Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Our picks for 2008 MIP (most important QG paper)

  1. The Uncanny Precision of the Spectral Action (Connes et al)

    50.0%
  2. Loop Quantum Cosmology: An Overview (Ashtekar)

    0 vote(s)
    0.0%
  3. Loop Quantum Gravity (new review by Rovelli)

    16.7%
  4. LQG propagator: III. The new vertex (Rovelli et al)

    33.3%
  5. Self-energy and vertex radiative corrections in LQG (Rovelli et al)

    0 vote(s)
    0.0%
  6. Background-free propagation in loop quantum gravity (Speziale)

    0 vote(s)
    0.0%
  7. On the semiclassical limit of 4d spin foam models (Freidel et al)

    0 vote(s)
    0.0%
  8. Path integral representation of spin foam models of 4d gravity (Freidel et al)

    33.3%
  9. A Lagrangian approach to the Barrett-Crane spin foam model (Livine et al)

    33.3%
  10. The Nonperturbative Quantum de Sitter Universe (Loll et al)

    33.3%
  11. Bare Action and Regularized Functional Integral of Asymptotic Safe Quantum Gravity (Reuter et al)

    0 vote(s)
    0.0%
  12. Motion of a “small body” in non-metric gravity (Krasnov)

    16.7%
  13. Effective Theory of Braid Excitations of Quantum Geometry in terms of Feynman Diagrams (Wan)

    16.7%
Multiple votes are allowed.
  1. Dec 30, 2008 #1

    marcus

    User Avatar
    Science Advisor
    Gold Member
    2015 Award
    Dearly Missed

    The poll allows multiple choices...which are your picks for the 2008 papers likely to prove most valuable to future research?

    The Uncanny Precision of the Spectral Action
    Ali H. Chamseddine, Alain Connes
    http://arxiv.org/abs/0812.0165

    Loop Quantum Cosmology: An Overview
    Abhay Ashtekar
    http://arxiv.org/abs/0812.0177

    Loop Quantum Gravity
    Carlo Rovelli
    (new review)
    http://relativity.livingreviews.org/Articles/lrr-2008-5/

    LQG propagator: III. The new vertex
    Emanuele Alesci, Eugenio Bianchi, Carlo Rovelli
    http://arxiv.org/abs/0812.5018

    Self-energy and vertex radiative corrections in LQG
    Claudio Perini, Carlo Rovelli, Simone Speziale
    http://arxiv.org/abs/0810.1714

    Background-free propagation in loop quantum gravity
    Simone Speziale
    http://arxiv.org/abs/0810.1978

    On the semiclassical limit of 4d spin foam models
    Florian Conrady, Laurent Freidel
    http://arxiv.org/abs/0809.2280

    Path integral representation of spin foam models of 4d gravity
    Florian Conrady, Laurent Freidel
    http://arxiv.org/abs/0806.4640

    A Lagrangian approach to the Barrett-Crane spin foam model
    Valentin Bonzom, Etera R. Livine
    http://arxiv.org/abs/0812.3456

    The Nonperturbative Quantum de Sitter Universe
    J. Ambjorn, A. Goerlich, J. Jurkiewicz, R. Loll
    http://arxiv.org/abs/0807.4481

    Bare Action and Regularized Functional Integral of Asymptotically Safe Quantum Gravity
    Elisa Manrique, Martin Reuter
    http://arxiv.org/abs/0811.3888

    Motion of a “small body” in non-metric gravity
    Kirill Krasnov
    http://arxiv.org/abs/0812.3603

    Effective Theory of Braid Excitations of Quantum Geometry in terms of Feynman Diagrams
    Yidun Wan
    http://arxiv.org/abs/0809.4464

    ================================
    Most of these papers have been discussed some already in PF threads. One however was just posted at arxiv today. Since it may not be already known, I'll give the abstract for it:
    LQG propagator: III. The new vertex
    Emanuele Alesci, Eugenio Bianchi, Carlo Rovelli
    "In the first article of this series, we pointed out a difficulty in the attempt to derive the low-energy behavior of the graviton two-point function, from the loop-quantum-gravity dynamics defined by the Barrett-Crane vertex amplitude. Here we show that this difficulty disappears when using the corrected vertex amplitude recently introduced in the literature. In particular, we show that the asymptotic analysis of the new vertex amplitude recently performed by Barrett, Fairbairn and others, implies that the vertex has precisely the asymptotic structure that, in the second article of this series, was indicated as the key necessary condition for overcoming the difficulty."
     
