Quantum Computers Explained - Limits of Human Technology

  • Published on Dec 8, 2015
  • Where are the limits of human technology? And can we somehow avoid them? This is where quantum computers become very interesting.
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    Quantum Computers Explained - Limits of Human Technology
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Comments • 13 007

  • USS Voyager
    USS Voyager 21 hour ago

    Wo finde ich die Deutsche Version?

  • Overproud Indonesian Production

    But,can it run S.T.A.L.K.E.R.?

  • NATmusic
    NATmusic Day ago

    All of this is very very interesting but I'm feeling like I'm getting lost behind... from where should I start studying to understand something more of this? Physics? Math? All?

  • Ryan_cool_gamer
    Ryan_cool_gamer Day ago

    My brain just exploded

  • utoobwa
    utoobwa 2 days ago

    Is there something in English available?

  • Gopal Smart
    Gopal Smart 2 days ago

    Science never fails, and lies. Our brain and mind needs high tech in every field. AUSTRALIAN ACADEMY OF SCIENCE GIVE LOT OF SCIENCE INFORMATION. I WELCOME MORE VIDEOS PL. GOPAL ARTIST. SOUTH INDIA, PIN 641014

  • Nizzloid
    Nizzloid 2 days ago

    Can it run tetris on 60 fps

  • Druvis Eglite
    Druvis Eglite 2 days ago

    4:44 Dial the Stargate.

  • Israel Vidana
    Israel Vidana 3 days ago

    I want a quantum smartphone

  • Emperor Galaxian
    Emperor Galaxian 3 days ago

    2018 and I have a *HUGE* question about Quantum Computers:
    Can it Run DOOM?

  • Samuel Carvajal
    Samuel Carvajal 3 days ago

    0:08 its the duck from DHMIS

  • intanwulans
    intanwulans 3 days ago

    Limit of the technology?

  • MJ Ozog
    MJ Ozog 3 days ago

    Error 404: person.exe was not found

  • Denny 200
    Denny 200 4 days ago

    Man, was soll das? Videos mit deutschen Titeln sind auf englisch und Videos mit englischen Titeln sind auf deutsch. Nicht dass ich's nicht genau so gut verstehen würde, aber das ist halt nervig.

  • BaneDonegan BadDay
    BaneDonegan BadDay 4 days ago

    can it run crysis tho

  • Eduardo Sanchez
    Eduardo Sanchez 4 days ago

    Ok, so quantum computers have weird bits...

    But I can use a virtual machine on my PC and click on that "Free Taco Bell Samples!" link

  • Old Bird
    Old Bird 4 days ago +1

    Lol so that's why theydont really exist yet! They're not really reliable!

  • Saphire Ninja
    Saphire Ninja 5 days ago

    Nerd.exe has stopped working

  • Saphire Ninja
    Saphire Ninja 5 days ago

    But can it run Crisis?

  • The TinyTardis
    The TinyTardis 5 days ago

    Could you please do a video on quantum tunneling and/or a video on quantum mechanics?
    I understand that there very complicated so i understand why you wouldn't

  • Jezrel Carvellida
    Jezrel Carvellida 5 days ago

    How Familiar are you with the Gears Wars?
    Is this a Rick and Morty reference? :D

  • Rajinder Singh
    Rajinder Singh 5 days ago +1

    I haven't learned a thing!! (For some of you.. this is a Rick and Morty reference)

  • darklinkx8
    darklinkx8 5 days ago

    TIL seven year olds are the smartest beings in the universe.

  • E C
    E C 6 days ago

    Simple glass of water will hold enough data for an entire World Super Computer. The study of written and spoken crystalluzation of data stored water is almost a reality. The mechanism of time bent and behavior of sub-atomic particles in quantum will be the paradigm shift in computing technology.

  • Joann Dillon
    Joann Dillon 6 days ago

    This does not compute!

  • lRaziel1
    lRaziel1 6 days ago

    how many 7 years old do we need to run Crysis at 720p in mid settings?

