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# A Beginner’s Guide To Quantum Computing

More From: Coding Tech
9993 ratings | 571401 views
Dr. Talia Gershon, a materials scientist by training, came to IBM Research in 2012. After 4.5 years of developing next-generation solar cell materials, she got inspired to learn about quantum computing because it might enable all kinds of discoveries (including new materials). Having authored the Beginner's Guide to the QX, she passionately believes that anyone can get started learning quantum! - Maker Faire Bay Area 2017 PERMISSIONS: The original video was published on IBM Research YouTube channel with the Creative Commons Attribution license (reuse allowed). ORIGINAL SOURCE: https://www.youtube.com/watch?v=S52rxZG-zi0
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Richard B (18 hours ago)
If it’s exponential, why does each qubit have to be so small. Would the principal work mechanically if you had a small cube held inside a sphere controlled by magnets. I think there’s 24 combinations by making 90 degree turns . Brilliant video... my brain hurts, I think I got 10 percent of this .... my shoes!!!!!!! Wouldn’t this eliminate error?... image how many combinations if you measure a 1 degree turn and you had 1,000,000,000 such devices in a 1, 000 x 1,000 x 1,000 block No need for liquid nitrogen to test the principle..... Nar it’s gone , I need more toast......I’m sorry
Heath Jones (3 days ago)
LOST *Naruto* (5 days ago)
Wow.. its getting more and more complicated as I see more videos on quantum computing. Somebody help me.
Awadh Al Belushi (5 days ago)
am puzzled.............!!!!!!!
Powerman80923 (7 days ago)
11:55 Entanglement Gate... She just described exactly what a J/K flip-flop was designed to do, decades ago. This isn't new or cool.
Powerman80923 (7 days ago)
So it figures out every possible answer and magically poops out the right answer.... right. How?
Kevin McKee (7 days ago)
this is cool I cant find the link to the public site. I want to begin a quantum computer resistant encryption algorithm using a dual a binary encryption experiment for cryptocurrency to log on here. I knew I did'nt learn Q# and Qbit a couple years ago to never have an adequate emulator or better yet a real quantum computer to test out my ideas.
Ruthless Goat (8 days ago)
I think I'm going back to 6 year old videos of BigMacDavis killing lost souls on Doom.
Tom Fotheringham (10 days ago)
I've seen this exact presentation done by someone else. I think.
Saeid Poordelir (10 days ago)
I hope Quantum computing can solve sound transition problem too.
WaterBoyz (13 days ago)
right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right right
American Citizen (14 days ago)
I am happy the quantum computer was made available to the public. This is a great way to create interest and stimulate new ideas. Will be amazing to see what comes of this over then next 10 to 15 years.
Martin (14 days ago)
This video has a prerequisite: beginner's guide to quantum mechanics -- good luck with that.
Ayush Singh (15 days ago)
Boooo
Aweful explanation!
Ron Wilsontringue (17 days ago)
She is simply repeating Dario Gil's presentation - his lecture is much better
Randall Ledbetter (17 days ago)
The dinner table problem is quite easy to solve when you think about it. When your guests show up at the dinner table just seat them in the order they arrive. Like the kids game, "musical chairs" the late comers just want have a chair. Nothing nail biting here.
Rich M (17 days ago)
The enzyme problem is interesting because the actual reaction is quantum. So in some ways, to solve with a quantum computer would be actually doing the reaction....And it seems to me that a quantum computer could be some dispersive optical material that is programmed in a spatial varying lattice of index of refraction and we just pass light and see the answer on a screen, looking at spatial and wavelength properties--The coherence time being simply the coherence length of a highly pure color of a laser.
drfritz142 (17 days ago)
Very nice. At a maker faire. Wow...
Terry Ambrogio (17 days ago)
Quantum Computing also known as Glitch Computing has been around for a long time it can be emulated on a standard desktop computer.
Dave smith (18 days ago)
what is true Value of Pie in mathematical form
migf27 (20 days ago)
This is the best explanation I have seen so far.
Henrik Valerian (22 days ago)
Ok. I think I'm entangled. How do I get out of it?
