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Science

Open Qubit [Open Source Quantum Computing Group] 18

skwp writes "Open Qubit is a Open Source project for a Quantum Computer simulation API. It has recently bought its own domain and is currently (judging by mailing list) has reached a size of 103 members. The list is a place for physicists, mathematicians, computer people, and laymen to ask each other questions, and collaborate on this project. No Quantum Mechanics experience is required to join up; just a desire to learn. OpenQubit is currently holding a logo contest. "
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Open Qubit [Open Source Quantum Computing Group]

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  • by Zyber ( 2303 )
    Shutup first.
  • What you have to realize is that QM is an incomplete theory and is as close to reality as Einstein's SR & GR and Newton's Mechanics (not close at all).

    Quantum Mechanics is single most successful scientific theory humans have devised. The predicted values from thoery don't vary from the experimentally measured values until the 10th decimal place!* That's pretty damm close to reality.

    You are correct in saying QM is incomplete. Every theory is incomplete! However, given the success of QM, any new theory will be an extention of, not a replacement for, QM. Just as relativity is an extention of Newtonian mechanics.

    SteveM

    *references (two that I quickly pulled off my book shelf, I'm sure there are better ones):
    QED by Feynman
    Dreams of a Final Theory by Weinberg
  • One problem with QM is that creates various paradoxes,
    one of which was introduced by Einstein and his colleague.


    The Einstien-Podolsky-Rosen (EPR) experiment is the basis for
    the quantum teleportation of a photon's spin (see here [slashdot.org]).
    This property of entanglement is what wires together the qubits
    in a quantum computer (see Scientific American, June 1998).

    Pretty handy that paradox.

    What we forget is that Newton's mechanics "laws" which are
    supposedly wrong (according to Einstein's theories) also work.


    Of course they work. Newton's laws are derivable from Einstein's
    under the assumptions of relatively (no pun intended) slow speeds
    and low masses. Newton's and Einstein's laws both break down in the
    quantum domain. Thus the search for a theory of quantum gravity.

    One big problem with Quantum Computing is that,
    we require an entire industry scale laboratory to
    store _1_ bit!@$$@


    Curious ...

    ENIAC required 150 KW of power and filled a room 30x50 feet.
    It stored numbers in decimal format, using ten flip-flops
    to store a single decimal digit. The machine could store twenty
    digits. But for some reason, the developers went ahead even
    though abaci, slide rules, and even mechanical calculators
    were available!

    Electromechanical calculators were also available, but they
    were somewhat on the larger side also. For example, the
    IBM Automatic Sequential Calculator, aka the Harvard
    Mark I, weighed five tons, and was 51 feet long.

    Today,commercial NMR spectrometers are used for experimenting
    with quantum computing. I don't know exactly how large such
    devices are, but the NMR equipment I used as an under grad was
    somewhat smaller than an "industry scale laboratory". In any
    case, Neil Gershehfeld (at MIT) and Isaac Chuang (at IBM) are
    currently building a desktop quantum computer.

    The ENIAC project started April 9, 1943. The PalmPilot
    Professional, which is somewhat more portable, uses two
    AAA batteries, and has 2M RAM, was introduced in 1997.

    Pretty good for 54 years. I expect we'll see similar reults
    with quantum computing.

    I don't expect a GR based computer either ...

    The entire universe could be considered a GR computer.
    Although it is somewhat larger than that "industry scale
    laboratory"

    Steve M
  • There are some things that quantum computers cannot do, and while factoring large numbers is one thing they can do (leading to the end of all known secure public key encryption) it is possible to make codes that cannot be effectively attacked by a quantum computer. In addition, programming a quantum computer (as they exist now) is a NASTY thing, so any complex and ugly algorithm would be secure for as long as it takes to devise a quantum method of doing it. Make it nasty enough and it could be just as secure as triple-DES or IDEA is today.
  • It was people like you who ridiculed Edison when he claimed to be able to power a lamp with electricity, and record sound, and who ridiculed Marconi when he claimed it was possible to transmit sound without wires, etc.

    If you have solid proof of why it "will never happen", present it. Otherwise you can just shut up until you have something constructive to say.

I've noticed several design suggestions in your code.

Working...