Martin Posted May 23, 2004 Posted May 23, 2004 Does anyone have some QG links they want to recommend as good introductions to the subject, or surveys of current research, or particularly good for explaining one particular line of research? As for a good (popularized) intro to Loop Quantum Gravity there is Lee Smolin's January 2004 Scientific American article called "Atoms of Space and Time". The trouble being that it is not, AFAIK, available free online. here is another good popularly written article by the German science journalist Rudy Vaas http://arxiv.org/abs/physics/0403112 "The Duel: Loops versus Strings" this one is available online. Vaas writes for a German magazine similar to the Scientific American----this article is in English however
Tesseract Posted May 23, 2004 Posted May 23, 2004 You should try this site:http://www.damtp.cam.ac.uk/user/gr/public/qg_qc.html
Martin Posted May 24, 2004 Author Posted May 24, 2004 You should try this site:http://www.damtp.cam.ac.uk/user/gr/public/qg_qc.html[/url'] Looks like a tribute to the approach Hawking and collaborators pursued in the 1990s as an alternative to inflation. After a brief 4 line paragraph about inflation, it switches to talking about the alternative: "The second contender for a theory of initial conditions is quantum cosmology, the application of quantum theory to the entire universe..." Tesseract, I found a recent review paper which mentions "Euclidean quantum gravity" approach of Hawking et al, but it gives no recent research papers (most was in 1990s I think) http://arxiv.org/gr-qc/0405107 "Quantum Gravity" Enrique Alvarez
Martin Posted May 24, 2004 Author Posted May 24, 2004 I found another review article which mentions Hawking's "euclidean quantum gravity" and compares it with loop and string. http://arxiv.org/gr-qc/9803024 "Strings, loops and others: a critical survey of the present approaches to quantum gravity" Carlo Rovelli (Plenary lecture on quantum gravity at the GR15 conference) ------------- here's a link to get recent preprints of non-string Quantum Gravity research papers: Last twelve months (e.g. 14 June 2003 to 14 June 2004): http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+simplicial+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+dynamical+triangulation/0/1/0/past/0/1 this is designed to catch: loop quantum gravity loop quantum cosmology canonical quantum gravity simplicial quantum gravity nonperturbative quantum gravity spin foam dynamical triangulation
Martin Posted May 27, 2004 Author Posted May 27, 2004 An interesting clue to current developments in HEP is the Spires HEP database at Stanford/SLAC http://www.slac.stanford.edu/library/topcites/ Every year Spires puts out a "top Forty" or "top Hundred" list of most-cited research papers and the ranking for 2003 just came out. http://www.slac.stanford.edu/library/topcites/2003/annual.shtml Here is the Spires Topcited papers in 2003, with only the recent papers showing. I want to see what kinds of recent papers are getting cited a lot, so I have eliminated everything from 1999 and earlier. (there were a lot of older papers in the Spires list which I went thru and removed by hand) the number is how many times the paper was cited by papers in the HEP database---ones that appeared in 2003---e.g. the Particle Data Group article was cited by 1702 other papers. there were 4 recent (since 1999) string papers that got 125 or more citations. to make them easy to spot they are in bold ----------------- 1702 REVIEW OF PARTICLE PHYSICS. PARTICLE DATA GROUP By Particle Data Group (K. Hagiwara et al.). Most recent version published in Phys.Rev.D66:010001,2002 0812 FIRST YEAR WILKINSON MICROWAVE ANISOTROPY PROBE (WMAP) OBSERVATIONS: DETERMINATION OF COSMOLOGICAL PARAMETERS By D.N. Spergel, L. Verde, Hiranya V. Peiris, E. Komatsu, M.R. Nolta, C.L. Bennett, M. Halpern, G. Hinshaw, N. Jarosik, A. Kogut, M. Limon, S.S. Meyer, L. Page, G.S. Tucker, J.L. Weiland, E. Wollack, E.L. Wright. Published