Martin Posted September 2, 2005 Share Posted September 2, 2005 http://www.arxiv.org/abs/hep-th/0509010 The Universe from Scratch R. Loll, J. Ambjorn, J. Jurkiewicz 30 pages, 5 figures; review paper commissioned by Contemporary Physics and aimed at a wider physics audience Report-no: SPIN-05/28, ITP-UU-05/34 "A fascinating and deep question about nature is what one would see if one could probe space and time at smaller and smaller distances. Already the 19th-century founders of modern geometry contemplated the possibility that a piece of empty space that looks completely smooth and structureless to the naked eye might have an intricate microstructure at a much smaller scale. Our vastly increased understanding of the physical world acquired during the 20th century has made this a certainty. The laws of quantum theory tell us that looking at spacetime at ever smaller scales requires ever larger energies, and, according to Einstein's theory of general relativity, this will alter spacetime itself: it will acquire structure in the form of "curvature". What we still lack is a definitive Theory of Quantum Gravity to give us a detailed and quantitative description of the highly curved and quantum-fluctuating geometry of spacetime at this so-called Planck scale. - This article outlines a particular approach to constructing such a theory, that of Causal Dynamical Triangulations, and its achievements so far in deriving from first principles why spacetime is what it is, from the tiniest realms of the quantum to the large-scale structure of the universe." Link to comment Share on other sites More sharing options...
GammaMambo Posted September 9, 2005 Share Posted September 9, 2005 the hip bone's connected to the... i like to think the "smaller" scale is just discarding the reality we have attatched to what we scrutinize. i think our perception of reality is what keeps us from some of the answers we seek. Link to comment Share on other sites More sharing options...
Martin Posted September 9, 2005 Author Share Posted September 9, 2005 the hip bone's connected to the... back bone http://ingeb.org/spiritua/demdrybo.html Link to comment Share on other sites More sharing options...
GammaMambo Posted September 9, 2005 Share Posted September 9, 2005 too bad I haven't the patience to find a backbone link...an eternal golden braid will just have to do. Link to comment Share on other sites More sharing options...
Martin Posted September 9, 2005 Author Share Posted September 9, 2005 too bad I haven't the patience to find a backbone link.. the backbone is connected to the shoulder bone Link to comment Share on other sites More sharing options...
Locrian Posted September 9, 2005 Share Posted September 9, 2005 CDT seems more popular by the day. Link to comment Share on other sites More sharing options...
Martin Posted September 9, 2005 Author Share Posted September 9, 2005 CDT seems more popular by the day. the latest was that link to Martin Reuter QEG (quantum Einstein gravity). I think Loll has a lock on the Loops 05 conference because she and Reuter found the same microscopic structure of 4D spacetime, but came at it from very different directions so its like the thaw in northern countries when the streams start running and the ice on the river begins to break up. the exact moment is hard to pinpoint but let's say it is Wednesday 12 October in the morning at Potsdam and Loll speaks at 9AM and then Reuter at 10AM if you are a science journalist or an historian, that is the time to be in the lecture hall---quantum gravity-wise http://loops05.aei.mpg.de/index_files/Programme.html'>http://loops05.aei.mpg.de/index_files/Programme.html http://loops05.aei.mpg.de/ Link to comment Share on other sites More sharing options...
GammaMambo Posted September 13, 2005 Share Posted September 13, 2005 http://www.thebutterscotchthreshold.com/lego-escher-01.jpg Map out quantum gravity in lego form...what a big box that would be. Link to comment Share on other sites More sharing options...
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