this was at the top of my feed so it seems to be working. Good luck!

[@megadog9305]

This is an awesome series. Looking forward to episode 4!

[@ac3_train3r_blak34]

This is brilliantly done. I hope you're considering continuing the series!

[@lmahesh26]

Hey love the graphic style and the calm explanation. Keep it up dude

[@loliganz]

Keep up the great work! I'm looking forward to future videos on this subject. Thank you!!

[@Optimus6128]

Getting there to understanding, but need more to totally grasp, I hope to see video 4

[@sumeshrajurkar5922]

The explanation and content is great. Looking forward for more videos.

[@kamikaze7415]

Hey man, Love the video. The best explanation of this process I've seen so far, really concise. Loved your new ray tracing video too, your style is unique and I really like it. Keen to see more of you on my recommended!

[@byaafacehead]

Great series, will need to rewatch to digest haha. Helpful animations, and good sounds & music to accompany them as well!

[@albert6157]

This is amazing, im definitely sharing this to all my friends who wants to understand quantum computing in depth!

[@Rockyzach88]

This is good stuff. Who knew Quantum computing would be so accessible theory wise.

[@mukeshkamble5533]

Your presentation is amazing, eager to watch next

[@VHenrik007]

Incredible quality! Thank you!

[@adblockturnedoff4515]

Great video!! Came from the ray-tracing (good reco YT 👍) video and explored all your videos and have subbed as well!! You have a very distinct way of explaining things and...it just works!!! I love it. Now heres to hoping that you will continue and give this series on quantum computing a satisfactory ending (though the field of study itself has no end!!) before you move on to topics that interest you more currently to make videos on 🤞🙏

[@mMaximus56789]

This is so good! Hope you make part 3

[@EricKolotyluk]

These are really great videos... I would love to see more.

[@development3383]

Grow channel, grow! We need this to be financially viable for him to do this full time. His method of teaching is a value tool for all

[@smoosq9501]

i love seeing this! you are such a amazing lecturer

[@khoda81]

These vids are gold. great explanations with nice visuals. so underrated

[@Nizo1]

i agree

[@rafaelv9121]

Hold on. Did I just really find a youtube channel with only 1000 subs and this level of quality? That's super weird... Well... let's make it 1001 subs :D

[@q1blaqi]

great video! cant wait for the next!

[@wishsrdk]

Woahhh! This is awesome. We need more explanation though. May I recommend capturing the essence of entanglement before getting into the details

[@LifeIzBeautiful10]

Very well done!

[@romelian3754]

Amazing Visuals!

[@best_model]

Thanks for this video. Just one point that needs to be taken into account. The ordering in Qiskit is little-endian meaning that if the first qubit state is |0> and the second one is |1>, the two-qubit state would be |10> not |01>.

[@theimperial9858]

Hey friend, this is the only video that is truely affordable for people like me to get into quantum entanglement. When is the next video on this topic, I've been waiting for a year??? Please!

[@CompilerHack]

The complex representation bit is so awesome

[@rockapedra1130]

You are amazing, please keep going!

[@carloselfrancos7205]

Very good and interesting !!!!

[@Shaunmcdonogh-shaunsurfing]

Can’t wait for the next video

[@blacklistnr1]

Intro: "Welcome to part X of my Quantum Computing series, today we'll talk about Quantum Entaglement, it assumes you've watched the other videos alreeady, here's a link if you haven't" Title: "How Quantum Entaglement Works | Quantum Computing Part X" Me: "Oh wow, thank you for not making me watch half a video to realize the there are dependent videos I should watch to not have to pause every 2 seconds to decipher what is on screen while searching wikipedia for the gates and correlating the top representation with the bottom one to figure out what it means, such a helpful time saver!"

[@user-se1bg4ck8h]

Looking forward to the update

[@user-tr2pc7xs8d]

Thank you! It's a 3b1b or science click quality. It's very useful for every physicist to become familiar with the modern application of quantum mechanics to quantum computing. Hello from physics theorist from SPbAU RAS ;)

[@jordanpeterson8414]

Thx for your videos

[@9remi]

great video, instant sub

[@erikziak1249]

Interesting. Looking forward to see more videos on this topic. The presentation is really great. I wonder if the talking is a human being or a machine. Maybe I am just imagining things.