    Last edited: Dec 30, 2008
  2. jcsd
  3. Dec 31, 2008 #2

    marcus

    User Avatar
    Science Advisor
    Gold Member
    2015 Award
    Dearly Missed

    Many of these papers are from the last quarter of the year, and all but a few so recent they've barely had time to garner citations---ordinarily a helpful sign of how influential a paper is going to be. Though still too early to report counts, I will list a few parenthetically, as a sample, and give the cits links in case anyone wants to check later on.

    BTW I'd like to add a Stephon Alexander paper as a "write-in". If you want to put in a plug for it, just post to that effect. I'll add it onto this list.

    The Uncanny Precision of the Spectral Action
    Ali H. Chamseddine, Alain Connes
    http://arxiv.org/cits/0812.0165

    Loop Quantum Cosmology: An Overview
    Abhay Ashtekar
    http://arxiv.org/cits/0812.0177

    Loop Quantum Gravity
    Carlo Rovelli
    (new review)
    http://www.slac.stanford.edu/spires/find/hep/www?j=00222,11,5

    LQG propagator: III. The new vertex
    Emanuele Alesci, Eugenio Bianchi, Carlo Rovelli
    http://arxiv.org/cits/0812.5018

    Self-energy and vertex radiative corrections in LQG
    Claudio Perini, Carlo Rovelli, Simone Speziale
    http://arxiv.org/cits/0810.1714 (2)

    Background-free propagation in loop quantum gravity
    Simone Speziale
    http://arxiv.org/cits/0810.1978 (2)

    On the semiclassical limit of 4d spin foam models
    Florian Conrady, Laurent Freidel
    http://arxiv.org/cits/0809.2280 (9)

    Path integral representation of spin foam models of 4d gravity
    Florian Conrady, Laurent Freidel
    http://arxiv.org/cits/0806.4640 (12)

    A Lagrangian approach to the Barrett-Crane spin foam model
    Valentin Bonzom, Etera R. Livine
    http://arxiv.org/cits/0812.3456

    The Nonperturbative Quantum de Sitter Universe
    J. Ambjorn, A. Goerlich, J. Jurkiewicz, R. Loll
    http://arxiv.org/cits/0807.4481 (2)

    Bare Action and Regularized Functional Integral of Asymptotically Safe Quantum Gravity
    Elisa Manrique, Martin Reuter
    http://arxiv.org/cits/0811.3888

    Motion of a “small body” in non-metric gravity
    Kirill Krasnov
    http://arxiv.org/cits/0812.3603

    Effective Theory of Braid Excitations of Quantum Geometry in terms of Feynman Diagrams
    Yidun Wan
    http://arxiv.org/cits/0809.4464

    Quantum gravity as a Fermi liquid
    Stephon H.S. Alexander, Gianluca Calcagni
    ( http://arxiv.org/abs/0807.0225 )
    http://arxiv.org/cits/0807.0225


    I don't have a cits link for the Rovelli LQG review article but its Spires entry should eventually serve equally well.
     
    Last edited: Jan 1, 2009
  4. Jan 2, 2009 #3

    MTd2

    User Avatar
    Gold Member

    Two things:

    1. I still cannot understand what Connes theory is about.
    2. Where is the Bennedeti and Modesto's articles?!?!???

    https://www.physicsforums.com/showthread.php?t=270975
    https://www.physicsforums.com/showthread.php?t=281096

    I think these are the best ones. The first 2 have really might really have deep consequences for all mathematics and most of theories nowadays, including strings. Don't forget that CDT, whose dimensional transion is modeled by the fractal approach, worked started with non critical strings.

    I can't really vote if you do not include these 2.
     
  5. Jan 2, 2009 #4

    marcus

    User Avatar
    Science Advisor
    Gold Member
    2015 Award
    Dearly Missed

    Consider them hereby included!


    Fractal properties of quantum spacetime
    Dario Benedetti
    http://arxiv.org/abs/0811.1396

    "We show that in general a spacetime having a quantum group symmetry has also a scale dependent fractal dimension which deviates from its classical value at short scales, a phenomenon that resembles what observed in some approaches to quantum gravity. In particular we analyze the cases of a quantum sphere and of k-Minkowski, the latter being relevant in the context of quantum gravity."



