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Third quarter QG research poll: nominations

  1. Sep 3, 2006 #1

    marcus

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    the third quarter is July thru September
    by the end of this month we will have some perspective on the non-string QG research posted this quarter--or at least we'll know what was posted.

    What research do you think should be nominated for third quarter "MIP" ("most influential paper") so far?

    For concreteness here are some preprints that have appeared on arxiv since 1 July. Several are collaborations but I won't bother to say "et al." in this listing. It was a tossup between Speziale and his co-author Etera Livine, who sometimes visits PF.

    One by Freidel
    http://arxiv.org/gr-qc/0607014

    One by Speziale
    http://arxiv.org/gr-qc/0608131

    Two by Bojowald
    http://arxiv.org/gr-qc/0608100
    http://arxiv.org/gr-qc/0607130

    Five by Thiemann
    http://arxiv.org/gr-qc/0607075
    http://arxiv.org/gr-qc/0607100
    http://arxiv.org/gr-qc/0607101
    http://arxiv.org/gr-qc/0607380
    http://arxiv.org/gr-qc/0608210
     
    Last edited: Sep 3, 2006
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  3. Sep 3, 2006 #2

    marcus

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    BTW the last one in the "five by Thiemann" is the controversial survey paper
    http://arxiv.org/abs/hep-th/0608210
    Loop Quantum Gravity: An Inside View

    in case anyone is curious, here are links to the earlier MIP polls

    https://www.physicsforums.com/showthread.php?t=124951

    https://www.physicsforums.com/showthread.php?t=116791

    as far as past results go, in the first poll Gerard 't Hooft topped the list, and in the second it was a three-way tie----with John Baez (who occasionally shows up and posts here) being one of those in first place.

    For me, part of the interest is how well different people FORECAST the future significance or influence of research. In a forecast poll you can see who guessed which papers and look back and see if those papers did in fact get cited a lot in later research or had some other kind of significance.

    Like here are the names of the guessers and what they picked
    https://www.physicsforums.com/poll.php?do=showresults&pollid=817

    You can see that the smart money may, in this case, have been on Padmanabhan, even tho he didn't actually win the poll.
    Anyway try to nominate research you think actually will contribute to progress and be useful to future researchrs and get cited by them in the footnotes and so on. Good hunting!
     
    Last edited: Sep 3, 2006
  4. Sep 4, 2006 #3

    marcus

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    maybe it should be single papers, no bundles this time, and the line-up should be

    http://arxiv.org/abs/hep-th/0608210
    Thiemann Loop Quantum Gravity: An Inside View

    http://arxiv.org/abs/gr-qc/0608100
    Bojowald Large-scale effective theory for cosmological bounces

    http://arxiv.org/abs/gr-qc/0607014
    Freidel Kowalski-Glikman Starodubtsev Particles as Wilson lines of gravitational field

    http://arxiv.org/abs/gr-qc/0608131
    Livine Speziale Group Integral Techniques for the Spinfoam Graviton Propagator

    http://arxiv.org/abs/hep-th/0608221
    Barrett A Lorentzian version of the non-commutative geometry of the standard model of particle physics

    http://arxiv.org/abs/hep-th/0608226
    Connes Noncommutative Geometry and the standard model with neutrino mixing
     
  5. Sep 4, 2006 #4
    my nomination

    I think Torsten and Helge's "Calculation of the Cosmological Constant by Unifying Matter and Dark Energy" will be influential. It showed that General Relativity still has a few tricks up its sleeves.

    The Standard Model does not say much about dark matter, and nothing about dark energy, so any development in this area will be huge.
     
  6. Sep 4, 2006 #5

    marcus

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    thanks for your input Energex42,
    I'm open to lots of nominations and if I construct a poll out of it later (as we did in first and second quarters of the year) I'll probably narrow it down some.
     
  7. Sep 4, 2006 #6

    selfAdjoint

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    For me it's between Freidel Kowalski-Glikman Starodubtsev, Barrett, and Connes. They are all key papers about promising new physics.

