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<DIV></DIV>>From: "John K Clark" <jonkc@att.net>
<DIV></DIV>>Reply-To: ExI chat list <extropy-chat@lists.extropy.org>
<DIV></DIV>>To: "ExI chat list" <extropy-chat@lists.extropy.org>
<DIV></DIV>>Subject: [extropy-chat] Quantum Computing
<DIV></DIV>>Date: Mon, 26 Jul 2004 16:22:04 -0400
<DIV></DIV>>
<DIV></DIV>>There is an interesting paper in the July 22 issue of Nature, a UCLA team
<DIV></DIV>>succeeded in flipping a single electron spin upside down in an ordinary
<DIV></DIV>>commercial transistor chip, and detected that the current changes when the
<DIV></DIV>>electron flips.
<DIV></DIV>>
<DIV></DIV>>Hong Wen Jiang, a UCLA professor of physics and member of the California
<DIV></DIV>>NanoSystems Institute, in whose laboratory the experiments were conducted
<DIV></DIV>>said:
<DIV></DIV>>
<DIV></DIV>>"Our research demonstrates that an ordinary transistor, the kind used in a
<DIV></DIV>>desktop PC or cell phone, can be adapted for practical quantum computing,
<DIV></DIV>>The research makes quantum computing closer and more practical. I would not
<DIV></DIV>>be surprised one day to see a quantum computer built, based almost entirely
<DIV></DIV>>on silicon technology.
<DIV></DIV>>
<DIV></DIV>>Eli Yablonovitch, co-author of the Nature paper said:
<DIV></DIV>>
<DIV></DIV>>"We've done this with a commercial silicon integrated circuit chip,
<DIV></DIV>>literally off a shelf. We've manipulated one spin, a year from now,
<DIV></DIV>>manipulating a single spin might be all in a day's work, and in 10 years,
<DIV></DIV>>perhaps it will have a commercial role. With 100 transistors, each
<DIV></DIV>>containing one of these electrons, you could have the implicit information
<DIV></DIV>>storage that corresponds to all of the hard disks made in the world this
<DIV></DIV>>year, multiplied by the number of years the universe has been around. And
<DIV></DIV>>why stop with 100 transistors?"
<DIV></DIV>>
<DIV></DIV>>John K Clark
<DIV></DIV>>
<DIV></DIV>>
<DIV></DIV>>
<DIV></DIV>>
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