Quantum Computing: Untangling the Hype

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Quantum technology has the potential to revolutionise whole fields of computing; from cryptography to molecular modelling. But how do quantum computers work?
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Join leading experts to untangle the quantum computing hype, at this event supported by the Embassy of the Kingdom of the Netherlands.
Artur Ekert works on information processing in quantum-mechanical systems. His invention of entanglement-based quantum cryptography in 1991 triggered an explosion of research efforts worldwide and continues to inspire new research directions. As well as showing that Bell’s inequalities can be used to test for eavesdropping, he has contributed to many important advances in the foundations and experimental realisations of quantum communication and computation. He has played a leading role in transforming quantum information science into a vibrant interdisciplinary field.
Harry Buhrman got his PhD in Computer Science from the University of Amsterdam. Buhrman built the quantum computing group at CWI, which was one of the first groups worldwide and the first in The Netherlands working on quantum information processing. Buhrman’s research focuses on quantum computing, algorithms, and complexity theory. He co-developed the area of quantum communication complexity (quantum distributed computing), and demonstrated for the first time that certain communication tasks can be solved (exponentially) more efficient with quantum resources. This showed that quantum computers can not only speed up computations, but also communication - which opened up a whole new application area of quantum information processing. Buhrman co-developed a general method to establish the limitations of quantum computers, and a framework for the study of quantum algorithms, which is now textbook material.
In 2001, Harry Buhrman became professor of algorithms, complexity theory, and quantum computing at the University of Amsterdam (UvA) and group leader of the Quantum Computing Group at the Center for Mathematics and Informatics (CWI). Buhrman co-founded QuSoft in 2015, a research center for quantum software, for which he is also co-director. During his career, Buhrman obtained various prestigious awards. Buhrman also has a leading role in the national Quantum Software Consortium that was awarded an NWO Gravity grant in 2017.”
The event is chaired by award-winning science writer Philip Ball, whose latest book is entitled 'Beyond Weird: Why Everything You Thought You Knew About Quantum Physics Is Different.'
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1 май 2018

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Комментарии : 489

@akhilsankar 5 лет назад

Ladies and gentlemen I appreciate your focus to 26:40, the place where the whole essence of the talk reveals before us. And you are welcome.

@laithmohamad2215 2 года назад

ككمممممنننت ت 8نننظظنننططكخ ه اللببييدييييرىىىرييييدييسييييرييييييييسييبيييقيققققق ف ب ف فف4444ف4ف4444ففففقف444فف44 4

@laithmohamad2215 2 года назад

جكججج0

@laithmohamad2215 2 года назад

وا او ز جحا اه ههههههههههه له 5 غ غغ

@laithmohamad2215 2 года назад

نط ظ ز ز.طططططططط

@akhilsankar 2 года назад

@@laithmohamad2215 what jibrish is this dear?

@aaronh920 6 лет назад

Video starts at 4:54

@johnemory7485 6 лет назад

thank you

@crpf 6 лет назад

mvp

@evolvingyang 5 лет назад

and ends at 3 minutes...it's a paradox

@chrisbkirov 5 лет назад

no, at 11:49.

@CandidDate 5 лет назад

There will be a time when every computer is a quantum computer. What comes after that, I wonder?

@toddpeterson5904 6 лет назад

Artur Ekert part of lecture starts at 11:45 Harry Buhrman part starts at 59:50

@erikdenhouter 3 года назад

You order a quantum computer, and a big black box arrives with "Quantum computer" written on the side. You open the box and there's nothing inside. You call the seller, and complain, but he reacts unexpected: "That's possible sir, that's the nature of the thing".

@tachodx7990 Год назад

Something has written on the side of the box . That's mean someone has measured it. So it should be existing. ;)

@isaackitone Год назад

By you opening it, you made it appear at Andromeda earth, 2 million light years away. That's why your box was empty.

@dalladi Год назад

So, Amazon, then.