    Ummmmmm..... Connes, mostly because of the name, and because he claims he can do neutrino mixing, whih is pretty damn good for a (sort of) first principles theory. It's all about what will attract the attention of bright followers.
     
  8. Sep 24, 2006 #7

    marcus

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    There are several excellent papers to choose from in the 3rd quarter, but I suspect a landslide favorite. In any case here is what we have. Is everyone happy with this range of choices? Any others to suggest?

     
  9. Sep 26, 2006 #8

    Chronos

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    I have one more in mind:

    Towards Quantum Gravity: A Framework for Probabilistic Theories with Non-Fixed Causal Structure
    http://arxiv.org/abs/gr-qc/0608043
    Authors: Lucien Hardy

    The author is definitely a newcomer having submitted only two papers to date - the other, a related treatise, appeared earlier this year.
     
  10. Oct 2, 2006 #9

    marcus

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    I've made some fairly arbitrary choices to narrow the field down.


    A. Barrett and Connes

    These two are listed together, since Barrett and Connes arrived at the same result at the same time.

    http://arxiv.org/abs/hep-th/0608221
    A Lorentzian version of the non-commutative geometry of the standard model of particle physics
    Barrett

    http://arxiv.org/abs/hep-th/0608226
    Noncommutative Geometry and the standard model with neutrino mixing
    Connes

    B. Freidel et al

    http://arxiv.org/abs/gr-qc/0607014
    Particles as Wilson lines of gravitational field
    Freidel, Kowalski-Glikman, Starodubtsev
    19 pages, to be published in Phys. Rev. D

    "Since the work of Mac-Dowell-Mansouri it is well known that gravity can be written as a gauge theory for the de Sitter group. In this paper we consider the coupling of this theory to the simplest gauge invariant observables that is, Wilson lines. The dynamics of these Wilson lines is shown to reproduce exactly the dynamics of relativistic particles coupled to gravity, the gauge charges carried by Wilson lines being the mass and spin of the particles. Insertion of Wilson lines breaks in a controlled manner the diffeomorphism symmetry of the theory and the gauge degree of freedom are transmuted to particles degree of freedom."

    C. Gambini et al

    http://arxiv.org/abs/quant-ph/0608243
    Relational physics with real rods and clocks and the measurement problem of quantum mechanics
    Rodolfo Gambini, Jorge Pullin
    19 pages

    "The use of real clocks and measuring rods in quantum mechanics implies a natural loss of unitarity in the description of the theory. We briefly review this point and then discuss the implications it has for the measurement problem in quantum mechanics. The intrinsic loss of coherence allows to circumvent some of the usual objections to the measurement process as due to environmental decoherence."

    D. Smolin

    http://arxiv.org/abs/quant-ph/0609109
    Could quantum mechanics be an approximation to another theory?
    Lee Smolin
    10 pages

    "We consider the hypothesis that quantum mechanics is an approximation to another, cosmological theory, accurate only for the description of subsystems of the universe. Quantum theory is then to be derived from the cosmological theory by averaging over variables which are not internal to the subsystem, which may be considered non-local hidden variables. We find conditions for arriving at quantum mechanics through such a procedure. The key lesson is that the effect of the coupling to the external degrees of freedom introduces noise into the evolution of the system degrees of freedom, while preserving a notion of averaged conserved energy and time reversal invariance.
    These conditions imply that the effective description of the subsystem is Nelson's stochastic formulation of quantum theory. We show that Nelson's formulation is not, by itself, a classical stochastic theory as the conserved averaged energy is not a linear function of the probability density. We also investigate an argument of Wallstrom posed against the equivalence of Nelson's stochastic mechanics and quantum mechanics and show that, at least for a simple case, it is in error."
     
  11. Oct 2, 2006 #10
    I voted Freidel's paper b/c it could give Bilson's ribbons preons a more concrete theoretical basis and allow calculations for particle masses from first principles. Spin and mass-energy and 2nd/3rd generations seem to be unaccounted for with the current preon models. I've suggested Yershov ground his preons in similar models. Also, a concrete derivation of charge of e/3 based on spinfoam would be highly desirable.
     
    Last edited: Oct 2, 2006
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