  • Nguyễn Nam
    Nguyễn Nam 6 days ago

    Simpler idea of Quantum Bit: Spinning coin. Current state of this coin is both Head and Tail. When you want to "see", stop it by your finger and it will present 1 side. The other side is reverse without looking.

  • Harry Baguio
    Harry Baguio 7 days ago

    You lost me

  • Blue Zerg
    Blue Zerg 7 days ago +1

    *whats is the default search engine?*

  • Crash
    Crash 7 days ago

    But can it run crysis?

  • TemBark
    TemBark 7 days ago +1

    providing more hacking tools to csgo noob

  • Shadow77999
    Shadow77999 8 days ago

    I think its safe to say were all not smart enough to understand this arent we?..

  • Justin Hannay
    Justin Hannay 8 days ago

    This is wrong. 14nm isn't the size of the transistor, it's the space between them.

  • Nch N ff
    Nch N ff 8 days ago

    My brain is too stupid for this...shame on me

    SYED AZEEM 8 days ago

    I am the students of Btech from electrical and electronics engineering streem
    And i easily understand all the concepts Quantum physics and Analog and Digital electronics which are come across your brilliant video ..😇😇😇
    Believe me a person who doesn't have any knowledge about such subject can't understand at all..
    This video also give s me hidden msg that their is 🤗🤗much need of well advance engineer's for Advanced Humman Civilization ..
    Thanx for this video its help me alot in gathering my knowledge of different subjects at one ..place 😍😇😇

  • Fernando Vito
    Fernando Vito 8 days ago

    and there is only one way to find out

    3 sextilion years later


  • Barry Potter
    Barry Potter 8 days ago +2

    *Brain intensifies*

  • got any 3's?
    got any 3's? 8 days ago

    Does anyone else hear the music from "PewDiePies Tuber simulator" in the background.

  • Max Blarb
    Max Blarb 9 days ago

    But can it run fortnite?

  • The IRIS
    The IRIS 9 days ago

    this channel is so much easier to understand

  • Shadow
    Shadow 10 days ago

    in 30y this will be a home computer

  • hgb 0
    hgb 0 10 days ago +1

    Can we put qubit in normal Computer

  • Xwater
    Xwater 10 days ago

    why you put to finnish are you finnish , ihmisen teknologian rajoitukset

  • Muhammad Al Fatih
    Muhammad Al Fatih 10 days ago

    Can it divide by zero?

  • Cylux Halfheart
    Cylux Halfheart 10 days ago


  • Psycho Andreas
    Psycho Andreas 10 days ago

    Now they say the wont replace normal pc's...
    This reminds me of something 🤔

  • Psycho Andreas
    Psycho Andreas 10 days ago

    0 Ping with superpositions 😱

    • Kablash
      Kablash 9 days ago

      With quantum entanglement you mean? Unfortunately not, quantum entanglement can't be used to send information. It would be the dream though..

  • FinnieBallzzz
    FinnieBallzzz 10 days ago

    my brain hurts

    • YellowDasher
      YellowDasher 5 days ago

      But how can something that doesn't exist hurt?

  • Zninja Playz
    Zninja Playz 11 days ago

    Kirzgesagt spent only 7:17 minutes to tell us about quantum computers but it took me 7:17 hours to understand it..

  • 10000 subscribers without Videos

    Windows 20 right there

  • Cade Prime
    Cade Prime 12 days ago

    my head hurts

  • Bray Munroe
    Bray Munroe 12 days ago

    Damn so once we can make quantum computers are entire current password system will be completely undone

  • raditya respati
    raditya respati 12 days ago

    I thought y'all guys felt smart enought after watchin rick n mortay.

  • ToSixZer
    ToSixZer 12 days ago

    No joke my brain hurts

  • Juan Lema-Sinchi
    Juan Lema-Sinchi 13 days ago

    Did I hear a pack a punched weapon when the photon hit the filter?

  • Keisuke Takahashi
    Keisuke Takahashi 13 days ago

    Awesome video, you motivated me. Now I’m off to build a computer!

