Quantum Gravity links?

Martin · 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 · May 23, 2004

You should try this site:http://www.damtp.cam.ac.uk/user/gr/public/qg_qc.html

Martin · 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 · 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 · 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 · 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 · 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 · 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 · June 1, 2004

At the moment when I try these links I get this many papers for the various years

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 · 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 · 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 · 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 · 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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