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Quantum lecture

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    #32
    Jack B. Badd
    Registered Users Posts: 3,294 ✭✭✭Jack B. Badd


    Job :)


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    #33
    Jack B. Badd
    Registered Users Posts: 3,294 ✭✭✭Jack B. Badd


    Ah godammit! I was all excited about the announcement of a viable 16-qubit quantum computer until I read this.
    The phrase "D-Wave themselves admit that they "are not sure" if the device is actually doing quantum computations" does not exactly inspire confidence :(


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    #34
    Blitzkrieger
    Registered Users Posts: 6,660 ✭✭✭Blitzkrieger


    If it's not doing quantum computations, how did it get the answer?


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    #35
    Fysh
    Moderators, Arts Moderators, Regional Abroad Moderators Posts: 11,054 Mod ✭✭✭✭Fysh


    Well, surely the difficulty with identifying something as being a quantum-type computer or not is that you need an initially time-consuming problem to confront it with (eg cracking some form of encryption where brute-force attacks are too timeconsuming to be useful), and then see if it consistently comes up with the right answer in a significantly shorter timespan.

    There again, if they won't expose their tech to peer review I suspect something dodgy's going on somewhere.

    There again again, I managed to crash out until nearly midnight last night, hence missing the bloody lecture, so I'm possibly in no position to talk about it. :o


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    #36
    dahamsta
    Banned (with Prison Access) Posts: 16,659 ✭✭✭✭dahamsta


    Useless priest, can't say mass.

    Computation is computation, if there isn't a traditional computer in there, then something has to be afoot.

    But yes, D-Wave sounds a tad cold fusion. There's probably a Celeron in there. Or a dwarf, cranking the handle on a babbage engine.

    F*ck I'm a nerd.

    adam


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    #37
    Tree
    Moderators, Science, Health & Environment Moderators Posts: 4,708 Mod ✭✭✭✭Tree


    \o/ babbage engine!


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    #38
    Jack B. Badd
    Registered Users Posts: 3,294 ✭✭✭Jack B. Badd


    Fysh wrote:
    Well, surely the difficulty with identifying something as being a quantum-type computer or not is that you need an initially time-consuming problem to confront it with (eg cracking some form of encryption where brute-force attacks are too timeconsuming to be useful), and then see if it consistently comes up with the right answer in a significantly shorter timespan.

    Surely there has to be some other way of testing if the computer is performing quantum calculations rather than just using quantum mechanics as a part of the classical calculations without just timing it. I presume the test involves such ridiculously incomprehensible maths that the average twit with a physics degree wouldn't understand it. Or maybe not...


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