Quantum Computers Animated

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Quantum Computers Animated

Quantum Computers Animated

Well we use the word in reference to the laws
of physics that apply in the microscopic world at the level of individual atoms, individual
electrons, and elementary particles … where physics is qualitatively different than what
we experience in our everyday lives. Have you ever been to the beach and you see
waves coming in? Why do the waves have characteristic speed? That’s all classical physics. Send a rocket to the moon…. There’s no quantum
physics in that We’re discussing right now the quantum world,
which is at the very smallest scale… the elements of reality down at that level are
not described by what we’re used to… With the momentum of something… or the position… …if you were to go and ask the same questions
at the microscopic level, at the quantum level, then things break down So things are different there. And that’s a big part of why we’re interested
in this whole subject Can we take this quantumness of the microscopic
world and blow it up to larger and larger sizes… Manipulate them in a way which is highly controllable
to get them to do what we want them to do If you have a quantum system, that Quantum
computer can do things; can perform tasks that we couldn’t hope to perform with ordinary
digital computers. You can’t dream of doing it So when we think about how quantum information
is different from classical information now a days, we’re thinking about this intrinsic
randomness… the uncertainty principle… and also about entanglement- Classical information we can express in terms
of bits, you can take any amount of information and write it as a string of bits. And in the quantum case… we call them quantum
bits, or Q bits, and they’re different from ordinary bits in some fundamental ways. So a classical bit I can write a zero or a
one on the table and everybody can look at it the same way, but in a quantum bit there’s
more than one complimentary way to look at it. You can kind of picture it this way, you’ve
got a box and you can put an object in the box. In the quantum case there is more than one
way to open the box. And you’ve got to make a choice, If you open door number one, you’ll never
know what would have happened, it cannot be known, what would have happened if you had
opened door number two instead, those are incompatible things. That’s something really new, compared to classical
physics That’s what I mean when I say it’s really
intrinsic randomness. It’s not that there’s some record somewhere,
but you haven’t looked at it yet… There’s no record. It hasn’t been decided yet … whether it’s
going to be a zero or a one. It’s not until you make the observation and
open the door that it becomes the value of this bit, maybe it’s a zero, maybe it’s a
one. The randomness comes from the ability of quantum
states to be in a superposition…. to be both in the state of zero, of definite say
spin up for some like particle, and also a spin down state. What if they were not just numbers, they were
waves, then you can, like, put together two of these waves and you can think of having
half of a zero and half of a one, so whenever you measure it, you will end up getting half
of the time the zero and half of the time the one. So superposition is fundamental for that randomness. If I flip a coin, I don’t carry coins in my
pocket anymore or I’d flip one, I flip a coin and then I cover up the coin as soon as it
lands you don’t know whether it’s a heads or a tails, but it’s either a heads or a tails
we just don’t know yet, that’s not a superposition, that’s a probability distribution. But if we have the most complete description
of the system that is possible, compatible with quantum physics, like when I prepared
the state and when we open door number two we don’t know whether it was a zero or a one-
that’s superposition, because that’s really intrinsic randomness instead of probability
associated with ignorance. So, it takes two to tango in quantum entanglement… You cannot just have a single Qbit and say,
oh, it’s entangled. With what? So you need two q bits, at least. The reason these quantum correlations are
different than classical correlations is because we have these distinct incompatible ways of
observing the system. Classical systems can be correlated, we can
flip two coins and they’re either both heads or their both tails, no big deal, but there’s
just one way to look at that coin. Q bits are different, we have these two incompatible
ways of looking at them, they have two ways to be correlated, either the same or different
for two different sets of doors, those are all together four possibilities. And that
means the correlations are richer, they’re more interesting, and the richness of the
correlations increases very markedly as you increase the number of parts or add additional
q bits. You know, if you have just a few hundred q
bits and you want to write down a complete description of all those correlations among
those q bits in terms of classical bits, you’d have to write down more numbers than the number
of atoms in the visible universe. It’s one of these things like… I don’t know
if it was Faust that said it; that achieving perfection is, hard …, but remaining perfect,
that’s impossible. A lot of what we’re trying to do is create
things that are stable, because you can have the most exotic quantum state but unless you
can probe it, measure it, evolve it in some way that you want to steer it, it’s going
to be useless. There’s a central problem… And that is, if you’re running a quantum computation,
if you’re performing a sequence of operations, you know, processing the quantum state… That has to be very well concealed, not just
from you and from Spiros and from me but from the whole outside world. Classically there’d be nothing wrong with
looking at every time step what the state of the computer is… that wouldn’t prevent
the computer from getting the right but quantumly if we keep looking at the computer that will
‘destroy’ these delicate superpositions. It’s a secret computation, until the end when
we’re finally ready to get the result out, we make a measurement and then its okay to
tell everybody what the outcome is; to broadcast it to your friends. But we can’t be looking
at the computer while it’s performing the computation If we ask it afterwards, what did you just
do when you factored that huge number, it should say, “I don’t remember.” Because there
was no record left behind of what it was doing at intermediate stages of the computation. And this is what makes it so challenging.
Because we can’t allow any leakage of information, from the computer, to the surroundings, that
would destroy the quantum computer That’s what we call decoherence, it’s the
big enemy. There’s a whole quantum world out there which
is largely unexplored because it’s only now, within the last decade or so, that we are
developing the technological capabilities to scale up quantum systems to manipulate
them, and we’re not exactly sure what that’s going to lead to. But we think it’s exciting. And I do get excited!