  • Alin Gupta
    Alin Gupta 13 days ago +3

    1:44 basic math huh, 0*1 isn’t 1. It’s 0.

    • Knightlycat moonSpotter
      Knightlycat moonSpotter 7 days ago +1

      That's the only wrong thing you spotted at 1:44?
      lol it was supposed to be a joke xd

  • Aiseruchan
    Aiseruchan 13 days ago

    4:29 me rn

  • Saheb 000
    Saheb 000 14 days ago

    Computer is best .it will best always

  • Meme Mistake
    Meme Mistake 14 days ago

    I want a Quantum Gaming PC bitch.

  • Wasd78
    Wasd78 14 days ago

    Every science video I come across like this one I can't concentrate but only think WHERE ARE THE DAMN SPACESHIPS AND SPACE COLONIES

  • Zachary Zoet
    Zachary Zoet 14 days ago

    I finally understand that observation or measurement of an photon in superposition requires the photon to stop 🛑 wiggling, zooming and spinning, like predicting the result of a coin toss where one cannot actually know which side’s up until it lands. Thanks

  • Student Of The GAME
    Student Of The GAME 15 days ago

    It sounds like they're trying to make them based on the same tech we make regular computers with.. Why? The result of a superpositioned particle doesn't depend on the input - it depends on the observation. The damn thing runs reverse.

  • Dark Coffee Bean
    Dark Coffee Bean 15 days ago

    2:29 who caught that Rick and Morty reference?

  • DamianZocker
    DamianZocker 15 days ago +1

    But can it run Crysis?!?! Thats the question of life with quantom computer

  • Crtipz Gaming
    Crtipz Gaming 15 days ago

    how about just not make the computer smaller just make it bigger geez

  • Matthew Bay
    Matthew Bay 16 days ago

    "the more you buy quantum GPU the more you save" Nvidia in 2030

    • Kablash
      Kablash 9 days ago

      Only 100.000$ for the QTX 1080.

  • Lucrezia
    Lucrezia 16 days ago

    Why do I find it so difficult to understand?!? 😭😭😭

    SVINKA _GD 16 days ago


  • Optic G
    Optic G 17 days ago

    So a subatomic gtx 1080?

  • Dia 7 é 17
    Dia 7 é 17 17 days ago

    Quantum Computers, Dark Energy, 4th dimension, Black Holes it doesn't make any sense. Scientific calculations that lead to absurd theories and nowhere.

    • 0 Subscribers
      0 Subscribers 13 days ago +1

      Dia 7 é 17 You do realize that there are already working prototypes of quantum computers? Also your understanding of math and physics seems to be 0 since you call them absurd.

  • Alp Fidan
    Alp Fidan 17 days ago

    That rick and morty ref. tho

  • Discovaria
    Discovaria 18 days ago

    gamers are happy to get gaming quantum computer

  • burak kapıcı
    burak kapıcı 18 days ago

    My brain is burning...

  • Berlin99999
    Berlin99999 19 days ago

    Wow, you used the IBM Atom Boy at 1:55. I really like that :)

  • windigoking
    windigoking 19 days ago

    Can i install lime wire on the quantum computer?

  • Jargo Neo
    Jargo Neo 19 days ago

    Can it run this “(*-*)”

  • atomic936
    atomic936 20 days ago +1

    ''wow your ex really hates you''
    Thanks compuer

  • Think before you act.

    Ghad bless you!

  • GoldenBeans
    GoldenBeans 22 days ago

    so i have multiple passwords wich are hard to decypher , and you're telling me if they succesfully make a quantum computer, and it gets it the wrong hands it doesnt matter whether you have a password?

    thanks, good to know to be flipping paranoid now

    • GoldenBeans
      GoldenBeans 21 day ago

      good, encryptions are fun :0

    • Ambient Morality
      Ambient Morality 22 days ago +1

      only some encryption methods are insecure with quantum computers. All of them are still hard to break - they would require a far larger and far more stable quantum computer than anything we have today. We know new encryption methods which are slightly slower (by an order of magnitude or two, but still computers are fast) but are quantum-resistant.