@eustab.anas-mann9510 Год назад

@@isaackitone Good thing that's next door in our local group.

@marktrader490 Год назад

We're sorry, sir. It appears we accidentally shipped you a cat.

@timsmith6675 6 лет назад

I love The Royal Institution! Such great lecturers and topics for us science enthusiasts.

@shivammalhotra4823 3 года назад

Arthur’s talk was very sincere, he took the challenging path of describing the essence of quantum computing, not just fluff. I also didn’t get everything but understood the quantum interference and how classical probability breaks down.

@TheDavidlloydjones 2 года назад

Two speakers. Arthur Ekert at 11:42. Harry Buhrman is at 59:42.

@anonymous.youtuber 4 года назад

59:40 LED lights actually do get warm. The last laugh is on Arthur 🙋‍♀️

@clevelandmilton8942 3 года назад

@D4leBryant Год назад

Yep, I just made the same comment with data. Staring at room temp of 79F reached a max of 130F in just a few minutes. Then Mr. Bryant just had to scroll to confirm his hunch that he wasn't the first person to point this out. They neglected scrolling further to see weather or not they may have been the third person to point this out. Lol See what I did there?

@ridgequinn9435 5 лет назад

I appreciate the speakers time here, and I'm sure they're extremely knowledgeable.. however I think they were having difficulty dumbing it down for the rest of us. I am pretty interested in quantum mechanics so I could follow along somewhat, but it was difficult even for me to gather what they were trying to portray at certain points. That being said you don't have to be a brilliant speaker to be a brilliant person and I'm glad they're at least trying to help the rest of us catch up to all their hard work and dedication.

@just1john 4 года назад

or they have knowledge of a biased kind, one which must quantify (as oppose to qualify) everything and everyone. (Can we say cha-chin? BANK on it.) They do not (yet) know field modality which involves non-linear retroductive logic. (Yeah it's a word, but one of many hidden from us to keep us in line with quantity-based reasoning, on mass & weight, which ulteriorly upholds a continued dependence on being treated as such. A grand and unbiased (un-institutional) source to learn from, YT Theoria Apophasis with keywords Field Theory, Gravity, Magnetism, Dielectricity, Charles Proteus Steinmetz, Henri Poincaré, Nikola Tesla. And avoid all mainstreamlined cult-of-personalities for this. (For everything, really.)

@WRATHUSA 4 года назад

Those who can't, teach... Right..?lol

@MugenTJ 3 года назад

Just like some professors I had in college: I either stayed home or fall asleep in class. Super boring and incoherent at times. They don’t try to transfer the knowledge, just spilling the content of their brain or certain book.

@JoJoUK2000 Год назад

I couldn't agree more. This has to be the worst Royal Institution production I've ever seen ~ and I've watched a few. I thought the purpose of the RI was to make science accessible to the masses. This abysmal offering was about as accessible as a tightrope to a paraplegic! If the front entrance of the RI is as accessible as this lecture you'd have to be a rock climber just to get in the front door! Sorry guys but RI clearly has a different meaning now . . . Recondite Institution . . . do buck up your ideas!

@phonsefagan3754 4 года назад

It would have been nice if one of the speakers explained how quantum computers work. For example: How do you create and maintain the entanglement of so many electrons? How do you input your data or query? How do you get the output from the computation? Can these processes not be explained in broad strokes?

@jackhung6929 2 года назад

I could not agree more. This talk is the opposite of satisfying. It like watching someone stumble about. You pray for deliverance, for some kernel of valuable information to be revealed, and you get nothing. There is no advancement in understanding.

@S.G.Wallner 2 года назад

Completely agree, and this is exactly what I expected. I'm tired of every presentation start with history and the same uninteresting thought experiments. All speculation which never addresses the real deep questions and problems.

