So, you'll have to forgive me, but I am an engineer, not a physicist, but I take an interest in quantum gravity. My understanding is primarily conceptual, not mathematical. So if my question is dumb, I apologize. Ok, here goes:
I'm aware of Zwi Bern's conjectured color-kinematics duality...
Another important paper:
An Estimate of Λin Resummed Quantum Gravity in the Context of Asymptotic Safety
B.F.L. Ward (1) ((1) Department of Physics, Baylor University, Waco, TX, USA)
(Submitted on 5 Aug 2010 (v1), last revised 18 Oct 2010 (this version, v3))
We show that, by using recently...
Anyone have any thoughts on BFL Ward's work? He claims to have found a perturbatively renormalizable QG theory by using a resummation method. By treating the cosmological constant as a coupling constant, he was able to derive its observed value (or very close to it). There are connections to...
Sound is an emergent phenomenon in condensed matter systems- it is not a fundamental phenomenon like electromagnetic radiation. Sound itself can be thought of particles representing the quanta of sound waves, which are scalar field quanta known as phonons.
The phonon field itself represents...
Another paper that might be somewhat relevant:
http://arxiv.org/abs/1104.4543"
The bottom paragraph on page 14 is particularly relevant.
And yet another on N=4 Twistor Yang Mills:
http://arxiv.org/abs/1104.2605"
I think it's an ill-posed question. String is more of a theory of theories. There is no one unified string theory. There are many stringy models with different properties. This is like asking if gauge theory or quantum field theory is wrong or disprovable.
As for the dynamical degrees of...
I suppose that is a pragmatic point to take- not to single out a specific theory out as fundamental and treat them as different mathematical means of treating the same physical phenomena (at least in some cases). Despite my non-expertise I think this is reasonable- LQG and String will likely...
I've been ruminating over an idea that's been floating around in my head for a few weeks. My understanding of theoretical physics is lacking compared to many of the members of this fine establishment, so I'm curious to hear the thoughts of someone more knowledgeable than myself.
In asymptotic...
Maybe this would mesh with the asymptotically safe gravity program. As 't Hooft specifically identifies the need for fixed points at which the constants stabilize, this is suggestive of a similar structure to that which is studied in the asymsafe program.
It's actually strange that you mentioned this- I answered a similar question on the HEP section yesterday. RS models are AdS/CFT related to some technicolor QFT models. In the RS theories, there are 5 dimensions, however, only the graviton propagates in the 5th dimension. The geometry of the...