I hope i live long enough to see that last prediction come true. *promote

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I hope we continue to live for at least a little while afterwards as well

How can this guy do what he's doing if he's pretty sure the machines will take over in about 15 years...

There is no fate but what we make...

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*promote

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The more I listen to quantum mechanics the more it sounds like religious nuts. "Oh, we don't know what the qubit is, so that means it's everything, and like 4 or 5 parallel universes too!" it's perpetual motion machines all over again.

We don't have to fully understand it to use the benefits from it. I'm pretty sure we used fire's benefits for a long time before we understood it.

With the amount of money being spent by really smart people I'm sure something about it is valid. It's just, right now, they're all yammering about facts not in evidence. Also, as their quantum computers are actually slower and less powerful than contemporary computers, occam's razor would suggest it's a elaborate black box scam with a couple Raspberry Pies burbling away inside. Until they start using them to increase my FPS, I'm not buying into the technobabble.

When someone says something like "we're exploiting parallel universes", what they mean is that one of the many theories that can be used to describe quantum behaviour such as entanglement is to do with parallel universes.

That doesn't mean there aren't other theories, it doesn't mean there are parallel universes, it's just one of the few ways we can make it make sense is if it exists and carries information in a dimension that is not tangible to us.

When Archimedes invented his screw, using gravity to drive water uphill, he could have said that he's using an invisible multi-dimensional goblin to move the water; well that's one theory and its irrefutable until Newton makes an appearance. And even then you can still say "yeah but what we know of gravity is still a multidimensional goblin."

Having said that, it has as much likelihood of being correct as any other theory in its infancy.

One of those "problems conventional computers can't solve" is factoring primes (OK, they can, but it's very slow).

Quantum computers could make this very quick.... Which actually kinda sucks. Because, in a very simplistic sense, all encryption and by extension all electronic transactions depend on factoring primes being hard to do.

Basically quantum computers are going to break the Internet the second they become widely available.

I was hoping for more meat to his presentation, and was disappointed. I feel that he said absolutely nothing to help anyone in the audience understand what quantum computers actually DO or what sort of problems they'll help to solve. They'll absolutely not increase your FPS, as that's not what they're well-suited to do. What they are quite excellent at is taking a problem with many possible solutions and finding the correct (or best) one at an extremely high speed.

One example would be the Traveling Salesman problem. In brief, find the optimum route for traversing a number of points on a map. This is useful for things like scheduling package delivery routes, airline flights, etc. With a classic / current computer we write software that cleverly chugs through the possible solutions, throws out any that prove to be poor, and eventually gets to what appears to be the best or is at least a "good enough" solution. As the number of necessary points to be visited increases this problem scales in complexity quickly, so eventually a current computer would just choke on the problem and at best return an ok-ish solution in a reasonable period of time.

A quantum computer is a totally different beast. If it's "big" enough (IE, is comprised of a sufficient number of qubits), it takes the entire set of all possible solutions to the problem, and rather than iterate through them to find the best one, it checks them all simultaneously and immediately returns the optimum solution. It does this by using properties of quantum mechanics, and I think this is where the speaker was drawing his talk of parallel universes. If there are 3 qubits, they would exist as 000, 001, 010, 011, 100, 101, 110, and 111 simultaneously. The software would then define what the best answer would look like, and the computer returns the answer.

You can hopefully see how this totally breaks encryption. With a current computer and a long enough encryption key, an encoded message would take the fastest machines a huge number of years to decipher. With a quantum computer you hand it a gibberish encrypted message, it loads all possible transformations of that message simultaneously, and it then returns the transformation which looks most like a coherent message.

I'm excited to see what these machines can do for us, but they're going to necessitate some significant structural changes in how we handle sensitive data.

There is skepticism that the DWave even actually is a quantum computer:

https://www.wired.com/2014/05/quantum-computing/