Martin Posted July 8, 2005 Posted July 8, 2005 There are several approaches to the problem of quantizing gravity which are different from the string approach because not concerned with treating gravity is a force (mediated by graviton particles) in a fixed geometrical setting. These don't attempt to unify all interactions, but instead are based on the Gen Rel premise that GRAVITY IS GEOMETRY. So what these "geometrical" QG approaches try to do is quantize spacetime geometry What geometrical QG approaches have in common is they try to get a handle on all the possible shapes the universe could be, and how the shape evolves. So the goal is to be able to calculate quantum expectation values, of things like the spatial dimension, or things like transition amplitudes of evolving from one shape space to another. An increasingly prominent line of GQG research is the Triangulations approach invented in 1998 by Loll and Ambjorn. After some initial confusion about what to call it, the authors now call it CDT (causal dynamical triangulations). Here is the growth of CDT papers. CDT ARXIV POSTINGS 2003 TO PRESENT 2003 3 2004 4 2005(to date) 6 To get the numbers I used these links, excluding from the 2003 list a survey paper which mentioned CDT but was not really about it. 2003: http://arxiv.org/find/grp_physics/1/OR+OR+abs:+AND+triangulations+AND+Lorentzian+dynamical+abs:+AND+triangulations+AND+causal+dynamical+ti:+AND+gravity+AND+Lorentzian+quantum/0/1/0/2003/0/1 2004: http://arxiv.org/find/grp_physics/1/OR+OR+abs:+AND+triangulations+AND+Lorentzian+dynamical+abs:+AND+triangulations+AND+causal+dynamical+ti:+AND+gravity+AND+Lorentzian+quantum/0/1/0/2004/0/1 2005 (so far, i.e. up into July): http://arxiv.org/find/grp_physics/1/OR+OR+abs:+AND+triangulations+AND+Lorentzian+dynamical+abs:+AND+triangulations+AND+causal+dynamical+ti:+AND+gravity+AND+Lorentzian+quantum/0/1/0/2005/0/1 On January 1, 2006, about 6 months from now, we will know what the total CDT postings for 2005 is. WHAT IS YOUR GUESS ABOUT 2005 POSTINGS OF RESEARCH PAPERS in this geometrical QG approach? Triple last year's? around 12 More than double 2004? 9 Double last year's? 8 One more for the year? 7 Just what we already have? 6 It's set up as a public poll so we will know who guessed what, and then come the first of next year we can see whose guess was closest. Everyone is welcome to post their guesses individually on this thread too.
J.C.MacSwell Posted July 8, 2005 Posted July 8, 2005 I'll go 14! All those string theorist jumping like rats off a sinking ship have to go somewhere!
Martin Posted July 8, 2005 Author Posted July 8, 2005 I'll go 14! All those string theorist jumping like rats off a sinking ship have to go somewhere! Have to confess I laughed out loud at this, MacSwell. I will be more cautious and say 8 (twice last year) I intended, but somehow failed, to make this a public poll. somehow the box must have come unchecked. those who want, please post your guesses and i will tabulate. I see there is one anonymous who guessed as I did. OUR PREDICTIONS FOR CDT RESEARCH POSTINGS THIS YEAR anonymous 8 MacSwell 14 me 8
ydoaPs Posted July 8, 2005 Posted July 8, 2005 sorry, i thought it was a public poll. um, i was the anonymous guy.
Martin Posted July 8, 2005 Author Posted July 8, 2005 i was the anonymous guy. thank you, Yourda I thought i was going to get the poll to be public but something went awry. OUR PREDICTIONS FOR CDT RESEARCH POSTINGS THIS YEAR Yourdadonapogos 8 MacSwell 14 me 8
Martin Posted July 8, 2005 Author Posted July 8, 2005 A new anonymous has predicted 9 research papers this year in the CDT approach to a geometrical quantum gravity theory. OUR PREDICTIONS FOR CDT RESEARCH POSTINGS THIS YEAR Mister Nine 9 Yourdadonapogos 8 MacSwell 14 me 8 As a rule I think it would be best if guessers would reveal their identities so when we check next january we know who predicted what.
Martin Posted July 11, 2005 Author Posted July 11, 2005 My wild guess = 12. list updated accordingly OUR PREDICTIONS FOR CDT RESEARCH POSTINGS THIS YEAR Spyman 12 Mister Nine 9 Yourdadonapogos 8 MacSwell 14 me 8
Martin Posted July 12, 2005 Author Posted July 12, 2005 OUR PREDICTIONS FOR CDT RESEARCH POSTINGS THIS YEAR MacSwell 14 Spyman 12 Mister Nine 9 Yourdadonapogos 8 me 8 this is the final version, I will ask YT to kindly lock the thread for us and we can fish these up again after we see how the year goes. After 1 Jan 2006, the link to use for checking is http://arxiv.org/find/grp_physics/1/OR+OR+abs:+AND+triangulations+AND+Lorentzian+dynamical+abs:+AND+triangulations+AND+causal+dynamical+ti:+AND+gravity+AND+Lorentzian+quantum/0/1/0/2005/0/1 howevermany that link gets, then whosever guess is closest wins good luck YT, or other of the SFN powers that be, please lock the thread!
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