[@staristo2355]

Pretty awesome! Stumbled upon this and immediately subbed. Do you plan to keep producing these? Wish you tons of new subs to gain momentum!

[@Nizo1]

same

[@VeLawrence]

Hi Josh thanks for these wonderful videos, this is deep, intense and brilliant! may I ask where the next video about Grover´s algorithm is? I couldn´t find it in your channel, thanks in advance!

[@giuseppecognome3647]

i love ur videoz, but the song linked in the description does not look like the one used in ur videos. I would like to know where I can find the background music of ur videos

[@KarthikNaga329]

Wonderful! When does the 4th video come out?

[@theimperial9858]

Where is the next video.... I'm craving

[@AVUREDUES54]

This is amazing! You should consider making a patreon

[@challow90221]

What video is the prerequisite for this one?

[@pabloagsutinnavavieyra2308]

Wish you could come back to explain Grover's algorithm. I'm very curious about it!

[@luanmartinsverissimo8128]

Hey Josh, i just found you channel for youtube recommendation and i found incredible, congratulations. I'm Physicist in my third year PhD on condensed matter and computational physics, i wanna ask you which tools do you used to produce this videos ? I'm working in improve my presentations, i think this tools can help me into it. Thank you, congratulations again !

[@JoshsHandle]

Glad you enjoyed it! I use a tool called Blender to make the graphics, although be warned that it comes with a bit of a vertical learning curve - it's intended for general CGI so its feature set is pretty dense.

[@JoshsHandle]

One tool which works very well for making explanatory animations is Manim - originally created by Grant Sanderson of 3blue1brown. docs.manim.community/en/stable/index.html

[@luanmartinsverissimo8128]

@@JoshsHandle Oh sure, Blender ! Yeah i know it, I already tried for fun. But in fact, there's an huge learning curve to make something really interesting. About the Manim package, i didn't knew it, althoug Ii know 3blue1brown youtube channel. I'll take an close look, thank you !

[@jullyanolino]

Which is the simulator used in the video?

[@cheese_man2717]

I found you because of the kurzgesagt video but this is nice

[@ravv4]

This video series is really good. Where can I find the on Grover's algorith?

[@bean8287]

7:32 Physically indistinguishable phase difference maybe explains which of many worlds we are in?

[@renrub7]

Damn such a good video even if i dont get it lol, i love the presentation!

[@seunghyeoklee9043]

13:52 shouldn't 01 and 11 flip probabilities because the control quibit here is the diamond shaped qubit?

[@burieddreamer]

I got lost at 1:10 mark. Next time I plan on understanding 10 more seconds.

[@BlueTJLP]

What happened to this video series? I hope it will go on. It is pretty great

[@rahulshelke7888]

Why you deleted the old version of it?

[@MiguelLopez-uo3vl]

how do we make sure our clever tricks perform useful information!? instead of random a sampling of the outcomes?

[@zyziux]

So it appears that quantum computing is not that impossible to understand :D THANX!!!!

[@kwccoin3115]

Still struggle with the notation row vector x matrix instead of normal matrix x column vector (extract differently column and row respectively ?) , the born rule and the h h trust of entanglement. (But will check out the h h after entanglement.) in fact so far wonder why all these linear equation seems strange … but if there is a way change the way it works it makes sense. Just how to “program” the simulator. Tracing all these?

[@AmaroqStarwind]

What about quantum annealing qubits, like what D-Wave uses?

[@damianzieba5133]

How to make a qubit adder?

[@haelium5718]

This was a really good video and I am disappointed that you never explained Grover's Algorithm, how much beer do I have to buy you to make it happen?

[@yuhanglei5318]

Hello,Josh,I really like your works about quantum computing and quantum theories.The images are ingenious and you always explained profound theories in simple language. I really want to share it to science lovers in my country. Can I move and translate your works to Chinese website? I will indicate the author and your youtube address,and i won't use it for any commercial purposes.

[@aarontoderash6028]

Where is the donation button? Josh, we want more!

[@jeffanderson5396]

I think this implies that a pair of entangles qbits is also like a quaternion. If so, would you say that 3 entangled qbits has probabilities modeled by an octonion?

