A beginner's guide to quantum computing | Shohini Ghose

A quantum computer isn’t just a more powerful version of the computers we use today; it’s something else entirely, based on emerging scientific understanding — and more than a bit of uncertainty. Enter the quantum wonderland with TED Fellow Shohini Ghose and learn how this technology holds the potential to transform medicine, create unbreakable encryption and even teleport information.

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50 Comments

  1. Jhon Joffre on December 23, 2019 at 7:05 pm

    Still the end process lands into binary wanted or not, because the computer cannot calculate without the instances of have power or not to have power, although, when it have power (bit) this can be send in wide variety of frequencies to create the quantum process. However, it still rest in binary..
    Therefore, in so many ways you could be right assessing that a quantum process can be simulated into a computer, yet it doesn’t make the computer a quantum computer, regardless

  2. Teflon Smile on December 23, 2019 at 7:07 pm

    There is a 3% loss and NO ONE KNOWS where it goes….

  3. ANVIN P S on December 23, 2019 at 7:07 pm

    When was studying in 12th i was very much interested in quantum physics. But the study material and school syllabus were in english, so that I can’t even pass the Newtonian physics and ended up now as a jobless curious youth watching future technology videos

  4. Dav Mac on December 23, 2019 at 7:08 pm

    Yes the hacker cannot break the key with current technologies, but nothing is impossible.

  5. G. Hemanthsingh on December 23, 2019 at 7:10 pm

    Computer is cheating…😂😂

  6. MDX on December 23, 2019 at 7:12 pm

    Sooooooo the computer cheated? I can conclude with some certainty that if the computer provided me his choices prior to completing the game, I could “reveal” my choices and win close to 100% of the time. 😁

  7. Shahnawaz Khan on December 23, 2019 at 7:12 pm

    I resisted not to quit watching this video after seeing an Indian explaining the most complex thing in the world cause I really was curious about quantum physics but she stood to my expectations ,,,,

  8. Gabriele Manganelli on December 23, 2019 at 7:12 pm

    I don’t think that the explanation was clear but the speaker had very little time. For those who didn’t get it (like me) let’s represent head and tails as “state” vectors: |H>=(1,0) and |T>=(0, 1). In quantum mechanics a vector with norm 1 represents a physical state (wavefunction), for example (1/sqrt(2), 1/sqrt(2)) is the state where you have a fifty-fifty possibility of getting head or tails if you look at the coin. At the beginning the computer receives head (1 0) and returns the superposition (1/sqrt2, 1/sqrt2) : whatever the human does flipping this state won’t do anything. The first computer move was the same as applying the square 2×2 matrix [ (1/sqrt2, 1/sqrt2) ; (1/sqrt2, -1/sqrt2) ]. Applying it again to the state (1/sqrt2, 1/sqrt2) the human returned gives head (1,0). So yeah, the computer didn’t flip the coin. It used an operation that would make no sense for a classical computer since the only classical states are (1,0),(0,1) ; that is, head and tails. The “magic” is the fact that the quantum computer is certain to win whatever you do without ever looking at the coin! A classical computer could also always win but it has to look at the coin and choose whether to flip it or not.

  9. zioncommand on December 23, 2019 at 7:13 pm

    I’m here after watching Avengers: Endgame.

    (Spoiler Warning)

    Epstein didn’t kill himself.

  10. Kaushik Mane on December 23, 2019 at 7:14 pm

    Calculators have come a long way!!

  11. juli juli on December 23, 2019 at 7:17 pm

    i’ve attacked by hacker who i’ve known they’re chinese in France paris.they builder one website calls huarenjie.com
    and control my computer now. how should i do now? even my smartphone is attacked by them.i can’t even send my message. please help me.thank you very much.
    could you please contact me by my email: zhenxi0202@live.cn

  12. joao tugas on December 23, 2019 at 7:17 pm

    It’s Just like 0=No 1=yes but quantum beat=maybe (maybe yes, maybe not) ho knows =D

  13. Sudip Banerjee on December 23, 2019 at 7:18 pm

    One Ghosh is speaking about Quantum Computer and another Ghosh ( top BJP Leader in West Bengal) found GOLD on MILK…😂😂😂😂😂😂this is the fate of our nation…

  14. Zeshan Majeed on December 23, 2019 at 7:18 pm

    I will prefer incognito browser against quantum computer encryption

  15. zak girard on December 23, 2019 at 7:18 pm

    Sounds like High-tech gambling

  16. Debu Mazumder on December 23, 2019 at 7:18 pm

    A Bengali there…..proud race

  17. MORPHEUS on December 23, 2019 at 7:19 pm

    This lady sucks and I feel like they aren’t telling us 100% the truth about quantum computing I think this is a cosmic system that’s always been here and we are NOW tapping into it. this wasn’t invented out of nowhere people. We are already inside of the simulation

  18. Chris Saunders on December 23, 2019 at 7:19 pm

    mind blown

  19. barabimas K on December 23, 2019 at 7:19 pm

    so can we hack the yes or not or both?

