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A Quantum Linear Equation Solver

joe writes "Aram Harrow and colleagues have just published on the arXiv a quantum algorithm for solving systems of linear equations (paper, PDF). Until now, the only quantum algorithms of practical consequence have been Shor's algorithm for prime factoring, and Feynman-inspired quantum simulation algorithms. All other algorithms either solve problems with no known practical applications, or produce only a polynomial speedup versus classical algorithms. Harrow et. al.'s algorithm provides an exponential speedup over the best-known classical algorithms. Since solving linear equations is such a common task in computational science and engineering, this algorithm makes many more important problems that currently use thousands of hours of CPU time on supercomputers amenable to significant quantum speedup. Now we just need a large-scale quantum computer. Hurry up, guys!"

4 of 171 comments (clear)

  1. RE: Obama didn't make it by lapinmalin · · Score: -1, Offtopic

    code quantum: what the fuck??

  2. Thoughts? by Anonymous Coward · · Score: -1, Offtopic

    Detroit just needs to be burned to the ground.

    First of all, it is an almost ALL BLACK city. Think that's a good idea? Look at fucking Africa. These people are still primitive, and have not evolved like us white peeps. Crime is HUGE in Detroit because black people are lazy and do not want to work for their money. End of story. Oh, and they are intellectually inferior. Think I'm wrong? The only smart jiglets are those who have some white blood in 'em.

    Second of all, the automotive industry in this country is laughable bullshit. The cars are junk. Look at the interior of a Ford. It looks like an infant could destroy their dashboards with a few feeble kicks.

    A junglebunny infant.

    And finally, Marshall Mathers came from there. Look at his goddamned face. He looks like an asshole criminal. Can you blame him, though? Being surrounded by ape-like drug dealers since inception would do that to any of us.

    Now I know I will be flamed for "being racist". But it is the fucking elephant in the room, people. Black people, as a whole, are degenerate. "Wih wih wih, you are ignorant, for shame for shame, blah blah blah!" Fuck that. Survival of the fittest... these jigaboos know it, and KNOW that they are inferior to us, and will die out eventually, and that is why they kill us. They are nothing but animals.

    Why do you think Barack Obama wants to outlaw firearms? Because he knows that then, instead of law-abiding WHITE people being able to defend themselves, only the CRIMAL BLACKS (100% of the entire black population) will have them, and thus will be able to rob and murder us with ease. Why haven't the major news outlets picked up on this? Oh that's right, because their hairy, crusty lips are wrapped around the monster cocks of the jig "elite".

    That goddamned movie with Denzel "Fatlips" Washington, about the "black criminal overlord", was nothing but a ploy made by the Tim Robbinses of the world to try to get INTELLIGENT WHITE PEOPLE to think that black people are smart. Well, guess what, you gynecomastia sufferer! It only presented more evidence that BLACK PEOPLE ARE ALL, DEEP DOWN, CRIMINALS.

    There are many of you who would never admit that you agree with what I have written. But, do you know what? You do agree.

    1. Re:Thoughts? by lancelotlink · · Score: 0, Offtopic

      The unfortunate darker side of online anonymity.

    2. Re:Thoughts? by ConceptJunkie · · Score: -1, Offtopic

      The unfortunate darker side of online anonymity.

      Meaning, on the internet, no one knows if you're a Secret Chimp?

      --
      You are in a maze of twisty little passages, all alike.