[@christopherevansanders3629]

Also if you take more of anything and put them together it can carry more. The cat is alive till it dies so if you know the rate of decay of the radioactive substance and when it will cause the Geiger counter to pick up the radiation and break the poison then you know when the cat will die probably but if you take the cat's health age the batteries in the Geiger counter the amount of oxygen in the box which in this case is the defining factor since this box is sealed so you know the time it takes for the cat to use all the oxygen in any given amount of space and die so unless the cat has sudden heart attack or stroke the cat is for sure alive for the amount of time it takes for the oxygen level in the box to reach a point it will no longer keep the cat alive which will happen way before dehydration and starvation which both would still happen before the poison so your paradox is flawed to a very small window of time depending on the initial size of your box

[@ArpanMukhopadhyay93]

Hi Josh! Just discovered your channel. Not uploading new videos?

[@youforgotthelinkinthedescr6798]

I like your funny words magic man

[@omridrori3286]

hey where is the video on qunatum computing disappear?

[@omridrori3286]

???????

[@wWvwvV]

New video idea: what is the difference between analog computers and quantum computers? I have the intuition it was explained in this video.

[@g1.wh4t.2p]

loooooove

[@paulromsky9527]

Great video series. I am confused. In this and your other videos, the Not (Inverter) gate is the X gate (ok, I see why with the Bloch Sphere). In this video you use a X gate at 2:45 as a Not (inverter)...ok, but when you "control" the inverter (Controlled Not gate) at 1:23 you show it as a "+" rather than a "X"... why? The + makes sense, but why change the symbology?... that confuses us newbies unless you explain why. Hey, it is a complex (no pun intended) subject, so one can expect you may need to "refine" your lessons as it touches more students - it's the same with me - I am always tweaking my lessons for content and improvement. The reason I am learning Quantum Computing is because one of my Summer STEM students asked me to discuss Quantum Computing in my Summer STEM class. We are all watching your videos now and this will be one of my STEM subjects next Summer. Thanks.

[@Priya_dancelover]

next video pleaseee

[@georhodiumgeo9827]

3rd comment! This channel is going to blow up. I'm going to be famous!

[@HenryCasillas]

💜

[@someguy8365]

Earned a sub from me

[@NotNecessarily-ip4vc]

In quantum physics you gotta use Leibniz's calculus and not Newton's calculus. What is the difference between Newton and Leibniz calculus? Newton's calculus is about functions. Leibniz's calculus is about relations defined by constraints. In Newton's calculus, there is (what would now be called) a limit built into every operation. In Leibniz's calculus, the limit is a separate operation.

[@robertmcknightmusic]

ok and so how does quantum entanglement work? jks, great channel! I'm learning lots!

[@drdrmadsen]

I have never felt so inadequate and small

[@cosminanton5419]

I would love it if those bloch spheres didn't move. It's more difficult to see them clearly like that :( Still a very good video though!

[@samiadel7043]

❤️💜❤️

[@BornAgainstAll]

Please don't tell me you died. I need more.

[@ahndeux]

This video makes perfect sense when you are high on drugs and loaded with alcohol at the same time. SCIENCE!

[@sh1ptoast278]

It's 2:42 AM What am I doing

[@Juuhimuuhi]

I feel like I understood everything but at the same time I didn't understand one bit (no pun intended)

[@marcelopau2325]

it would be great if this channel could be translated into Spanish

[@gta5onlineshorts]

maybe youtube algorithm uses h gate 😅

[@vaakdemandante8772]

Unfortunately this does not feel like a more digestible explanation of entanglement - maybe in a strictly computational way, but then again it's just simpler to mindlessly apply the rules to get the results. The visual style is interesting but I just don't see how it adds to the explanation - in fact, I don't really know what is being explained here. Like, what is the problem at hand that this solves? I always thought that quantum mechanics in academia is too convoluted and this way of presenting it only adds to my confusion.

[@woxgamer7044]

Am I dumb for not understanding the visual for entanglement?

[@JoshsHandle]

Admittedly, this video was made before I started checking with people that my explanations made sense before publishing things.

[@woxgamer7044]

@@JoshsHandle It's not the explanation I was having an issue with, rather the visual representation for entanglement itself, I couldn't understand how the drawing worked.

[@Zamicol]

@13:00 is absurd. The simpler explanation is the Universe has an infinite black box that creates information? Entropy/Information has a cost.

[@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

[@hectoruset1354]

it confuses me because it looks like a christmas tree