  • Buhe Billion
    Buhe Billion 22 days ago

    even if COD wont run;it would be great

  • tom fazz
    tom fazz 23 days ago

    Bro what the fuck am i watching? Im so confused 😂 (not digging the vid)

  • Jaqueline Rios
    Jaqueline Rios 23 days ago

    But can it minecraft?

  • gym is life
    gym is life 24 days ago +2

    I dont Need school

    • Stp_poika !
      Stp_poika ! 8 days ago

      Shadow77999 I live under a bridge I dont Need that crap

    • Shadow77999
      Shadow77999 8 days ago +1

      But you need dat sweet diploma ( ͡° ͜ʖ ͡°)

  • verdy mrajasa
    verdy mrajasa 24 days ago

    Dont you dare create real ultron system

  • ItzYoBoi DatOneGuy
    ItzYoBoi DatOneGuy 24 days ago


  • TheUnknownElite Gaming And More

    Does it mean it is possible to make robot that targets viruses and could split Hiv From Dna

  • Emine Yaman
    Emine Yaman 24 days ago

    But, can it broking in my heart?

  • Greebeth74
    Greebeth74 24 days ago

    GOD I love your channel. You teach people stuff that's important, but not well known, and with birds no less.

  • Hang Jebat
    Hang Jebat 24 days ago +1

    Scorpion anyone?

  • Ivo k
    Ivo k 25 days ago

    But can it run minesweeper?

  • BaskingBlade
    BaskingBlade 25 days ago

    The Bloch sphere is a representation of a qubit, the fundamental building block of quantum computers.
    Part of a series of articles about
    Quantum mechanics
    {\displaystyle i\hbar {\frac {\partial }{\partial t}}|\psi (t)\rangle ={\hat {H}}|\psi (t)\rangle } {\displaystyle i\hbar {\frac {\partial }{\partial t}}|\psi (t)\rangle ={\hat {H}}|\psi (t)\rangle }
    Schrödinger equation
    Introduction Glossary History
    Advanced topics[show]
    Quantum computing is computing using quantum-mechanical phenomena, such as superposition and entanglement.[1] A quantum computer is a device that performs quantum computing. Such a computer is different from binary digital electronic computers based on transistors. Whereas common digital computing requires that the data be encoded into binary digits (bits), each of which is always in one of two definite states (0 or 1), quantum computation uses quantum bits or qubits, which can be in superpositions of states. A quantum Turing machine is a theoretical model of such a computer, and is also known as the universal quantum computer. The field of quantum computing was initiated by the work of Paul Benioff[2] and Yuri Manin in 1980,[3] Richard Feynman in 1982,[4] and David Deutsch in 1985.[5]
    As of 2018, the development of actual quantum computers is still in its infancy, but experiments have been carried out in which quantum computational operations were executed on a very small number of quantum bits.[6] Both practical and theoretical research continues, and many national governments and military agencies are funding quantum computing research in additional effort to develop quantum computers for civilian, business, trade, environmental and national security purposes, such as cryptanalysis.[7] A small 20-qubit quantum computer exists and is available for experiments via the IBM quantum experience project. D-Wave Systems has been developing their own version of a quantum computer that uses annealing.[8]
    Large-scale quantum computers would theoretically be able to solve certain problems much more quickly than any classical computers that use even the best currently known algorithms, like integer factorization using Shor's algorithm (which is a quantum algorithm) and the simulation of quantum many-body systems. There exist quantum algorithms, such as Simon's algorithm, that run faster than any possible probabilistic classical algorithm.[9] A classical computer could in principle (with exponential resources) simulate a quantum algorithm, as quantum computation does not violate the Church-Turing thesis.[10]:202 On the other hand, quantum computers may be able to efficiently solve problems which are not practically feasible on classical computers.