  20. Shahnawaz Khan on December 23, 2019 at 7:20 pm

    Bullshit,,,its cheating,,,

  21. Muhammad Asif on December 23, 2019 at 7:20 pm

    A quantum computer can simulate our future using the human database of our time. The input from psychiatrists will play a major role. Psychiatrists should study everything.
    The Q computer can be used to simulate the most likely output of a new law or of a new policy. The most significant input parameter would be Culture. Culture codes for Q computer would need input from middle class. Unfortunately, middle class never produces philosophers. They just comply with the existing cultural codes.
    The cultural values of middle class may best be decoded by lower class individuals who dream for the upper class but are stuck with middle class……. house maids. 👍

  22. Mister Ramda on December 23, 2019 at 7:21 pm

    Bisexual isn’t fluid?

  23. moestietabarnak on December 23, 2019 at 7:22 pm

    quantum coin flip = cheat : if head = 0, partial flip and round down will always equal 0. .. how about we check the code ?
    or "I found a marvelous operation, multiply, as long as I multiply by zero I will always get zeroes !’ Magic !

  24. Draken One on December 23, 2019 at 7:22 pm

    It doesn’t matter how its done…its still manipulating the outcome to win. Ergo it is cheating. Otherwise it could not guarantee which way the coin is going to land.

  25. The Tinker on December 23, 2019 at 7:28 pm

    When there will be quantum internet
    We will use
    Qooqle

  26. Ragnar Lothbrok on December 23, 2019 at 7:28 pm

    I like her clear English. Is she a native speaker?

  27. Rupinder Singh on December 23, 2019 at 7:31 pm

    Quantum physics is very old for me now because you are not able to use brain Quantum physics because your two particulas are executed excellently but 3rd one totly block by your brain due to 9hz frequency

  28. rakesh singh on December 23, 2019 at 7:32 pm

    10:03 break the laws or know the laws

  29. rogerwalsberg on December 23, 2019 at 7:34 pm

    Do you really think the owners of this technology wont be able to "break their own encryption". They will build in a door, so breaking isnt required. A door only they can access.

  30. Ceki Gülcü on December 23, 2019 at 7:34 pm

    How NOT to explain anything in 10 minutes.

  31. Square Breaker on December 23, 2019 at 7:40 pm

    Oh man the future is looking bright! Can’t wait for quantum internet so that I can play a game of call of duty without lag.

  32. I Milev on December 23, 2019 at 7:40 pm

    did you understand that?
    well, i am in an insertitude. what do you think ?

  33. Md. Fakrul Islam Sarkar on December 23, 2019 at 7:40 pm

    Simple but effective presentation, thanks to Shohini Ghose. 😀

  34. 007 on December 23, 2019 at 7:40 pm

    You can’t use computer for medicines as humans life is not always probability. You can’t understand until you won’t suffer yourself. Machine has dead understanding, human awareness is always different.
    It can be used for computing where no life involved, Biology is always different.

  35. Tony Batt on December 23, 2019 at 7:41 pm

    Possibly the worst explanation ever!

  36. rogerwalsberg on December 23, 2019 at 7:42 pm

    I get a kick out of these people who are so excited about this tech, and how it can be used to solve problems. It’s really going to be used by the privelaged/rich to take advantage of the small people. Google. Facebook. Government.

  37. LameBrainMcCain on December 23, 2019 at 7:43 pm

    problems:
    1. noise (aka heat)
    2. coherence and entanglement times
    We won’t have a viable quantum computer for *YEARS* !

  38. I Shot Blanks on December 23, 2019 at 7:43 pm

    LGBTQs relating to superpositions is just too weird

  39. Bishal Fundamental on December 23, 2019 at 7:45 pm

    When I will become a physicist, I will make a much powerful quantum computer.

  40. Sachin Puri on December 23, 2019 at 7:48 pm

    Tell your quantum computer to play coin game with me.

  41. Myles Oakley on December 23, 2019 at 7:48 pm

    Okay, but can it run Crysis?

  42. Prestige Lawn Care on December 23, 2019 at 7:49 pm

    Da computer cheats. sounds like the internet just worded differently

  43. Anil Yaduvanshi on December 23, 2019 at 7:50 pm

    Quantum computing idea seems to be derived from Indian historical scripts …Just think deeply on our epics…!
    We could do teleportation in past, Remember those epics ?

  44. fndrn8 on December 23, 2019 at 7:50 pm

    I’m having trouble deciding on a combo number for my bike lock. Can I use your billion dollar quantum computer to decide? LOL

  45. Markus McKiernan on December 23, 2019 at 7:54 pm

    In the same respects, could a hacker with Quantum computing knowledge employ the same tactics against the victim?

  46. Roland Orzabal on December 23, 2019 at 7:54 pm

    She seemed to say a lot of nothing

  47. Prakhar Gupta on December 23, 2019 at 7:55 pm

    That was amazing !

  48. Muaaz Butt on December 23, 2019 at 7:55 pm

    can this be used to send quantum messages to look for other life forms in the universe ?

  49. Jordan Gons on December 23, 2019 at 8:02 pm

    Finally could have zero latency gaming. 🙂

  50. Kaushik Mane on December 23, 2019 at 8:03 pm

    So Basically this is Dr. Strange of computers minus the head shakes!!

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