@josidasilva5515 4 года назад

Q bits are first placed into a steady state by reducing its movement (temperature), then they are excited by frequencies and may result in a more positive or more negative output (zero or one) or vibrate between the two stages, which we consider to be simultaneously a zero and a one. Each frequency may result in a unique output which leaves us with a wide vocabulary (instead of zero, one or the combination of zeros and ones); this rich language makes the communication speed as rich as the number of q bits you can combine. The interference can be caused by solar radiation or possibly human thought.

@sreeprakashneelakantan5051 4 года назад

One of the best talks, thanks for sharing this

@RoGeorgeRoGeorge 6 лет назад

@Harry Buhrman: 59:39 LED lights do get worm, too, just not as much as the incandescent ones. To keep the LEDs from melting, they are mounted on a heat radiator.

@kennethflorek8532 5 лет назад

I know it was only a joke, so it doesn't matter, but it is surprising that a technical person is blithely unaware that LEDs do get warm. The best information I could find leads to the conclusion that old incandescent lights turn about 3% of the energy into visible light (lumens) and the LED version about 14%.

@AlexanderBukh 4 года назад

48:00 where is this interesting picture from, please? can't find it online (i even bing-ed it, to no avail)

@christineliang4670 2 года назад

I like the part Artur explained how proof is a physical process rather abstract process. The 3-light-bulb problem. @58:00 when we made it, we proved it !! :P

@bostonjohnny1410 Год назад

TODAY'S LUNATIC MAYBE TOMORROW'S THEORETICAL PHYSICIST AND VICE-VERSA!😁

@bostonjohnny1410 Год назад

PERHAPS ALL THEORETICAL PHYSICIST ARE SCHROEDINGER CATS!!!😁

@hg1007 4 года назад

Great presentations. I got finally a better understanding of QC.

@D4leBryant Год назад

Actually the LED light bulbs offered as the new standard to replace incandescent bulbs do still dissipate some of their consumed energy as heat. I grabbed my non-contact temperature gun and pointed it at the bulb in my lamp which was at ambient room temperature of 79 degrees F. When I turned it on, it immediately began to increase in temperature at a constant rate reaching a maximum 130 degrees F in just a few minutes. So technically as long as the rooms are not too distant from one another the engineers solution is still valid.

@joshyoung1440 Год назад

All temperature guns are non-contact lol that's what makes it a gun

@GuniMatthiasson 6 лет назад

Thank you for making a really complicated concept almost understandable. I think the beamsplitter examples explain the difference between quantum and classical probabilities neatly.

@dancoulson6579 6 лет назад

Can anyone go to these lectures? Or are they only for certain people? Looks like it would be an interesting day out.

@TheRoyalInstitution 6 лет назад

Everyone's welcome! www.rigb.org/whats-on

@grandpaobvious 6 лет назад

George Spencer-Brown devised a "square-root of not" circuit in the 1950s that used an "imaginary" logic value that resembles a two-phase clock signal.

@jeffmorris9893 2 года назад

Once they figured out the slide projection misbehaviors, the presenters relaxed and ended up giving a smashing good program. Well done.

@Tagurrit 2 года назад

Agreed. Once relaxed things moved along well.

@netional5154 5 лет назад

Great talk, thanks! Lots of examples to get a feel for the field. I liked the engineer and light bulbs example as an analog how to make use of the physical processes rather than just the mathematical abstraction.