in Astrophys.J.Suppl.148:175,2003 [arXiv: astro-ph/0302209] 0505 FIRST YEAR WILKINSON MICROWAVE ANISOTROPY PROBE (WMAP) OBSERVATIONS: PRELIMINARY MAPS AND BASIC RESULTS By C.L. Bennett, M. Halpern, G. Hinshaw, N. Jarosik, A. Kogut, M. Limon, S.S. Meyer, L. Page, D.N. Spergel, G.S. Tucker, E. Wollack, E.L. Wright, C. Barnes, M.R. Greason, R.S. Hill, E. Komatsu, M.R. Nolta, N. Odegard, Hiranya V. Peiris, L. Verde, J.L. Weiland. Published in Astrophys.J.Suppl.148:1,2003 [arXiv: astro-ph/0302207] 0351 FIRST RESULTS FROM KAMLAND: EVIDENCE FOR REACTOR ANTI-NEUTRINO DISAPPEARANCE By KamLAND Collaboration (K. Eguchi et al.). Published in Phys.Rev.Lett.90:021802,2003 [arXiv: hep-ex/0212021] 0285 DIRECT EVIDENCE FOR NEUTRINO FLAVOR TRANSFORMATION FROM NEUTRAL CURRENT INTERACTIONS IN THE SUDBURY NEUTRINO OBSERVATORY By SNO Collaboration (Q.R. Ahmad et al.). Published in Phys.Rev.Lett.89:011301,2002 [arXiv: nucl-ex/0204008] 0197 STRINGS IN FLAT SPACE AND PP WAVES FROM N=4 SUPERYANG-MILLS By David Berenstein, Juan M. Maldacena, Horatiu Nastase (Princeton, Inst. Advanced Study). Published in JHEP 0204:013,2002 [arXiv: hep-th/0202021] 0189 MEASUREMENT OF DAY AND NIGHT NEUTRINO ENERGY SPECTRA AT SNO AND CONSTRAINTS ON NEUTRINO MIXING PARAMETERS By SNO Collaboration (Q.R. Ahmad et al.). Published in Phys.Rev.Lett.89:011302,2002 [arXiv: nucl-ex/0204009] 0189 WILKINSON MICROWAVE ANISOTROPY PROBE (WMAP) FIRST YEAR OBSERVATIONS: TEMPERATURE - POLARIZATION POLARIZATION By A. Kogut, D.N. Spergel, C. Barnes, C.L. Bennett, M. Halpern, G. Hinshaw, N. Jarosik, M. Limon, S.S. Meyer, L. Page, G. Tucker, E. Wollack, E.L. Wright. Published in Astrophys.J.Suppl.148:161,2003 [arXiv: astro-ph/0302213] 0186 FINAL RESULTS FROM THE HUBBLE SPACE TELESCOPE KEY PROJECT TO MEASURE THE HUBBLE CONSTANT By W.L. Freedman, B.F. Madore, B.K. Gibson, L. Ferrarese, D.D. Kelson, S. Sakai, J.R. Mould, R.C. Kennicutt, H.C. Ford, J.A. Graham, J.P. Huchra, S.M.G. Hughes, G.D. Illingworth, L.M. Macri, P.B. Stetson, P.B. Stetson (Carnegie Inst. Observatories & Caltech, IPAC & Swinburne U., Ctr. Astrophys. Supercomput. & Rutgers U., Piscataway & Carnegie Inst., Wash., D.C. & NOAO, Tucson & Res. Sch. Astron. Astrophys., Weston Creek & Arizona U., Astron. Dept. - Steward Observ. & Johns Hopkins U. & Harvard-Smithsonian Ctr. Astrophys. & Cambridge U., Inst. of Astronomy & Lick Observatory & Dominion Astrophys. Obs., Victoria). Published in Astrophys.J.553:47-72,2001 [arXiv: astro-ph/0012376] 0180 MEASUREMENT OF THE RATE OF NU/E + D --> P + P + E- INTERACTIONS PRODUCED BY B-8 SOLAR NEUTRINOS AT THE SUDBURY NEUTRINO OBSERVATORY By SNO Collaboration (Q.R. Ahmad et al.). Published in Phys.Rev.Lett.87:071301,2001 [arXiv: nucl-ex/0106015] 0177 THE SLOAN DIGITAL SKY SURVEY: TECHNICAL SUMMARY By SDSS Collaboration (Donald G. York et al.). Published in Astron.J.120:1579-1587,2000 [arXiv: astro-ph/0006396] 0162 FIRST YEAR WILKINSON MICROWAVE ANISOTROPY PROBE (WMAP) OBSERVATIONS: IMPLICATIONS FOR INFLATION By H.V. Peiris, E. Komatsu, L. Verde, D.N. Spergel, C.L. Bennett, M. Halpern, G. Hinshaw, N. Jarosik, A. Kogut, M. Limon, S.S. Meyer, L. Page, G.S. Tucker, E. Wollack, E.L. Wright (Princeton U. & NASA, Goddard & British Columbia U. & Chicago U., EFI & CFCP, Chicago & Brown U. & UCLA). Published in Astrophys.J.Suppl.148:213,2003 [arXiv: astro-ph/0302225] 0139 THE SLOAN DIGITAL SKY SURVEY: EARLY DATA RELEASE By SDSS Collaboration (Chris Stoughton et al.). Published in Astron.J.123:485-548,2002 0135 ROLLING TACHYON By Ashoke Sen (Harish-Chandra Res. Inst. & Penn State U.). Published in JHEP 0204:048,2002 [arXiv: hep-th/0203211] 0134 A PERTURBATIVE WINDOW INTO NONPERTURBATIVE PHYSICS By Robbert Dijkgraaf (Amsterdam U. & Amsterdam U., Inst. Math.), Cumrun Vafa (Harvard U., Phys. Dept.). [arXiv: hep-th/0208048] 0133 A MEASUREMENT BY BOOMERANG OF MULTIPLE PEAKS IN THE ANGULAR POWER SPECTRUM OF THE COSMIC MICROWAVE BACKGROUND By Boomerang Collaboration (C.B. Netterfield et al.). Published in Astrophys.J.571:604-614,2002 [arXiv: astro-ph/0104460] 0130 THE COSMOLOGICAL CONSTANT AND DARK ENERGY By P.J.E. Peebles (Princeton U.), Bharat Ratra (Kansas State U.). Published in Rev.Mod.Phys.75:559-606,2003 [arXiv: astro-ph/0207347] 0126 SOLAR B-8 AND HEP NEUTRINO MEASUREMENTS FROM 1258 DAYS OF SUPER-KAMIOKANDE DATA By Super-Kamiokande Collaboration (S. Fukuda et al.). Published in Phys.Rev.Lett.86:5651-5655,2001 [arXiv: hep-ex/0103032] 0125 TYPE IIB GREEN-SCHWARZ SUPERSTRING IN PLANE WAVE RAMOND-RAMOND BACKGROUND By R.R. Metsaev (Lebedev Inst.). Published in Nucl.Phys.B625:70-96,2002 [arXiv: hep-th/0112044] 0125 INDICATIONS OF NEUTRINO OSCILLATION IN A 250 KM LONG BASELINE EXPERIMENT By K2K Collaboration (M.H. Ahn et al.). Published in Phys.Rev.Lett.90:041801,2003 [arXiv: hep-ex/0212007] 0124 NEW GENERATION OF PARTON DISTRIBUTIONS WITH UNCERTAINTIES FROM GLOBAL QCD ANALYSIS By J. Pumplin, D.R. Stump, J. Huston, H.L. Lai, P. Nadolsky, W.K. Tung (Michigan State U.). Published in JHEP 0207:012,2002 [arXiv: hep-ph/0201195] ... ... ...
Martin Posted May 31, 2004 Author Posted May 31, 2004 I want to try this link as a way of keeping track of current research http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,hep-ex,math-ph,hep-lat,cond-mat,physics,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/past/0/1 I wonder if it will copy right and become clickable WOW! It works. It does a search of arxiv for every paper posted in the last 12 months which had, in its abstract summary, the key words string OR brane OR braneworld OR D-brane OR M-theory OR p-brane Let me try to install a link for the same search but of papers dated in year 2000. http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/2000/0/1 that works too! You can see that in year 2000 there were posted 1491 research papers (with those keywords in the summary) and in the past 12 months, essentially June 2003 to June 2004, there were posted (according to this search engine) 1177. When you go to arxiv you may not always get the same database or search engine. Results seem to vary by the day of the week. The variation is not too great. I dont mind the jitter, but if you want more consistency always do your searches on some fixed day of the week. [edit: here is another link I want to try---arxiv search for LQG related papers] http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/past/0/1
Martin Posted May 31, 2004 Author Posted May 31, 2004 the links in the preceding two posts give a pulse check on the string research output. Quantity has been level or declining: 1491 in year 2000 under 1200 (depending on the day) in the past 12 months Quality as measured by number of citations garnered by recent papers has also been declining In 2003 there were only 4 recent (since 1999) papers which were cited 125 or more times, whereas in 1999 there were 18 recent (since 1995) papers which were cited 125 or more times. This is a drop by a factor of between four and five in the production of highly-cited influential research papers. It appears that less stringy research is being done overall and what is being done is less influential, distinguished, ground-breaking or whatever it is that being cited by a lot of other research measures. As it happens this does not interest me personally since I'm much more excited by some newer approaches to quantum gravity-----dynamical triangulations, spin foams, LQG. Essentially what intrigues me are those approaches which are background independent (dont require prior choice of a rigid geometry on which to base the model). But it seems to get other people concerned. At least in the USA the string research establishment has been highly publicized and accustomed to a fat slice of the funding pie. And now it seems to be (at least temporarily) in decline. so some are upset and some in denial and soforth. It has no cosmic significance but it seems worth knowing the underlying figures.
