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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 تعليقات

  1. I'm a casino dealer. Seeing this video, put a thought in my mind. Quantum Computing will destroy the gambling industry in the future. A small enough quantum computer could calculate blackjack card counts in fractions of a second and provide haptic feedback to the advantage player.

    Getting a quantum computer small enough to be used in a casino undetected, is a few decades away.
    Just a heads up to casino security in game protection, this is a serious new threat you should start preparing for and beat the AP's to it.

  2. The human being is not playing a game in this scenario as human inputs (flip or no flip) would require interaction with the QM computer and interaction (frequently referred to as "observation" in popularizations of QM) necessitates resolution of a superposition into a definitive outcome. The reality of this "test" is actually measuring how finely one can control probabilistic decomposition of a superposition into a single outcome. The "operational errors" to which she refers are actually residual probabilities that will always remain in any computational system of QM for the following reason: "resolving" a superposition into an outcome via observation is fundamentally a probabilistic enterprise and so one is essentially trying to create a very complicated corral or maze by which to steer an agent towards an outcome; the amount of times that the agent escapes your maze = the residue of probability that she's calling an "operational error".

    Quantum computing is, at least in all present applications as of 12/28/2019, a game of stage magic while individuals try and find some piece of the puzzle they're convinced they've missed to date in order to turn this into a viable computation strategy. Kinda sad really.

  3. 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

  4. 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. 👍

  5. 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.

  6. 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.

  7. 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.

  8. 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. 😁

  9. 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

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