@matthewapps3465 2 года назад

(

@-_Nuke_- 6 лет назад

Let me clear out this "imaginary" number part. A lot of people might not know it; But there are what we call "imaginary" numbers that have a weird twist where something squared can give you a negative number (or you can have a square root of a negative number). That is why they are called like that, but remember the name "imaginary" was coined back in the early days of mathematicians struggling to understand them. Today and after Riemann, we know that there is nothing spooky or imaginary or weird, a root of a negative number. The square root of a negative number, is the *natural extension* of the root function when we talk about numbers that live outside the x'x axes (the axis of the real numbers) and "live" on an axis at right angles with the axis of the real numbers. Basically imaginary numbers, are just numbers that have one more sign to indicate their position on a 2D plane. Like real numbers have signs ( + - ) to indicate their positions on the 1D axes of the real numbers. - for left + for right. Imaginary numbers "live" on a zz axis that is at right angles with the x axis and meet the xx axis on the number zero. So here If they are above the xx axis we have the sign +i And if the are below the xx axis we have the sign -i For example the number 5i is 5 units above zero on the zz axis. And using these ideas we can prove (not so easy but possible) that sqrt(-1) = ±i where " i " is just another number like 1, 2 and 3... All numbers are just symbols anyway right; And following that we can prove the i^2 = -1 It might not make sense but we can prove it so it does. Like negative times a negative is a positive, here i^2 equals a negative, but remember i is not a positive number, neither it is a negative ;) So there's nothing spooky about it, don't let that confuse you.

@haulin 6 лет назад

Great explanation. The 2D plane picture helps a lot. So are there numbers that we need to describe in a third dimension?

@-_Nuke_- 6 лет назад

Actually complex numbers are making up the 2D plane. Imaginary numbers are only making up the 2nd axis... Complex numbers fill up the entire 2D plane... They are a combination of real numbers plus or minus an imaginary number. For example z=5+4i ... 5 is the "real" part (well basically numbers on the x axis) and 4i is the "imaginary" part (well basically numbers on the z axis). Beyond that we have the Quaternions ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3BR8tK-LuB0.html that I know very little about And beyond that god only knows :D

@jycapuras 6 лет назад

Thank you for this clarification... it is most elucidating!!! The geometric description illuminates it... BRAVO NUKE!

@-_Nuke_- 6 лет назад

You are very welcome Jose!

@barefootalien 6 лет назад

For really top-tier graphical representations of mathematical concepts that are traditionally considered difficult to visualize, check out 3 Blue 1 Brown.

@troglokev 5 лет назад

How do you do I/O, in view of the principle of indeterminacy?

@curtiscorrigal3356 2 года назад

Look it is infinity...unlimited discrimination~😆😱😉😂😎

6 месяцев назад

As long as you're willing to break the assumptions in the lamp puzzle, you don't even need LEDs, there are hundreds of methods: · Send two people, one in each room, then shout. (the car mechanic solution) · Place a mirror into the hallway. · Make a hole in the wall. · Use a conduction tester to map out the wires from each room and then combine the two maps. · If the lamps produce any amount of light, use an infrared camera. (diffuse, but interferometry can remove the wall from the data) · Bribe or threaten the puzzle creator so that they tell you the solution. · Spend a few years developing a super advanced telescope, point it at an exoplanet and watch the reflected light from Earth to see the setup process in "real time". Or just make a time machine at this point…

@christineliang4670 2 года назад

I also like @48:06, that nature figured it out how to use quantum interference, that the bacteria knew how to grab a hard-to-find photon and channel to its chemical reaction center, interesting!

@SicilianDefence 6 лет назад

Cool and thanks for this topics. Do talk more about Qbit and its operators.

@phillipalexandercarr1462 3 года назад

I suggested to China quantum project recently reported on by CGTN did the calculation show any organised vibration like chaos theory in the computers method of calculating and build it's own algorithm in any vibratory patterns...?

@hugo3222 4 года назад

I have a question at 7:25. The two images are obviously used to document some kind of progress. But which progress? The progress in technical engineering achieved by the R&D department? Or the progress in social engineering achieved by the HR and PR departments?

@violetmoon4236 4 года назад

These images present stage of progress in classical computers and Quantum Computers, according to the presenter. QCs are now in a very early stage, and could be compared to the early stage of classical computers.

@hainish2381 4 года назад

Using photons, Is is possible to generate, with quantum physics, 2 sets of entangled random numbers?

@prajnadattameher6210 6 лет назад

a tear on my eye around 13:50

@urielpelaezcdmx 4 года назад

I liked a lot the info in the slides. 👍

@anonymous.youtuber 3 года назад

So did I, it seems to me the slides are more effective than his speech in conveying information. It must be hard for a genius to explain something to a lay person. Nevertheless, he enhanced my very basic understanding of the topic.

