Padmanabhan holographic gravity (Paris last week)

[marcus]

I just arrived at Padmanabhan's paper (and this thread) through reading this related article by Sotiriou:
http://arxiv.org/abs/gr-qc/0603096

I concur with Fabien Besnard's assessment: WOW

Einstein's equations come from the surface term action and diffeomorphism invariance. This is very deep, and it's going to have some fascinating implications.

I believe there's more about that here
http://arxiv.org/abs/astro-ph/0603114
Dark Energy: Mystery of the Millennium
T.Padmanabhan
Updated version of the Plenary talk at Albert Einstein Century International Conference at Palais de l'Unesco, Paris, France, 18-23 July, 2005; to appear in the Proceedings; AIP style files included; 16 pages; 2 figs
"...Several curious features of a universe with a cosmological constant are described and some possible approaches to understand the nature of the cosmological constant are reviewed. In particular, I show how some of the recent ideas, related to a thermodynamic route to gravity, allow us to: (i) create a paradigm in which the bulk value of cosmological constant is irrelevant and (ii) obtain the correct, observed, value for the cosmological constant from vacuum fluctuations in a region confined by the deSitter horizon."

You may already have seen that, but i mention it just to make sure.

 

[selfAdjoint]

Marcus, I think that Padmanabhan's dark energy paper astro-ph/0603114, even though much of it is an exposition of his earlier work, may be the most important physics paper, and not just in astrophysics or cosmology, of the year. Just the insight that every observer has a horizon, and every smooth surface can be someone's horizon is tremendously enlightening.

I think you're going to see citations on it coming out for a long time.

 

[marcus]

Marcus, I think that Padmanabhan's dark energy paper astro-ph/0603114, even though much of it is an exposition of his earlier work, may be the most important physics paper, and not just in astrophysics or cosmology, of the year. Just the insight that every observer has a horizon, and every smooth surface can be someone's horizon is tremendously enlightening.

I think you're going to see citations on it coming out for a long time.

coming from you that means a lot to me----experience, intuition good sense and all.

i will take a closer look at this one.

BTW I see that the paper is a reworking of the talk he gave last summer at the Paris einstein centennial----and it was that Paris talk which Fabien Besnard blogged about, in July or whenever it was, and I think first said WOW.
have to go out, back later