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Physics

Free Will and Turing-completeness of the Brain

Posted in Chemistry, Computer Science, Philosophy, Physics, Science, Technology, Transhumanism, Uploading on February 22nd, 2007 by leodirac – 9 Comments

In this essay, I’m going to explore the question “If the human brain is Turing complete, what does that imply about the existence of free will?” And moreover, what does that mean about the ability to upload our consciousness into computers? First, a little computer science background. Turing completeness is the idea that a computing system has the same capabilities as a universal Turing machine. This theoretical machine moves along a long tape which has various symbols on it that the machine can read and write. The machine itself is always in one internal state, but will change to different…

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More detailed critique of Quantum Communication Paper

Posted in Ego, Humor, Physics, Science on December 1st, 2006 by leodirac – Comments Off on More detailed critique of Quantum Communication Paper

Yesterday I got all excited about a journal article indicating the possibility of faster-than-light communication through quantum entanglement. But I got excited before fully reading the article, and once I had I wrote a quick comment apologizing for the false alarm. It’s not a peer-reviewed article, and it’s not very scientific. I actually spent hours digging through their references trying to understand what they were saying, and wrote a longish post to a mailing list about it, so I figure I might as well share the analysis here. First, a minor quip from page 3 where they confuse atomic number…

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Faster Than Light Communication?

Posted in Physics, Science on November 30th, 2006 by leodirac – 3 Comments

I haven’t had a chance to fully digest this article yet, but it looks like somebody’s figured out a way to use quantum entanglement to communicate useful information. Seems to me that there’s a fair bit of grandstanding going on, not the least of which is the title of the article: Intercontinental quantum liaisons between entangled electrons in ion traps of thermoluminescent crystals The fact that they shipped an entangled crystal across the pacific to perform the experiment sounds like pure drama to me. The interesting part is that they seem to have found a mechanism to do something to…

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