@njgjhrjd 4 года назад

Notice how at 1:07:22 Harry Buhrman’s quantum random number generator is in superposition of being inside the bag and being somewhere else. Mr. Buhrman proceeds to conduct an experiment, but never tells the outcome. This bit of quantum information is now forever gone :)

@SamanthaP_123 Год назад

Seems as though the next step is a mathematical harmonic to be found which increases probability greatly.

@rohitchat5538 2 года назад

So practical quatam computing hardware and software so thank you very much to you all to explain about ❤️ 🙏❤️quantum comuters

@HelsinkiFINketeli_berlin_com 2 года назад

Any good video on quantum hacking and cracking? And quantum firewalls and such?

@eugenbarbula9661 5 лет назад

"I don't really feel like a prophet to be able..." you are a very modest man, this was the best talk I've heard so far about quantum computing. I hope to hear more of you.

@ashoknaganur8551 Год назад

Came to know about the importance and need of quantum computing

@timsmith5339 5 месяцев назад

I definitely understand this subject a little more now, but am still a long way from properly getting it. One thing that came out of this, is that it seems that no problems have yet been solved by a quantum computer. If this is correct, what is the nature of study on quantum computers at the moment? Also, when do we think a real solution to a problem will be output by a quantum computer?

@TheBinary0101 5 лет назад

I love the fact that it's NOT sponsored by Squarespace; or @t; or Audible; or World of Tanks, etc.

@TheRoyalInstitution 5 лет назад

Thank you, we're a small independent charity, and we'd like to stay that way! We do rely heavily on our members and patrons for this, so if you are able to, we would greatly appreciate your support on Patreon - www.patreon.com/TheRoyalInstitution

@russg1801 5 лет назад

Quantum Computer: Your electric bill might be $2, or $2 Million. Due to the Uncertainty Principle, we don't know!"

@jonathankovacs1809 4 года назад

Reminds me of one of my college professors a brilliant person but you really had to pay attention to have any hope of passing the class.

@philard 4 года назад

My professors were all better teachers then this.

@bailahie4235 4 года назад

Always good to hear a Dutch English accent (the introductory congenial lady), funny that it feels so strongly "at home" for me. (I'm Dutch as well.) Ok, back to business - now I'm going to start listening the lecture. ;-)

@Gribbo9999 2 года назад

1:03:00 in the other version of this picture Schrödinger is missing.

@SamVekemans 6 лет назад

I love talks like these, it helps me sleep :)

@TheRoyalInstitution 6 лет назад

Different strokes for different folks. We're glad to be there for you.

@geraldbeene8343 5 лет назад

@ashwanikumar6008 6 лет назад

Amazing content Loved it 😊

@MeltedPing 6 лет назад

Thanks great lecture!

@SchoolScienceProjects 2 года назад

I like looking down my You-Tube while listening to this.

@WinrichNaujoks 4 года назад

I think I'm more confused now than I was before.

@shafayat1676 2 года назад

4:45 start 2016 IBM made QC that is 5Q-bit 6:11 IBM Q Experience 8:13 richard fineman first introduced QC

@rohitchat5538 2 года назад

Ok I will learn theory description in the video ❤️🙏 today itself is my preference to understand so ❤️🙏

@stevekessell9255 Год назад

What was the date of this talk??? 2018?

@chrisbkirov 5 лет назад

51:18 The Hitchhiker's Guide reference :)

@StorytellerStudios 4 года назад

The first speaker lost me at "Hello". Explaining probability math and the way quantum physics (interference) changes classical equations (and experiments) is incredibly difficult. I don't speak the language, thus it is like listening to an explanation of a potential solution to a complex problem (which nobody fully understands) spoken in Russian. The example at 44:07 made the most sense to my limited intellect. Nonetheless, this channel, The Royal Institute is AMAZING and reflects the best of the internet!