100 thoughts on Quantum Computers Animated

  1. Am I the only person here that doesn't see how receiving the light that reflected off of the surface of the object I'm observing has any effect on its position?

  2. They've said "observed" plenty of times, but they haven't really defined what constitutes observing it. I know that sounds simple enough, but given the claims of how it reacts to being "observed", it opens the door to a wide range of interpretations of the word.

  3. i built a quantum computer and used it to email "happy birthday pal",……it sent the message 'eat my shorts' ahh…..dam that uncertainty principle!

  4. I have always wondered if QM is truly random or comes from vacuum interactions in a deterministic way that we just cannot measure. It seems from experiments on collapse propagation rates that states become defined when interactions occur with other objects with a defined state; two things in superposition can entangle, but one thing in superposition interacting with something not in superposition will collapse to a compatible state. If you cool something enough and shield it from interactions it goes back into a superposition – is this because it no longer has a "relationship" to the environment, or in other words any state in the superposition is now "compatible" with the rest of reality?

  5. When physicists are so sure of their knowledge that they don't realise what sounds explainable to them isn't to a non physicist.

    Kudos on the endeavour though.

  6. Hmmm let me explain this vid in 50 words. You are about to flip a coin, you pick heads, it lands on tails you are wrong. You flip a coin again, you pick tails, its land on tails. You are wrong. You flip a coin again, pick both heads and tails close your eyes, block your ears and go into a comer. You were right.

  7. I feel like I've observed a somewhat condescending attitude from those invested in quantum physics where classical physics is implicitly regarded as kid's stuff because it's inherently more simple and easy to understand. Even with our knowledge of classical physics today, it's still ridiculously difficult to develop and successfully launch a rocket without something going awry. Thermofluid analysis, mechanics, materials; it's a huge investment and slog to produce meaningful results to which we can benefit, and classical physics is worth every ounce of respect as well.

  8. Its too cold out for Angels to fly,

    mortified with ones regrets and disappointments simply amplify s your demise. Think not of what you should of done but how you shall do. Every morning you wake you, you wake up and you better stand up and gaze into the florescent passures of uncut grass broken pots and empty pools , you havnt cried for years but you know your dam will break you know you are a product of everything your mother and father have raised you tobe. have molded your veyr spirit and future existence all for the sacrifice of putting you before themselves. and now what? your going to slouch on your wheely chair and try to contemplate these words all the while relating and connecting to every letter you once again fail to rea….

  9. "If you can't explain it to a six year old, you don't understand it yourself". If the goal of this video was to repeat over and over what almost everyone know about Schrodinger cat, mission accomplished, if not, then Einstein wants to have a word with you.

  10. Its just Two Spherical Sine Wavefronts multiplying inward +1=0 now -1 dividing outward at right angles from their sources.. .  .And where the two positive and negative electromagnetic Spherical Sine Wavefronts meet, creates the particle effect.. .   .