Martin Posted June 1, 2004 Author Posted June 1, 2004 this could be kind of interesting arxiv search for four years, 2000, 2001, up to the last 12-month period (currently 1 June 2003 to 1 June 2004) basically for Loop Quantum Gravity-related papers keywords in the abstract are listed below Year 2000: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/2000/0/1 Year 2001: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/2001/0/1 Year 2002: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/2002/0/1 Year 2003: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/2003/0/1 Last Twelve Months: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/past/0/1 the keyword boolean is: ((abs=((loop AND quantum) AND (cosmology OR gravity)) OR abs=((quantum AND gravity) AND ((discrete OR phenomenology) OR (canonical OR nonperturbative)))) OR abs=((spin AND foam) OR (doubly AND special))) which covers topics like: loop quantum gravity loop quantum cosmology discrete quantum gravity canonical quantum gravity nonperturbative quantum gravity quantum gravity phenomenology spin foam doubly special relativity
Martin Posted June 1, 2004 Author Posted June 1, 2004 At the moment when I try these links I get this many papers for the various years 2000 81 2001 92 2002 113 2003 128 LTM 132 the boolean search isnt perfect, it misses some and gets some it shouldnt but it seems useful for turning up new research related to quantum gravity (background independent non-stringy approaches) and getting an idea of how the various lines of research are going
Martin Posted June 2, 2004 Author Posted June 2, 2004 a paper on quantum gravity testing QG is hard to test, some theories may get tested by Glast (gammaray burst orbiting observatory scheduled for 2007) very slight effects accumulating over astronomical distances but these people in this paper, just out, talk about testing some features of QG theories with experimental apparatus on the ground. dont know if it is reasonable, they consulted with Jorge pullin, who is broadly knowledgeable, maybe their ideas are good, anyway here is the link http://arxiv.org/quant-ph/0406007 Could Energy Decoherence due to Quantum Gravity be observed? Christoph Simon, Dieter Jaksch 7 pages, no figures "It has recently been proposed that quantum gravity might lead to the decoherence of superpositions in energy, corresponding to a discretization of time at the Planck scale.... ... We also show how local energy decoherence, which acts separately on system and phase reference, could be detected with remarkable sensitivity and over a wide range of length scales by long-distance Ramsey interferometry with metastable atomic states. The sensitivity of the experiments can be further enhanced using multi-atom entanglement." --------------- today a new paper on loop quantum cosmology appeared http://arxiv.org/gr-qc/0406008 it is by J. Velhinho
Martin Posted June 2, 2004 Author Posted June 2, 2004 here a similar 5 links to those a couple of posts back but where abstract summary has the words string OR brane OR braneworld OR D-brane OR M-theory OR p-brane it is very unselective, if one wants to sift for quality then you look for papers by famous people with interesting titles or for papers which have been cited as references by a lot of others, this is just the raw output for each 12-month period Year 2000: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/2000/0/1 Year 2001: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/2001/0/1 Year 2002: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/2002/0/1 Year 2003: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/2003/0/1 Last twelve months (e.g. 1 June 2003 to 1 June 2004): http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/past/0/1