@schweizerd6303 5 лет назад

He is like one of my uni lecturers (Im sure there are many more out there) that mumbles on and on and the entire class is puzzled, then comes the exam and the entire class fails and he wonders why. However I have no doubt he is a genious but has no creative teaching skills.

@rustycherkas8229 2 года назад

Only a genius would fail to recognise there are two monitors 'buried' in the audience that render exactly the same graphic being shown on the big monitor he cranes his neck to see...

@peterwan9076 Год назад

Ekert is a very bad in presenting his material. For those who barely understand the subject and manages his work would have difficulties in explaining the concept to laymen. This is true in the cutting-edge research. For example, Einstein would not be a good teacher in relativity until Hermann Minkowski came along to put the concept of spacetime in a 4D perspective. But of course, I am not comparing Ekert to Einstein. You know what I mean.

@rohitchat5538 2 года назад

So understand your calling ❤️🙏

@nofearnodoubtnodisbelief5950 5 лет назад

That's what I love about our reality. Someone comes up with an idea of how things should be then someone else makes it happen

@naarvmaan 3 года назад

Someone Poor and intelligent often got these ideas. And someone rich with opportunities made it happen. As far as history is concern.

@takster050974 3 года назад

True whatever we come up with, lots af those ideas will work overtime. I always wonder about that.

@hamspam7647 2 года назад

Great video. Very informative

@TechNed 6 лет назад

Back in the '70s when having to confront AC calculations for the first time, it was 'i'. I've often wondered why it later became 'j'. Now I know! The only thing I really thought I knew about quantum computing was, that by taking every path to a solution, previously time-consuming calculations can be performed quickly. These presentations have expanded my awareness so thanks for the great upload.

@MrAlpacabreeder 2 года назад

It became j when electrical and electronics engineers needed to use complex equations and already used i for electrical current

@TechNed 2 года назад

@@MrAlpacabreeder thanks. Somehow, we used 'i' for both and they never became confused because of the context in which they appeared, but what you say makes complete sense. We used 'i' for AC components, loop currents during analyses and also for instantaneous currents. 'I' was generally, though not always exclusively reserved for DC current.

@thegoodkidboy7726 6 лет назад

How many qubits can a Q Experience user access now? I know Rigetti's upgraded access allows up to 19.

@kylorenkardashian79 3 года назад

@thegoodkidboy7726 3 года назад

@@kylorenkardashian79 oh wow thanks

@nschulz5698 6 лет назад

Interesting talk but you have to stick with it. A good supplement to other quantum discussions.

@JohnGilbertmoore 6 лет назад

Damn. Him explaining that *Green Sulfur Bacterium* uses *Quantum Computing* is mind blowing.

@ztoob8898 5 лет назад

I always thought the "IBM Q Experience" involved John de Lancie putting you on trial for the crimes of Humanity, or something.

@debasishraychawdhuri 2 года назад

One thing though, LED lights do get warm, not as warm, but they do get warm.

@CompetitionChris 2 года назад

That's true. My LED flashlight is super bright and it gets pretty warm.

@zholud 3 года назад

Kolmogorov axiom IS right. It is the assumption that the path are mutually exclusive that is wrong. Or something else in the perception of reality is wrong. Axioms are right by definition.

@axelcarre8939 3 года назад

Why so many downvotes? This is the very first "almost-in-depth" video I'm given a chance to watch tbh

@mikeg4972 5 лет назад

I need "Quantum computing for dummies"

@chriskiel765 2 года назад

have you ever walked into a lecture and 30 minutes later realised you are not in the right room. My brain wasnt ready nor able to compute. The LED light joke made me feel normal. Thank you. for the intensity.

@TheNefari 5 лет назад

The biggest question will be: Will it run Crisis? On a serious note why did he not show how to link the photons? 1:11:00 That would have been the most interesting thing here, the other stuff was boring meaning either to high or low to make sense to a "normal person"

@badrbellaj1212 4 года назад

excellent

@WandaDeeBackroads 6 лет назад

He is talking about what is on the screen behind him but you only show me a glimpse of the screen. I need to be able to read the content as he is talking about it, not just watch him wave his hands around.