  11. The entire notion that you cant LOOK at the computation because LOOKING at it would cause it to fall apart, MAKES ABSOLUTELY NO SENSE TO ME! :*( How could that POSSIBLY interfere with the computation!?! That sounds like absolute chaos to me, if not something supernatural. Ow my brain :*(

  12. First the renounce the flipping of a coin with the statment "that it's a matter of probability" and then they show that when you open the box(just as one move the hand away from the coin you can se whether it's head or tale", and when you open the box you can see whether it's Up og Down spin, the analogy between both seem pretty clear in my view as there is no difference. Another argument is that it can be both 1 and 0 at the same time, which is rediculess as this Means that time has to be stopped, and everyone knows it's not possible because without time there will be no movement. Take a coin and flip it iin the air and take af Picture while it's in the air and look at the Picture to see the time is stopped but you can't se both head and tale at the Picture at the same time. When it comes to entanglement the scientist don't renounce probability as being to simple anymore they use it instead to correct the result from the quantumcomputer and that only goes for situations where you know what the result should be, – so what about all the glorius thing this Wonder quantumcomputer can do but they don't know the result from the start, how will they corect this if it's wrong. I'm afraid we are having a classical example of people fantasises about this quantum computer. One time it's correct to use probability and the NeXT time it's not worth touching because it's to simple just with the coin, Either it's in the wastbasket or it's applyable – it's not to the scientist to decise this when it fits into there Funding likeliness.

  13. if reality has to make a choice of what to be by being observed does this mean reality is conscious? and if so then reality is god,or are we as conscious beings creating reality by the act of observing? i am not religious but it doesn't harm to ask questions like that in my opinion.

  14. Channelings say Jade Helm operation in USA was run by "Jade" a quantum computer that was "at the Helm" of the operation. It was the first test of a "military" operation run by this Quantum Computer, to see if it could be done. And Jade did it great. So there is already Quantum Computer and programmable, we only need to be able to change the world and make Top Secret and any kind of rigging of things illegal. But the problem is people just likes things are they are. The people likes there is Top Secrets and they like the few controlling the rest of us. So to have a quantum computer you "only" need to awaken people, when people wants no more secrets then you have the Quantum Computer coming public and science being done to enhance people's lives.

  15. The day these computers become widely available is when internet hell will break loose. That is because people's passwords would be much much much easier to crack and it will be a nightmare trying to secure things digitally. I know there will be many good uses but beware what the bad eggs of the internet might do.

  16. I am incredibly ignorant to this topic, only just started to study physics in college, but would quantum computing have any relevance to the speed at which we can process and analyze data? The video did reference how digital computers are simply inadequate for the level of computation quantum can achieve. I instantly thought of processing power at relativistic speeds, probably reflective of my own ignorance of the matter.

  17. 1:54 -by your statement it leads to a "woulda, shoulda, coulda scenario and IF that's the case here, then why do you HAVE to make a choice of just ONE door ? can't you strive to move PAST that choice and choose to open ALL the doors at the same time ? or is my thought a forgone conclusion …..I'm just throwing this thought out here Scientists have created a Quantum
    "Fredkin Gate" —–> http://www.rawstory.com/2016/03/scientists-successfully-create-a-quantum-fredkin-gate/ and
    1 step closer ……

  18. I truly wonder when quantum computers/computing will be possible, I'm gonna say in a decade or less…..even that will be possible way before 2050…..how advanced would quantum computers be by 2050?or what's after quantum computers

  19. people keep saying that quantum particles are in a superposition, a state of both up and down as its often said, but it seems to me that its a possibility that its just moving so quickly that when we measure it we catch it at one or the other randomly. not that its in both states at once but rather its just moving so fast in undetermined directions that we cant predict it. if it was, in reality, in both states at once then how could it be apart of the system of physics we understand? everything would be indecisive and unpredictable. wouldnt it?

    ive heard a lot of people talk about quantum physics so if you try to explain this to me please try in a different way than the usual. just a heads up so you dont get frustrated when i debate the subject further.

  20. I don't get how observing something destroys it…
    Time to Google stuff until my brain explodes.

    Also, did anyone realize the 1's and 0's form a face?
    And 42 😀

  21. scientist that were in Flight 370 were working on this quantom computer and allot of Money in stocks,shares were involved.