Martin Posted June 4, 2004 Author Posted June 4, 2004 the Stanford/SLAC Spires database has come out with their list of most-cited GRQC (General Relativity-Quantum Cosmology) papers http://www.slac.stanford.edu/library/topcites/2003/eprints/index.shtml a week earlier, when the HEP topcite list appeared, I sifted out the "hit" papers that had appeared recently (in the last 4 years, 2000 thru 2003) to get an idea of what recent research garners comparatively many citations. High energy physics (HEP) is a much larger field with more researchers and more publication, so the numbers are much larger. But by comparing this year's GRQC numbers and hot topics with those of past years one can get an impression of the trends in various lines of research. with a 4 year window defining "recent" here is the Spires list of highly cited GRQC papers----showing only recent papers: eg a preprint with number gr-qc/9910076 would be excluded as not recent because it appeared in 1999. change from 2002 is noted ----------quote, non-recent removed------ 2003 highly cited gr-qc papers 0058 up from zero QUASINORMAL MODES, THE AREA SPECTRUM, AND BLACK HOLE ENTROPY By Olaf Dreyer (Perimeter Inst. Theor. Phys.). Published in Phys.Rev.Lett.90:081301,2003 [PS file for arXiv: gr-qc/0211076] 0057 up from 27 AN ALTERNATIVE TO QUINTESSENCE By Alexander Yu. Kamenshchik (Landau Inst. & Landau Network Centro Volta), Ugo Moschella (Insubria U., Como & INFN, Milan), Vincent Pasquier (Saclay). Published in Phys.Lett.B511:265-268,2001 [PS file for arXiv: gr-qc/0103004] 0055 up from 31 THE CONFRONTATION BETWEEN GENERAL RELATIVITY AND EXPERIMENT By Clifford M. Will (Washington U., St. Louis). Published in Living Rev.Rel.4:4,2001 [PS file for arXiv: gr-qc/0103036] 0052 up from zero AN ANALYTICAL COMPUTATION OF ASYMPTOTIC SCHWARZSCHILD QUASINORMAL FREQUENCIES By Lubos Motl (Harvard U., Phys. Dept.). Published in Adv.Theor.Math.Phys.6:1135-1162,2003 [PS file for arXiv: gr-qc/0212096] 0052 down from 57 RELATIVITY IN SPACE-TIMES WITH SHORT DISTANCE STRUCTURE GOVERNED BY AN OBSERVER INDEPENDENT (PLANCKIAN) LENGTH SCALE By Giovanni Amelino-Camelia (Rome U.). Published in Int.J.Mod.Phys.D11:35-60,2002 [PS file for arXiv: gr-qc/0012051] 0049 up from 36 INTRODUCTION TO MODERN CANONICAL QUANTUM GENERAL RELATIVITY By Thomas Thiemann (Potsdam, Max Planck Inst.). [PS file for arXiv: gr-qc/0110034] 0043 up from 16 GENERALIZED CHAPLYGIN GAS, ACCELERATED EXPANSION AND DARK ENERGY MATTER UNIFICATION By M.C. Bento, O. Bertolami, A.A. Sen (Lisbon, IST). Published in Phys.Rev.D66:043507,2002 [PS file for arXiv: gr-qc/0202064] 0038 up from zero QUASINORMAL MODES OF THE NEAR EXTREMAL SCHWARZSCHILD-DE SITTER BLACK HOLE By Vitor Cardoso, Jose P.S. Lemos (Lisbon, IST). Published in Phys.Rev.D67:084020,2003 [PS file for arXiv: gr-qc/0301078] 0036 up from 19 GENERALIZED LORENTZ INVARIANCE WITH AN INVARIANT ENERGY SCALE By Joao Magueijo (Imperial Coll., London), Lee Smolin (Perimeter Inst. Theor. Phys. & Waterloo U.). Published in Phys.Rev.D67:044017,2003 [PS file for arXiv: gr-qc/0207085] 0033 up from 21 QUANTUM GEOMETRY OF ISOLATED HORIZONS AND BLACK HOLE ENTROPY By A. Ashtekar (Penn State U. & Santa Barbara, KITP), John C. Baez (UC, Riverside & Penn State U.), Kiriil Krasnov (UC, Santa Barbara & Santa Barbara, KITP). Published in Adv.Theor.Math.Phys.4:1-94,2000 [PS file for arXiv: gr-qc/0005126] 0030 down from 54 CLASSICAL BLACK HOLE PRODUCTION IN HIGH-ENERGY COLLISIONS By Douglas M. Eardley, Steven B. Giddings (UC, Santa Barbara). Published in Phys.Rev.D66:044011,2002 [PS file for arXiv: gr-qc/0201034] 0029 up from zero D-DIMENSIONAL BLACK HOLE ENTROPY SPECTRUM FROM QUASINORMAL MODES By Gabor Kunstatter (Winnipeg U.). Published in Phys.Rev.Lett.90:161301,2003 [PS