@RWBHere 5 лет назад

Pause the video.

@keefebaby 5 лет назад

It’s very interesting the way they keep trying to compare the old fashioned classical computers with the new quantum computers, there is a very big difference you didn’t actually need those computers to run the software you could do it all with pencil and paper if you wanted to, be very slow but can be done,but the problem with quantum computers is they don’t know how to program them even if they could afford a pencil and paper

@SandroAerogen 3 года назад

4:50 - The thing actually starts.

@shafayat1676 2 года назад

Tnx bro

@pethameno 5 лет назад

Amazing

@Jimoshi1 4 года назад

Sadly conditions you need to acheave for this to work is just too harsh for it to be common commersial product. BUT i think that a centers and cloud technologies with this would be amasing.

@SnowiDragon 4 года назад

Huh. I'm so lost lol So we will be using questions derived from laws and mathematical formulae we currently believe correct, which are initially derived from observation and theory, written and tested on the original base type of computer as well as we were able (traditional CPU). We then ask a higher level system we invented, that we have to trust we asked precisely correctly, to find the optimal answer? Didn't think there was a way to invent scientific faith but here we are. Amazing

@MadDragon75 5 лет назад

The Angle particle: when mater and antimatter coexist.

@scmacsart 5 лет назад

A computer that can and will do whatever the hell it wants. There is your killer AI right there.

@jimdocherty3454 2 года назад

A great introduction to the wonderful Quantum Computer, but as usual, we can't get the slideshow to work smoothly, wtf

@scottfullner9939 6 лет назад

And what was the hype and how did you untangle it? Hmmm... would have appreciated more sticking to the point and more clarity in answers to your thesis statement.

@thehappyatheist1931 5 лет назад

I love quantum theory but my head hurts to understand it. Anyone who has the guts to explain it is a good person by my vote.

@manloeste5555 2 года назад

There are many concepts that can facilitate intuitive understanding. Mentioned in talks here on the RI yt channel and I also like to watch the (german) videos of Gaßner, Lesch and Ganteför. The more different perspectives you get to know, the better you can get your own picture of this initially less intuitive topic.

@phcjs 6 лет назад

Great!

@JustFamilyPlaytime 4 года назад

Is a sum of histories actually a probability sum?

@percih70 6 лет назад

no Q&A?

@funkengruven7773 6 лет назад

A wonderful topic with poor execution. Wish you would do this one again with speakers that can express their thoughts clearly and in a semi-organized manner... Should label this video "Quantum Computing: Tangling the Hype"...

@jakeroosenbloom 6 лет назад

Great lecture

@SC-bg8wf 2 года назад

The level of the talk was far above the lay person level. The speaker started with very simple and immediately jumped to much more difficult. He sounded like he was talking to other physicists that need to learn about quantum computation.

@danielkyalo8266 2 года назад

There are better videos on quantum computing done by smart people. The idiots here don't understand quantum computing.

@jakeoconnor6998 3 года назад

quantum physics is abstract to the level where one needs to tear themselves away from all interferences (generally referred to as "reality") to have a hope of understanding a single qubit. It takes an especially talented person to be able to translate their understanding of how something works (in terms of the fundamental workings of the universe) in a manner that is succinct, fluent and coherent. All that said, he still struggles at the most difficult question; the one that has plagued humankind for at least as long as I remember: "can I go back (to the previous PPT slide)?" Personally, I've been conditioned to hit the reset button and confuse people with drawings on the blackboard. We can add "patient" to the list of this man's attributes.

@ralphbalzac685 Год назад

Thanks!

@TheRoyalInstitution Год назад

Thank you!

@AliHSyed 6 лет назад

Someone buy both these men a pint!