    Fractal Structure of Loop Quantum Gravity
    Leonardo Modesto
    http://arxiv.org/abs/0812.2214

    "In this paper we have calculated the spectral dimension of loop quantum gravity (LQG) using simple arguments coming from the area spectrum at different length scales. We have obtained that the spectral dimension of the spatial section runs from 2 to 3, across a 1.5 phase, when the energy of a probe scalar field decreases from high to low energy. We have calculated the spectral dimension of the space-time also using results from spin-foam models, obtaining a 2-dimensional effective manifold at high energy. Our result is consistent with two other approaches to non-perturbative quantum gravity: causal dynamical triangulation and asymptotic safety quantum gravity."


    Now anyone can vote for either one or both of these (by posting on this thread indicating their choice), plus any of the others that were included in the regular poll. This is in the tradition of including votes for "write-in" candidates. There was a lot of innovative research activity this year, so I found it difficult to narrow the choices. I am glad to include your suggestions. Vote for any of the others you wish to as well.
     
    Last edited: Jan 2, 2009
  6. Jan 2, 2009 #5

    MTd2

    User Avatar
    Gold Member

    Where is the box to cast in my vote?
     
    Last edited: Jan 2, 2009
  7. Jan 2, 2009 #6

    marcus

    User Avatar
    Science Advisor
    Gold Member
    2015 Award
    Dearly Missed

    It's not possible to edit a poll so I can't put a box in for you to check. You have posted a "write-in" vote for the Benedetti and Modesto papers, so that will be counted. You can also vote for other choices on the regular poll if you wish.

    Earlier I added a paper by Stephon Alexander as a possible write-in. This paper was suggested by atyy after it was too late to include in the regular poll. As I say, there were a lot to choose from this year! :smile:

    https://www.physicsforums.com/showpost.php?p=2018765&postcount=15
    https://www.physicsforums.com/showpost.php?p=2018797&postcount=18
     
    Last edited: Jan 2, 2009
  8. Jan 2, 2009 #7

    marcus

    User Avatar
    Science Advisor
    Gold Member
    2015 Award
    Dearly Missed

    Five people have recorded their predictions so far. Thanks to all who responded!
    Besides the papers listed in the poll we have three "write-ins"


    Fractal properties of quantum spacetime (1 vote: MTd2)
    Dario Benedetti
    http://arxiv.org/abs/0811.1396

    Fractal Structure of Loop Quantum Gravity (2 votes: MTd2, marcus)
    Leonardo Modesto
    http://arxiv.org/abs/0812.2214

    Quantum gravity as a Fermi liquid (1 vote: marcus)
    Stephon H.S. Alexander, Gianluca Calcagni
    http://arxiv.org/abs/0807.0225

    ========================

    So far, as of 2 January, the front-runner is Alain Connes' paper with three votes (atyy, humanino, and yrs trly).
    So three out of the five people who have responded considered it potentially the most important or most valuable to future research.
    The responses also put the spotlight on several other papers, but I will just mention this one for now.
     
    Last edited: Jan 2, 2009
  9. Jan 3, 2009 #8

    atyy

    User Avatar
    Science Advisor

    I somehow missed seeing Yidun Wan's paper on the list, but since write in's are allowed now, I shall add to my Connes vote:

    Yidun Wan, Effective Theory of Braid Excitations of Quantum Geometry in terms of Feynman Diagrams

    Stephon H.S. Alexander, Gianluca Calcagni, Quantum gravity as a Fermi liquid
     
  10. Jan 5, 2009 #9

    marcus

    User Avatar
    Science Advisor
    Gold Member
    2015 Award
    Dearly Missed

    I want to be sure to keep track of the write-in votes. Here's a list of the papers selected so far. Votes are indicated by initials and the list has been ordered by the number received. The plus sign + indicates a write-in.