    A classical computer has a memory made up of bits, where each bit is represented by either a one or a zero. A quantum computer, on the other hand, maintains a sequence of qubits, which can represent a one, a zero, or any quantum superposition of those two qubit states;[10]:13-16 a pair of qubits can be in any quantum superposition of 4 states,[10]:16 and three qubits in any superposition of 8 states. In general, a quantum computer with {\displaystyle n} n qubits can be in an arbitrary superposition of up to {\displaystyle 2^{n}} 2^{n} different states simultaneously[10]:17. (This compares to a normal computer that can only be in one of these {\displaystyle 2^{n}} 2^{n} states at any one time).
    A quantum computer operates on its qubits using quantum gates and measurement (which also alters the observed state). An algorithm is composed of a fixed sequence of quantum logic gates and a problem is encoded by setting the initial values of the qubits, similar to how a classical computer works. The calculation usually ends with a measurement, collapsing the system of qubits into one of the {\displaystyle 2^{n}} 2^{n} eigenstates, where each qubit is zero or one, decomposing into a classical state. The outcome can therefore be at most {\displaystyle n} n classical bits of information (or, if the algorithm did not end with a measurement, the result is an unobserved quantum state).
    Quantum algorithms are often probabilistic, in that they provide the correct solution only with a certain known probability.[11] Note that the term non-deterministic computing must not be used in that case to mean probabilistic (computing), because the term non-deterministic has a different meaning in computer science.
    An example of an implementation of qubits of a quantum computer could start with the use of particles with two spin states: "down" and "up" (typically written {\displaystyle |{\downarrow }\rangle } |{\downarrow }\rangle and {\displaystyle |{\uparrow }\rangle } |{\uparrow }\rangle , or {\displaystyle |0{\rangle }} |0{\rangle } and {\displaystyle |1{\rangle }} |1{\rangle }). This is true because any such system can be mapped onto an effective spin-1/2 system.
    A quantum computer with a given number of qubits is fundamentally different from a classical computer composed of the same number of classical bits. For example, representing the state of an n-qubit system on a classical computer requires the storage of 2n complex coefficients, while to characterize the state of a classical n-bit system it is sufficient to provide the values of the n bits, that is, only n numbers. Although this fact may seem to indicate that qubits can hold exponentially more information than their classical counterparts, care must be taken not to overlook the fact that the qubits are only in a probabilistic superposition of all of their states. This means that when the final state of the qubits is measured, they will only be found in one of the possible configurations they were in before the measurement. It is generally incorrect to think of a system of qubits as being in one particular state before the measurement, since the fact that they were in a superposition of states before the measurement was made directly affects the possible outcomes of the computation.