  22. btw i have a question about quantum computers. Scientists cannot explain 'the ''observation effect'' and the super position because these traits are not happening on the macro world.So how can we create something when we cant explain how and why it works?

  23. Then how are you supposed to do calculations or store data? The 01010001 that I stored yesterday night changed to a 0000000, depending on how I "opened the box". All the hype about quantum computers, talking about what they can and will be able to do, etc. without anyone talking about how they could possibly become practical, even for supercomputers.

  24. So if you take a test on quantum programing you might pass or you might fail , or you can tell your professor he changed your answers by looking at your test.

  25. so if you ask it a question and get an answer and it doesn't know how it came to that answer or has forgotten will you get a different answer to the same question every time you ask it or will it come to the same conclusion but work it out differently every time.

  26. Computers need to be logical,repetitive and self checking(parity checking). A quantum computer is inherently useless to us.

  27. Have these computers actually done anything? Figured out some brand new thing or some unsolved old problem? Cause it just sounds like a generator of randomness?

  28. Sounds like quantum computers are pretty useless for regular users.I thought quantum computers would replace regular PCs.In reality,it's this abstract thing that only scientists find appealing.

  29. How can a scientific say something it's random… It's beyond me… If we suspect there's a big bang… hey, at least keep that information in further experiments. We know it all comes from an explosion. Far far away, long long time ago, but from a place, a moment, a state. It's just a shame people still thinks randomness exists.

  30. Can anyone give me an example problem that is well suited for a quantum computer? If the solution to a problem is not deterministic (or at least an approximation), how can we take it as a good solution?

  31. we live on one plece on one time and we can only see this particular in thad one please even if they are in multiple places in thad time

  32. Is this mean a single quantum transistors is quad core? where a traditional transistor has only two possibilities 1 and 0 but quantum is "0 1 0 1"?

  33. The voices of the presenters alone will bore you out of your mind and not focus on learning anything. Plus their explanations suck. There, I said it.

  34. This video is interesting, and education, but seems a bit short on explaining just what is quantum computation. It does a great job showing some of the characteristics of quantum systems as compared to classical. But it's not clear from this, beyond vague generalizations, how qubits and quantum phenomena can be harnessed to do useful computational work. How, at least in principle, would we add 5+7? Or solve a quadratic equation? Or find a fish in a photograph?

  35. how are these quantium computers messing with are time line and the fabric of our reality? how does it pull information from other parrell universes?

  36. HAHAHA.
    There is no such thing as randomness in the universe.
    you may THINK, there are… but that is only because you can not see the whole picture.

    I do not get it why humans keep calling things.. "Oh, that is completely randomness, because if i can not understand it or see the path, then it clearly must be random".

    NOTHING, in the universe is random, just open your eyes and mind damn it.

  37. you are playing with fire, Quantum is evil, the worst part it can
    travel to time to fix his mistake, ( Just like Terminator Movie) When
    the first Quantum Computer functional you will have Quantum Robot with
    Quantum Brain that consciousness . That is the end of Human Kind

  38. This article makes a counter argument. Thoughts? https://edgylabs.com/unhackable-chinese-communication-network-soon/

  39. Was this supposed to be a simple explanation about how quantum computers work or was this video aimed at quantum physicists who already understand this stuff? Mere mortals like most of us would have a hard time making any sense of this video. What would be really nice is an explanation of how a quantum computer can add 2+2 and come up with 4 every time, even with all this 'randomness'.

  40. I think quantum physics is so difficult to even the best of the experts. They are just pretending to know it.

  41. How can we tell the difference between "probability distribution + ignorance"(like the coin) and "real intrinsic quantum randomness"?
    Isn't the idea of "intrinsic randomness" just a advanced form of ignorance?
    Maybe to show, that even god doesn't know the answer(seen at 02:07) is part of this new ignorance.

  42. Quantum computers are a great idea… and always will be. They'll never amount to anything; decades of trying prove it. We're no closer at all. These two undergraduates don't know shit.

  43. thanks for animating my thoughts i should be having while this dude whisper talks in my ear. what i ended up doing was just turning up the volume and scrolling down so i couldnt see the moving video.

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