    The Uncanny Precision of the Spectral Action (a,h,m)
    Ali H. Chamseddine, Alain Connes
    http://arxiv.org/abs/0812.0165

    LQG propagator: III. The new vertex (M,m)
    Emanuele Alesci, Eugenio Bianchi, Carlo Rovelli
    http://arxiv.org/abs/0812.5018

    Path integral representation of spin foam models of 4d gravity (f,m)
    Florian Conrady, Laurent Freidel
    http://arxiv.org/abs/0806.4640

    A Lagrangian approach to the Barrett-Crane spin foam model (f,M)
    Valentin Bonzom, Etera R. Livine
    http://arxiv.org/abs/0812.3456

    Effective Theory of Braid Excitations of Quantum Geometry in terms of Feynman Diagrams (M, +a)
    Yidun Wan
    http://arxiv.org/abs/0809.4464

    Fractal Structure of Loop Quantum Gravity (+M, +m)
    Leonardo Modesto
    http://arxiv.org/abs/0812.2214

    Quantum gravity as a Fermi liquid (+a, +m)
    Stephon H.S. Alexander, Gianluca Calcagni
    http://arxiv.org/abs/0807.0225

    Loop Quantum Gravity (m)
    Carlo Rovelli
    (new review)
    http://relativity.livingreviews.org/Articles/lrr-2008-5/

    Fractal properties of quantum spacetime (+M)
    Dario Benedetti
    http://arxiv.org/abs/0811.1396

    The Nonperturbative Quantum de Sitter Universe (m)
    J. Ambjorn, A. Goerlich, J. Jurkiewicz, R. Loll
    http://arxiv.org/abs/0807.4481

    Motion of a “small body” in non-metric gravity (M)
    Kirill Krasnov
    http://arxiv.org/abs/0812.3603
     
    Last edited: Jan 5, 2009
  11. Jan 8, 2009 #10

    marcus

    User Avatar
    Science Advisor
    Gold Member
    2015 Award
    Dearly Missed

    So far 5 people registered their predictions about which 2008 papers will prove most important to future research. Here's the list of the papers that people voted for. The plus sign + indicates a write-in.

    I'll add some links to where we can eventually check for citation numbers.
    Those don't tell the whole story but do have some useful correlation with the papers' research value.

    The Uncanny Precision of the Spectral Action (a,h,m)
    Ali H. Chamseddine, Alain Connes
    http://arxiv.org/abs/0812.0165
    http://arxiv.org/cits/0812.0165

    LQG propagator: III. The new vertex (M,m)
    Emanuele Alesci, Eugenio Bianchi, Carlo Rovelli
    http://arxiv.org/abs/0812.5018
    http://arxiv.org/cits/0812.5018

    Path integral representation of spin foam models of 4d gravity (f,m)
    Florian Conrady, Laurent Freidel
    http://arxiv.org/abs/0806.4640
    http://arxiv.org/cits/0806.4640

    A Lagrangian approach to the Barrett-Crane spin foam model (f,M)
    Valentin Bonzom, Etera R. Livine
    http://arxiv.org/abs/0812.3456
    http://arxiv.org/cits/0812.3456

    Effective Theory of Braid Excitations of Quantum Geometry in terms of Feynman Diagrams (M, +a)
    Yidun Wan
    http://arxiv.org/abs/0809.4464
    http://arxiv.org/cits/0809.4464

    Fractal Structure of Loop Quantum Gravity (+M, +m)
    Leonardo Modesto
    http://arxiv.org/abs/0812.2214
    http://arxiv.org/cits/0812.2214

    Quantum gravity as a Fermi liquid (+a, +m)
    Stephon H.S. Alexander, Gianluca Calcagni
    http://arxiv.org/abs/0807.0225
    http://arxiv.org/cits/0807.0225

    Loop Quantum Gravity (m)
    Carlo Rovelli
    (new review)
    http://relativity.livingreviews.org/Articles/lrr-2008-5/
    http://www.slac.stanford.edu/spires/find/hep/www?j=00222,11,5

    Fractal properties of quantum spacetime (+M)
    Dario Benedetti
    http://arxiv.org/abs/0811.1396
    http://arxiv.org/cits/0811.1396

    The Nonperturbative Quantum de Sitter Universe (m)
    J. Ambjorn, A. Goerlich, J. Jurkiewicz, R. Loll
    http://arxiv.org/abs/0807.4481
    http://arxiv.org/cits/0807.4481

    Motion of a “small body” in non-metric gravity (M)
    Kirill Krasnov
    http://arxiv.org/abs/0812.3603
    http://arxiv.org/cits/0812.3603
     
    Last edited: Jan 8, 2009
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?