@Thomas_Geist 4 года назад

I'm a fairly clever guy. Very high IQ and a communications engineer. Also taken a lot of computer science classes and at one time could program in 3 languages. The double slit experiment has always fascinated me and I'm sufficiently knowledgable to know something about epistemology and logic. Okay... Listening to this I felt like the child that noticed the King had no close on. Children should not have been allowed in the audience for fear of nightmares. What a complete waste of my time. "Incoherence theory?" Sounds like the entire thing is incoherent. When they can tell me whether to put my chips on black or red and win more than 50% of the time I'll be impressed; and the boys at Las Vegas will put out hits on these guys so we'll be back where we started.

@danielbrown9393 6 лет назад

Best lecture I've ever watched on quantum basics.

@JoeSolla 3 года назад

I was interested, but could not make out what the speaker was saying. Plonk

@rohitchat5538 2 года назад

So is so really 🙏❤️

@Pianoscript 4 года назад

There is no spooky action at a distance: entangled photons simply alternate their spins synchroniously and opposite each other since this is how they were formed: The Garon Principle states that entangled photons must from the get go, be of opposite magnetic fields and of opposite phase( simply put, mirror images of each other). During entanglement, their angular momenta are simply coupled and so the photons do not oscillate but rotate in unison. The moment of de-entanglement simply sets the spins depending on which part of the oscillation the photons are on at the time (remember opposite phase of each other) and which direction of rotation they are set off on ( one will rotate left, the other right 100% of the time). And that's the truth!

@manloeste5555 2 года назад

But important to add that no hidden information is the reason for their entangled behaviour.

@iwersonsch5131 3 года назад

1:06 So Aphelios was designed by The Royal Institution all along!

@hybmnzz2658 3 года назад

bruh

@venkatbabu186 5 лет назад

When parallel lines meet by small disturbance they create warp drive.

@karagi101 4 года назад

Venkat Babu If they meet then they’re not parallel.

@sent4dc 6 лет назад

Sorry, but it's a very nebulous lecture. 1:18:50 is where it kinda touches the question in the title, but is still far from "untangling" anything. I'd say that it brings even more "hype" to quantum computing. I'm a software developer and I still don't see how having those q-bits in a superposition can help us create logical gates, or do any kind of "computing." All those q-bits that they reference sound nothing more than a good random number generator, or a data storage, at best. It would really help RI, if you invited someone who knows well and does programming of "classical" computers, who can then show how that can be translated into this "hypothetical" field of quantum computing. So far I haven't found a single lecture like that! All that I see is a click bait or a marketing ploy that basically extrapolates previous exponential development of computers into the future. Sorry to break it to you, but it doesn't always work like that. It took us over 200 thousand years to put a rock on the stick to make an ax.

@MrAlRats 6 лет назад

An excellent starting point with a far superior explanation can be found in the first and third chapters of 'The Feynman lectures on Physics', Vol iii. www.feynmanlectures.caltech.edu/III_01.html www.feynmanlectures.caltech.edu/III_03.html Once you have read and thoroughly understood the ideas presented here; then read the book 'Quantum Computer science: An introduction' by David Mermin. www.amazon.co.uk/Quantum-Computer-Science-David-Mermin/dp/0521876583

@meepk633 5 лет назад

That's fair, but describing a completely different architecture wouldn't really be appropriate for these lectures. And you're wrong about the promise of quantum computing. That's understandable as you obviously don't understand how they work. Skepticism is good if you aren't too lazy to put in the most minor amounts of research.

@selfdroid 5 лет назад

I agree. I know it is old comment, but (if by any chance you didn't find it already) this is the lecture to watch -> ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-F_Riqjdh2oM.html

@RayLNelson 2 года назад

Sorry, this does not untangle Hype, it simply confuses. How do you program in qbits?

@schmetterling4477 2 года назад

Nobody knows. That's the fun part and probably one of the Achilles' heels of quantum computing. I have a hunch that converting a classical problem into a quantum program will turn out to be just as hard, if not harder, in general, as solving the problem.