Andromeda (25 days ago)
at minute 4 I just got lost
Finally I can build my own quantum computer
Christopher Joseph (29 days ago)
All these quantum computing videos use the same chess board rice example. These people aren't even smart enough to come up with their own original material!
ZigZagsss (1 month ago)
08:35 ->Dooont foool us!, probably we are able to use FOR FREE like you said, a classic web app simulating the super small quantum computer you created, but we arent going to use all of us at the same time your ACTUAL (again like you said) quantum computer, among other things because that quantum computer is not able to run as a web server with multiusers. Its very cool and usefull, yes, and its a neccesary marketing campaing, yes. Thats true. We could use your quant computer?, No, thats imposibble. You are talking to many coders, its not that easy to fool us xD.
ABAHEC (1 month ago)
*prosimian tryn' to talk about algebra, right?
Monkey Robots Inc. (1 month ago)
im puking,
John Purdy (1 month ago)
But can it run crysis
Quantum Pun OK, you had the fun experiment of figuring out the best way to implement Rock-Paper-Scissors on a quantum computer. My question is: does the Heat of the Meat REALLY equal the Angle of the Dangle? Potential Answer: it does when you're in a Superposition of Entanglement.
theAbhi- eYe (1 month ago)
love it
rajat sharma (1 month ago)
is this beginners video? Please stop misleading viewers.. I am not saying that speaker does not have knowledge . She has great understanding of this concept but this video is not at all meant for beginners. The way she was passing over each concept was really frustrating to watch. The title should be "prospects of quantum computing in solving complex problems ".
Oscar Chabrand (1 month ago)
fascinating stuff!
Neither Am I (1 month ago)
k!
Neither Am I (1 month ago)
right?
Alx Sblv (1 month ago)
What is this witchcraft....
Stuart Walsh (1 month ago)
It is not necessary to begin almost every sentence with "So" and end almost every sentence with "right?"
Dave Miasik (1 month ago)
I love (not) the way Dr. Gershon states that "This IS the way quantum computing IS going to solve this! So does this mean that QM scientists are going to provide an example that must have "this" state as its end result??? How can Dr. Gershon be so confident that QM ALREADY KNOWS the answer when by this presentation clearly Dr. Gershon does not have a clue??!!
Elfdogable (1 month ago)
Quantum computers are best at solving problems in the future (we hope). This is really about people having a good time. LOL. Please demo this quantum computer doing something that a classical computer cannot.
squidly2112 (1 month ago)
Like, you know, right? ... this is pretty cool .. I would be interested to know what problems they have actually solved using this.
Johnny Ennis (1 month ago)
this  might seem like a stupid question, but can entangled qubits have inverse relationships? Like if something happens to one qubit, can the inverse of that happen to the other entangled qubit? or is it even possible to tell?
Johnny Ennis (24 days ago)
Thanks! I'm very new to this and still trying to learn the appropriate wording and definitions. Thanks for teaching me how to think about qubits and the correlations in terms of systems and not just the qubit unit level. I appreciate your help!
Ambient Morality (24 days ago)
Yes, but it is worth noting that nothing can happen to 'one qubit' in an entangled system. If you do something to 'one qubit', you've actually applied an operator on the system as a whole. All entanglement means is that there is a correlation between the state of one qubit and another. That correlation can be direct (both have same state), a perfect anti-correlation (if one qubit is measured to have one state, the other must have a different state), or more subtle correlations between phases (which means you couldn't observe the entanglement by measuring a bunch of entangled qubits, but it would still be there and you could detect it by applying certain other gates and then measuring).
CBorgZ (1 month ago)
*What a crap? Quantum, computing is a fake like an AI!* *Superposition of 0 & 1? WHAT? It's just a hepatosis not proven in practice!* --- *Very butiful Dr* )))
Hak Ola (1 month ago)
can it play mp3
Anamnesia (1 month ago)
Round table seating facepalm! It would help to provide anthologies that made sense, otherwise you're not teaching anyone anything & you end up looking the fool.
James White (1 month ago)
I played Qbert!!!!
