A beginner's guide to quantum computing | Shohini Ghose

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. Aryan Divyanshu on September 8, 2019 at 7:09 pm

    Hi , future people.
    I knew you will come back to this classic computer to check your innovation’s past.
    Just don’t forget that we have gems called memes, preserve them, they are very precious.



  2. Hiden Entity on September 8, 2019 at 7:11 pm

    The explanation for dummies and investors.

    At first, if they would interpret the collected 3072 results in backward manner (square – flip the coin , circle – not flip) would this mean, that humans won in 97 % cases?
    At second, this game is not based on calculations, but on the generator of random numbers (usually its a function of current precise time in microseconds). So, what actually quantum computer does to win this game?
    Quantum computers are good in brute force algorithms, when you need to check the result of 2^N variants in one time.

    But the most funny is the quantum network.
    When we entangle two particles, and then decohere one of them (check is state), them at the same time other particle takes the same state.

    But the choice of state is fully random! We can generate a random number with the set of pairs, and this number can be the key for encryption.
    But we see here no information transfer!
    Instant information transfer violates the principle of causality in relativity theory )
    We will send the signal in our past.

    But they work on it!
    They don`t have results yet , but they work )



  3. chijin kumar on September 8, 2019 at 7:15 pm

    If quantum computers are so good at computation how 3% of the people won?



  4. Dragon ball Super on September 8, 2019 at 7:15 pm

    You can make a simmulation of universe by quantum computer



  5. tgmforum tgmforum on September 8, 2019 at 7:18 pm

    The more I look into it, the parallels between this and cold fusion are hysterical. "It works, except we can’t do it cold…. And that’s the big thing we have to solve. "



  6. Ramiro Gonzalez on September 8, 2019 at 7:20 pm

    Very interesting & helpful explanation about Quantum Physics ๐Ÿ™โ˜ฎ๏ธ
    Thank you & Congratulations for the Young Girl Quantum Physicists, me like your Parents are very proud of you,long and prosper life for you โ˜ฎ๏ธ๐Ÿ™



  7. Stefan Gabor on September 8, 2019 at 7:22 pm

    One of the best explanation I have found so far.



  8. Bharath Shetty on September 8, 2019 at 7:23 pm

    Quantum = Free + Possibilities + Next to next Level + Peace throughout



  9. Edwin Campuzano on September 8, 2019 at 7:24 pm

    Mmmmm… Yep I know some of those words.



  10. e2jw on September 8, 2019 at 7:27 pm

    An explanation? This is the what without the how. Thanks for wasting my time



  11. Goldpenny1 on September 8, 2019 at 7:28 pm

    If you flip a coin (and as it is flipping) it is neither heads nor tails, until you stop it and read it. No $sh!t! That is still called digital – 2 states – heads or tails. What it is while it’s being flipped is irrelevant !! And, much of what I have seen so far about quantum computing – is irrelevant. Someone please show from the electronic component level, how quantum computing works; just like that good looking IBM quantum computer (lol). No one has been able to so far…otherwise it’s just more quantum BS.



  12. Matt Parsons on September 8, 2019 at 7:28 pm

    seems like this chick watched a Kurzegat video and the Wikipedia for quantum computers just so that she could describe herself as a "quantum physicist."



  13. yoons on September 8, 2019 at 7:29 pm

    Not even a minute in while she is explaining the coin game and Iโ€™m already confused ๐Ÿ˜ข



  14. Anoop Balan on September 8, 2019 at 7:29 pm

    Nice



  15. Rusty Pistol on September 8, 2019 at 7:30 pm

    "The future is fundamentally uncertain and that is certainly exciting for me"



  16. Stefano Goio on September 8, 2019 at 7:30 pm

    Mmmm
    It’s looks like you have to study some years to understand why a perfectly programmed quantum computer can always win the coin game or teletrasporting datas.
    10 minutes suits better for learning pancake recipe.



  17. Tim Dongling on September 8, 2019 at 7:31 pm

    I am certainly a fan of science but this is just weird. If the human player flips the coin and if the result remains unknown how can the machine (quantum machine) undo the result in its favour. And why were there operational errors? If you think about the first example, message encryption, 3% failure rate due to "operational errors" would be quite disturbing.



  18. Gerardo Moscatelli on September 8, 2019 at 7:32 pm

    Let’s ask an audience of more than 200 people to randomly pick an integer between 0 and 1. Let’s pretend that we are stupid enough to not be able to predict the average answer.



  19. Deadstick on September 8, 2019 at 7:32 pm

    Yeah, let’s use computers as a crutch — Let the computer do everything. Let a computer do something as simple as turning a light on instead of you flipping the switch. Then people will just end up like those fat blobs in the movie, Wall-E.



  20. lindavid1975 on September 8, 2019 at 7:34 pm

    Another super confident individual fails to explain quantum computing – the search goes on.