    Qubits are made up of controlled particles and the means of control (e.g. devices that trap particles and switch them from one state to another).[12]
    To better understand this point, consider a classical computer that operates on a three-bit register. If the exact state of the register at a given time is not known, it can be described as a probability distribution over the {\displaystyle 2^{3}=8} 2^{3}=8 different three-bit strings 000, 001, 010, 011, 100, 101, 110, and 111. If there is no uncertainty over its state, then it is in exactly one of these states with probability 1. However, if it is a probabilistic computer, then there is a possibility of it being in any one of a number of different states.
    The state of a three-qubit quantum computer is similarly described by an eight-dimensional vector {\displaystyle (a_{0},a_{1},a_{2},a_{3},a_{4},a_{5},a_{6},a_{7})} {\displaystyle (a_{0},a_{1},a_{2},a_{3},a_{4},a_{5},a_{6},a_{7})} (or a one dimensional vector with each vector node holding the amplitude and the state as the bit string of qubits). Here, however, the coefficients {\displaystyle a_{i}} a_{i} are complex numbers, and it is the sum of the squares of the coefficients' absolute values, {\displaystyle \sum _{i}|a_{i}|^{2}} {\displaystyle \sum _{i}|a_{i}|^{2}}, that must equal 1. For each {\displaystyle i} i, the absolute value squared {\displaystyle \left|a_{i}\right|^{2}} {\displaystyle \left|a_{i}\right|^{2}} gives the probability of the system being found in the {\displaystyle i} i-th state after a measurement. However, because a complex number encodes not just a magnitude but also a direction in the complex plane, the phase difference between any two coefficients (states) represents a meaningful parameter. This is a fundamental difference between quantum computing and probabilistic classical computing.[13]
    If you measure the three qubits, you will observe a three-bit string. The probability of measuring a given string is the squared magnitude of that string's coefficient (i.e., the probability of measuring 000 = {\displaystyle |a_{0}|^{2}} {\displaystyle |a_{0}|^{2}}, the probability of measuring 001 = {\displaystyle |a_{1}|^{2}} {\displaystyle |a_{1}|^{2}}, etc.). Thus, measuring a quantum state described by complex coefficients {\displaystyle (a_{0},a_{1},a_{2},a_{3},a_{4},a_{5},a_{6},a_{7})} {\displaystyle (a_{0},a_{1},a_{2},a_{3},a_{4},a_{5},a_{6},a_{7})} gives the classical probability distribution {\displaystyle (|a_{0}|^{2},|a_{1}|^{2},|a_{2}|^{2},|a_{3}|^{2},|a_{4}|^{2},|a_{5}|^{2},|a_{6}|^{2},|a_{7}|^{2})} {\displaystyle (|a_{0}|^{2},|a_{1}|^{2},|a_{2}|^{2},|a_{3}|^{2},|a_{4}|^{2},|a_{5}|^{2},|a_{6}|^{2},|a_{7}|^{2})} and we say that the quantum state "collapses" to a classical state as a result of making the measurement.
    An eight-dimensional vector can be specified in many different ways depending on what basis is chosen for the space. The basis of bit strings (e.g., 000, 001, …, 111) is known as the computational basis. Other possible bases are unit-length, orthogonal vectors and the eigenvectors of the Pauli-x operator. Ket notation is often used to make the choice of basis explicit. For example, the state {\displaystyle (a_{0},a_{1},a_{2},a_{3},a_{4},a_{5},a_{6},a_{7})} {\displaystyle (a_{0},a_{1},a_{2},a_{3},a_{4},a_{5},a_{6},a_{7})} in the computational basis can be written as:
    {\displaystyle a_{0}\,|000\rangle +a_{1}\,|001\rangle +a_{2}\,|010\rangle +a_{3}\,|011\rangle +a_{4}\,|100\rangle +a_{5}\,|101\rangle +a_{6}\,|110\rangle +a_{7}\,|111\rangle } {\displaystyle a_{0}\,|000\rangle +a_{1}\,|001\rangle +a_{2}\,|010\rangle +a_{3}\,|011\rangle +a_{4}\,|100\rangle +a_{5}\,|101\rangle +a_{6}\,|110\rangle +a_{7}\,|111\rangle }
    where, e.g., {\displaystyle |010\rangle =\left(0,0,1,0,0,0,0,0\right)} {\displaystyle |010\rangle =\left(0,0,1,0,0,0,0,0\right)}

  • Beytullah Dereli
    Beytullah Dereli 25 days ago

    Our brain works similar with that way imo. When we dream instantly it appears when we decide to what we wanna look.

    • Ambient Morality
      Ambient Morality 22 days ago

      You don't know anything about how a quantum computer works, so you can't make connections like that.
      Quantum computers have nothing to do with doing "everything at once", whatever that means.

  • Phone Naing Kha
    Phone Naing Kha 25 days ago

    Permanent brain damage

  • Rob
    Rob 25 days ago

    Full credit for the Rick and Morty reference at 2:29.
    Big thumbs up

  • Seth Hall
    Seth Hall 26 days ago


  • David Qebadze
    David Qebadze 26 days ago

    ooooh i get it now! everything is clear!

  • Jeffrey over9000
    Jeffrey over9000 26 days ago

    But can it answer Baldi's 3rd question in the second notebook in Baldi's Basics?

  • AMV-Senpai
    AMV-Senpai 26 days ago

    if ""entanglement is a connection that makes each of the qubits react to a change in the other's state instantaneseouly no matter how far they are apart "" then it's faster than the light speed

  • Mojos Bigstick
    Mojos Bigstick 26 days ago

    It's quantum baby.