Seb S (1 month ago)
0:52 9! -- it's a circular table 3:44 2^63 -- if on the first day you get one grain, that's 2^0 through 2^63, not 2^1 2^64
Alex Eist (1 month ago)
only stupid or crazy believes that chaos can generate information. Quantum computer is only marketing method reach the money
Pól ó Cárthaigh (1 month ago)
i tried superposition with my wife once, and she broke her hip.
marvin19966 (1 month ago)
bored within 10 secs
CyberSinke (1 month ago)
No active Quantum Experience users in Turkmenistan!? I don't think so! VPN, hello?
Will Nitschke (1 month ago)
Can't doesn't mean slow.
Mike McManis (1 month ago)
Great speaker! Too bad my brain just can't grab on to anything quantumish. It only says, "What? Wait...WHAT??"
https://yt3.ggpht.com/-TCVwzICdWug/AAAAAAAAAAI/AAAAAAAAAAA/IlRdpOrmaxg/s48-c-k-no-mo-rj-c0xffffff/photo.jpg
Derek Duncan (1 month ago)
Need the link on your web site that is clickable not on the video....thank you.... Excellent video very informative so far the best video in regards to quantum computers on youtube.
binarybox (2 months ago)
Is there a limited range over which entanglement works or is it unlimited? Are most errors caused by trying to monitor the entanglement as this does affect the output?
The video thumbnail looks like a Salvia trip.
peganoske (2 months ago)
Step 1: Governments use quantum computers to hypercontrol over everything. Life looks like a hell of broiler-chicken life. Step 2: Governments compete about who ruined culture more and who make life of their citizens more hellish. AI has appeared. Step 3: AI kills all governments and human rulers. Humans' life improves - now they live in zoos and have free healthy meal regularly. Bonus: Some people come to be pets for AI, they have everything and anything including even stuff and entertainments that were banned or tabooed in pre-AI human societies. Well, all this lucky pets are castrated.
Stefan Mihai Stanescu (2 months ago)
1:32 except the factorial isn't an exponential
greg931 (2 months ago)
intro to superposition https://www.youtube.com/watch?v=lZ3bPUKo5zc Just as exciting
Satya Sarma (2 months ago)
Hey bitch(apologies for my language, but usage is to beat your arrogance), the story you say 3:04 to 3:58 is from India and is very famous in India since ancient times. Does that bother you to admit it? Also, what you call Chess has original name "Cahturangaचतुरंगा " means , four divisions of army, which copied over by Arabs as "Shatranj" and into Europe as "Chess".
Richard Cantin (2 months ago)
Awesome video!! It’s the future of computing. Imagine the AI applications. Exciting 🤖
N H (2 months ago)
I suddenly do not give a fuck.
Dino Hauska (2 months ago)
quantum comp.+ AI = BYE, BYE HUMANS....
The TNTBlower77 (2 months ago)
M is for quantum
Martin Pedersen (2 months ago)
The reason is that .. not because ..
Johnny Ramage (2 months ago)
8.04 Communication through Microwaves....5G anyone?
just read the comments and now I feel bad for not noticing the amount of times she says the word "right" and the static noise (even though I was using using headphones).
Ben Dawn (2 months ago)
I would tell this lady to never lecture again until she fixes her habit of saying "right" all the time.
Ian Rivlin (2 months ago)
She lost me after "Good day, ladies and gentlemen".
hatem amine (2 months ago)
ok now i know that i understand nothing in computer quantum
Phil Chia (2 months ago)
Everything you knew about math is now out of date.
Mikeyy12 C.Lennz (2 months ago)
It’s not static making that sound. It’s quantum physics. Ewowowoewoww~~~~~~
Kouros Mousavi (2 months ago)
who actually 'dislike's videos like these? who the fuck are you?
somebody301 (2 months ago)
Actually, I knew that the legend says the maker told the king to have 1 grain of rice per chess game played. it is above 10^10
Ivor Šlibar (2 months ago)
number of possible combination is not 10!..