  21. Merle May on September 8, 2019 at 7:34 pm

    Bought yourself an ouija board..it has updated info.about time traveling.. An explanaciรณn..wow!! So realistic…



  22. agnatha vasi on September 8, 2019 at 7:36 pm

    As in the above application of coin game when playing through the quantum computer, we first take the choice of head, so after all the process done by the quantum computer means after the last flip as quantum computer unmix the 0 and 1 and perfectly the recovering the heads. this is how it works.
    but when initially we don’t know the coin (as in this case "heads") so that both gamer and quantum computer had equal amount of chance like 50% . Is this true?????
    can you please tell me the answer??(Shohini Ghose)



  23. Nirmala Dumbre on September 8, 2019 at 7:36 pm

    User: what is 2+2?
    Quan comp : its 20%=3 and 80%=4



  24. Xelo migo on September 8, 2019 at 7:40 pm

    Probability dont even work that way lol. When head and tail has only two side doesnt mean you will get 50 heads and 50 tails in a 100 flips. It only means you will get 50% chance to get head and 50% to get tail. Wrong!



  25. Simon Sozzi on September 8, 2019 at 7:41 pm

    Is she going to explain the game or not?๐Ÿค”๐Ÿ‘Ž๐Ÿผ



  26. Harry on September 8, 2019 at 7:41 pm

    Whats wrong with the explaination? can someone explain?



  27. 316SILENTDEATH on September 8, 2019 at 7:42 pm

    Not 1 shred of proof from any who want you buy this load of BS.its all snake oil.the idea is that quantum does not have errors.so much for her



  28. Illuminator on September 8, 2019 at 7:43 pm

    Oh dear!
    I never thought I’d say this, but I miss Feynman.



  29. Intrafacial86 on September 8, 2019 at 7:46 pm

    *Alternate Title:* _Token minority speaker goes on and on about everything else except the topic at hand_



  30. razorgarf on September 8, 2019 at 7:46 pm

    1. You choose a side
    2. Computer choose a side
    3. You flip a coin physically and get the result
    4. The computer wins almost 100% of the flips. I don’t think so.



  31. Tanvir Ahmed on September 8, 2019 at 7:49 pm

    Is the given example just a metaphor? I mean what would be the possible outcome if the conditions were reversed (Head = Human Wins, Tail = Computer Wins)? How the probability distribution of two eigenstates are calculated in this specific example?



  32. Ankit kumar on September 8, 2019 at 7:49 pm

    With that technology hackers would also adapt new ways to secretly control other devices if you agree like means yes and comments means no๐Ÿ‘‡๐Ÿ‘‡๐Ÿ‘‡๐Ÿ‘‡๐Ÿ‘‡๐Ÿ‘‡๐Ÿ‘‡



  33. Rudy Gay on September 8, 2019 at 7:50 pm

    this is my prof lol



  34. Karen Revell on September 8, 2019 at 7:50 pm

    If human intelligence is 1’s and 0’s, the qbit is 1/0 combined is God intelligence; don’t you think it will win every time??



  35. Sina S. on September 8, 2019 at 7:51 pm

    That was one of the most stupid examples I’ve ever heard!



  36. Twobarpsi on September 8, 2019 at 7:51 pm

    Let’s try to make my current cell phone work first before we start making quantum computers๐Ÿ˜‚๐Ÿ˜‚๐Ÿ˜‚



  37. Gerardo Moscatelli on September 8, 2019 at 7:51 pm

    I can’t believe this stupid video that only mystifies QC has more than one million views. This is not an explanation of QC. This is an example of how Google algorithms can promote stupidity



  38. Michal Mazgal on September 8, 2019 at 7:51 pm

    I have a task for a quantum computer. The monitor can display the entire universe, we can look at other civilizations, and I have the task, find all the images combined into one.

    In this film we see each other and maybe we are ashamed of our stupidity.



  39. Skull360 on September 8, 2019 at 7:52 pm

    Dont worry guys, the video is made by a quantum computer, its a beginners guide and not at the same time



  40. Retro Boob on September 8, 2019 at 7:55 pm

    Quantum computers will never exist.



  41. cole weeks on September 8, 2019 at 7:58 pm

    What if the coin were a sphere with faces on opposite sides?



  42. Mike Parsons on September 8, 2019 at 7:59 pm

    I have no idea what she is saying



  43. KingAllenCreations on September 8, 2019 at 8:00 pm

    Quantum BS



  44. Theburrowingid on September 8, 2019 at 8:01 pm

    A probable explanation of ESP.



  45. James McGinn on September 8, 2019 at 8:02 pm

    I smell a great big fat rat.



  46. ybelt4ever on September 8, 2019 at 8:05 pm

    Does the computer recognise the characteristics of the coin, which you don’t? So you can win if some of your competitors opt out? Is that physics? Sniff.



  47. dark ashes on September 8, 2019 at 8:06 pm

    we need to stop using quantum computers on earth , we should start using them in actual space to get faster quantum computers using solar panels and dry batteries also the quantum computer will suck the super cold temperatures of space to work way faster and 100 % energy efficient and cost way cheaper to run this is a real quantum computer not slow old school way of using quantum computers , Long Live the FutureSpace Quantum Computers.



  48. MrAtown3057 on September 8, 2019 at 8:06 pm

    When you fart and it’s a wet one
    There you have it quantum computing



  49. anthony jenson on September 8, 2019 at 8:06 pm

    I can write a program on my computer to flip the coin heads 100 percent of the time…does this means my windows is turned to quantum computer, kind of scary



  50. jumper analyzer on September 8, 2019 at 8:07 pm

    ๆ—ฅๆœฌ่ชžใ€ๅญ—ๅน•ใŒใปใ—ใ„ใงใ™
    ( ๏ผ›โˆ€๏ผ›)