file for arXiv: gr-qc/0212014] 0027 up from zero ON QUASINORMAL MODES, BLACK HOLE ENTROPY, AND QUANTUM GEOMETRY By Alejandro Corichi (Mexico U., ICN). Published in Phys.Rev.D67:087502,2003 [PS file for arXiv: gr-qc/0212126] 0026 up from zero QUASINORMAL BEHAVIOR OF THE D-DIMENSIONAL SCHWARZSCHILD BLACK HOLE AND HIGHER ORDER WKB APPROACH By R.A. Konoplya (Dnepropetrovsk Natl. U.). Published in Phys.Rev.D68:024018,2003 [PS file for arXiv: gr-qc/0303052] 0026 SCALAR, ELECTROMAGNETIC AND WEYL PERTURBATIONS OF BTZ BLACK HOLES: QUASINORMAL MODES By Vitor Cardoso, Jose P.S. Lemos (Lisbon, IST). Published in Phys.Rev.D63:124015,2001 [PS file for arXiv: gr-qc/0101052] ... ... -------I dropped off the tail of the list, those with less than 25 citations-----
Martin Posted June 4, 2004 Author Posted June 4, 2004 Trend in raw output of papers, arxiv count Non-string quantum gravity, and string-related year Non-string QG String 2000 81 1481 2001 92 1487 2002 113 1362 2003 128 1062 LTM 134 729 this is as of today Friday 4 June 2004 the search engine at arxiv is a bit cranky so results vary some from day to day I got these counts by clicking on these links, which do keyword searches for papers with those keywords in the summary these are for the non-string QG papers: Year 2000: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/2000/0/1 Year 2001: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/2001/0/1 Year 2002: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/2002/0/1 Year 2003: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/2003/0/1 Last Twelve Months: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+doubly+special/0/1/0/past/0/1 these are for the String-related: ( abstract summary has the keywords string OR brane OR braneworld OR D-brane OR M-theory OR p-brane) Year 2000: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/2000/0/1 Year 2001: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/2001/0/1 Year 2002: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/2002/0/1 Year 2003: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/2003/0/1 Last twelve months (e.g. 1 June 2003 to 1 June 2004): http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+OR+string+brane+abs:+OR+braneworld+D-brane+abs:+OR+M-theory+p-brane/0/1/0/past/0/1 For Non-string QG the keyword boolean used is: ((abs=((loop AND quantum) AND (cosmology OR gravity)) OR abs=((quantum AND gravity) AND ((discrete OR phenomenology) OR (canonical OR nonperturbative)))) OR abs=((spin AND foam) OR (doubly AND special))) which covers topics like: loop quantum gravity loop quantum cosmology discrete quantum gravity canonical quantum gravity nonperturbative quantum gravity quantum gravity phenomenology spin foam doubly special relativity a slightly different search picks up some this one misses: 2001: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+OR+spinfoam+AND+spin+foam+AND+doubly+special/0/1/0/2001/0/1 2002: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+OR+spinfoam+AND+spin+foam+AND+doubly+special/0/1/0/2002/0/1 2003: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+OR+spinfoam+AND+spin+foam+AND+doubly+special/0/1/0/2003/0/1 Last Twelve Months: http://arXiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+OR+discrete+phenomenology+OR+canonical+nonperturbative+abs:+OR+OR+spinfoam+AND+spin+foam+AND+doubly+special/0/1/0/past/0/1 ------------------ http://arxiv.org/find/nucl-ex,astro-ph,nucl-th,math-ph,hep-ex,physics,cond-mat,hep-lat,quant-ph,gr-qc,hep-ph,hep-th/1/OR+OR+abs:+AND+AND+loop+quantum+OR+cosmology+gravity+abs:+AND+AND+quantum+gravity+OR+simplicial+OR+canonical+nonperturbative+abs:+OR+AND+spin+foam+AND+dynamical+triangulation/0/1/0/past/0/1
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