Thatyou GoOn (2 months ago)
yea it is 9!, but hey, it is physics, so it is an reasonable order of magnitude approximation, just off by one xD
Falkor Moonchild (2 months ago)
The original source is a spied genius (abuse crime) who dictated he whole concept in this female voice before including the ibmqx2 concept. He is also the original polyphone voice composer of ~50.000 songs including those always hitting Chard's position no.1 and the master mind of much more like Hollywood's movies and who wonders: most relevant speeches. Result: hugest job creator, most relevant inventor. Here: just a nurd game to trigger personal toward IBM research. This acting b is paid, not so the author yet. #betterbehonest #revelation #espionage #slavery #fraud #alert #makeacurrycagreatagain 📡
thevancouverguy (1 month ago)
what are you smoking? your comment makes zero sense. who do you think this magic genius you speak of is
But will it run Star Citizen?
Mark Arnott (2 months ago)
HEY🐵 U didnt leave the link 🔗🖇🔗to the Quantum pc 💻 above WTF lazy nerds at work or not 🙊👉🙈👉💩🙋‍♀️
Mark Arnott (2 months ago)
CAN I program the quantum to put all the loose 👛 change in the world into my account?💹 🏧 💱 💳 💲 A-> 1c 😔 here & a 2 cents there👛 ei ei oh 🤪 making sense yet 100000000000000x100x10xmc2ents
Stems Rose (2 months ago)
Okay I gave this video a dislike because of the PragerU add that appeared before this video.
Laurens Bruijn (2 months ago)
at 4:0-5:0 where there should be a good explanation of superposition and how qubits differ from regular computations the speaker fails to illustrate any of these principle differences. The second half is a sales pitch on how cool IBM is. I had hoped to get a better insight into quantum computing but unfortunately not from this video. edit: I found this explanation by Prof Morello https://youtu.be/g_IaVepNDT4 To be exponentially better
doctortabby (2 months ago)
Excellent, Dr. Gershon. Thanks so much for sharing this excellent introductory video. It was so helpful. Thanks to you all for making this resource available. I plan to go in and (hopefully:-) ) have some fun with it. God bless.
Burger Birger (2 months ago)
Now i know, I'm stupid😁👍
Steve Phillips (3 months ago)
I see there is an app too now! This is exactly what I needed to help me understand. Thanks!
Gospel of Christ (3 months ago)
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RailFanning & Stuff (3 months ago)
the only use Quantum Computing has in my mind is transmitting Computer code over entangled particles across vast distance in real time
Kreesan Naicker (3 months ago)
But can it run crysis
Vishal Mishra (3 months ago)
What is the simplest quantum algorithm (combination of quantum gates) that solves a real-world-moderately-useful problem that is reasonably understandable by a median-smart ordinary software developer (not dumb and not genius with average classical computing knowledge) ?
Gr Gr (3 months ago)
Can you expllain how stargates work?
Gr Gr (3 months ago)
yes but all know this computers already exists but are hidden to the public the public have only access to the shit
Tony Zinno (3 months ago)
Got some shitty audio Interference too... junky, I wanted to hear this lecture too..
ebin jose (3 months ago)
How did you figure out about the 10 people can sit 3.6 million? 10 factorial?
Thatyou GoOn (2 months ago)
10 factorial means 10*9*8*...*2*1. it is because there are first 10 free seats, then 9, then 8.. etc so the possible choices decreases wit 1 until there are no places left.
Dzintars Klavins (3 months ago)
Hmmm 9.223372036854776e+18 rice grains... in months... :)
At 5m0s you show a 1-qubit vs a 5-qubit sphere. But, aren't there already UNCOUNTABLY INFINITELY many possible combinations of states |0> & |1> over the reals or complexes? t*|0>+(1-t)*|1> for any real t in the interval (0,1) is uncountably infinitely many. So, why are more qubits needed?
0m50s At her wedding? Is this material scientist a millionaire?
Classical computers are racist because they play only classical music, whereas quantum computers can play jazz! (jk!!)
Great
ONE TRUTH (3 months ago)
Outdated technology. LoL. As I have figured out how to utilize my own being to render all this quantum computing technology useless and 100% OBSOLETE. WHY DO SO MANY HUMANS KEEP FALLING FOR THIS USELESS CRAP. IT SERVES NO PURPOSE. HAHAHAHA. USE YOUR OWN MIND.BODY.SOUL. Waste of time.
Akash Kumar (3 months ago)
Wow...i want to meet this lady ...lot of discussion and queries