Padmanabhan holographic gravity (Paris last week)

  • Thread starter marcus
  • Start date
  • #26
selfAdjoint
Staff Emeritus
Gold Member
Dearly Missed
6,786
7
http://arxiv.org/abs/gr-qc/0412068, "From Gravitons to Gravity: Myths and Reality" was the paper I sited in the thread about gravitons and that someone later posted had been invalidated by something on the order of a missed sign. I wonder if there is any citation for that claim. Following the arxiv cited by chain didn't turn up any such refutation.
 
Last edited:
  • #27
marcus
Science Advisor
Gold Member
Dearly Missed
24,738
785
selfAdjoint said:
http://arxiv.org/abs/gr-qc/0412068, "From Gravitons to Gravity: Myths and Reality" ... I wonder if there is any citation for that claim. Following the arxiv cited by chain didn't turn up any such refutation.
Yes! that's putting a point to the doubts I had in mind about that rumor.
We got a hearsay that there was something wrong with what Padma was saying and that this had something to do with the paper being (withdrawn? or turned down? or anyway for some reason) not published.

but I havent seen anything about the rumored error in the form of something definitive I can link to. has something come by us here at PF that I missed?

and Padma keeps on saying this and is publishing this new paper that references the other, unpublished, so I think it needs sorting out. it isnt clear to me that Padmanabhan is either out of line or not out of line about this thing.
 
  • #28
ohwilleke
Gold Member
1,498
398
selfAdjoint said:
http://arxiv.org/abs/gr-qc/0412068, "From Gravitons to Gravity: Myths and Reality" was the paper I sited in the thread about gravitons and that someone later posted had been invalidated by something on the order of a missed sign. I wonder if there is any citation for that claim. Following the arxiv cited by chain didn't turn up any such refutation.
This is my recollection as well.
 
  • #29
marcus
Science Advisor
Gold Member
Dearly Missed
24,738
785
I also remember someone posting about that, here at PF. Maybe whoever it was will return to the matter and tell us something more substantive, perhaps provide an email contact or source link.
 
  • #30
412
45
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.
 
  • #31
marcus
Science Advisor
Gold Member
Dearly Missed
24,738
785
garrett said:
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.
 
Last edited:
  • #32
selfAdjoint
Staff Emeritus
Gold Member
Dearly Missed
6,786
7
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.
 
Last edited:
  • #33
marcus
Science Advisor
Gold Member
Dearly Missed
24,738
785
selfAdjoint said:
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
 
Last edited:

Related Threads on Padmanabhan holographic gravity (Paris last week)

  • Last Post
Replies
3
Views
3K
Replies
5
Views
2K
Replies
7
Views
2K
  • Last Post
Replies
17
Views
5K
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
9
Views
5K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
16
Views
5K
  • Last Post
Replies
3
Views
5K
Top