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Jul1412 08:32 AM
ZapperZ

1 
25,507 
This sticky is for announcements of pertinent scientific events, such as conferences, seminars, or public talks. This...

Jun2814 05:03 PM
marcus

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61,322 
"the programme for the consistent canonical part of the quantization of fourdimensional Einstein’s general realtivity...

Jul2811 08:00 PM
marcus

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7,270 
Spin of a 1form (e.g. electromagnetic field) is 1.
What is the spin of a pform?
(My first guess is p, but I know...

Jul2811 03:28 AM
Demystifier

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5,343 
Kempf gave a talk on this. I'll find the PIRSA link. I remember watching the whole video and being impressed. It may...

Jul2911 05:17 PM
Naty1

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4,559 
Freidel will be giving a talk in the online seminar ILQGS, about Relative Localitythe subject of this paper:
...

Aug1211 02:41 AM
John86

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11,130 
I am interested in going down that path, and i was wondering if you have any advice? I mean like which schools i...

Aug211 12:24 PM
unusualname

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5,007 
Hi there PF :)
Are there currently any physical theories trying to get rid of time, since time is not actually a...

Jul3011 02:02 AM
Fra

14 
3,766 
In the following equation:
Γ^i ψ
Does psi refer to the wavefunction? If not what does it refer to?
Also, is i...

Jul3011 03:49 AM
dimension10

6 
5,573 
There was a discussion of what "AdS/LQG" could be, two months ago. Today, while puzzling over the appearance of...

Aug311 05:28 AM
mitchell porter

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5,830 
I would like to have a glimpse of understanding of grand unificaction and all that.
But before that, of course I...

Jul2711 12:49 PM
Lapidus

22 
3,958 
Hi there PF
I have been thinking about Verlinde's entropic gravity in relation to AdS/CFT. In Verlinde's gravity,...

Jul2611 04:25 AM
mitchell porter

18 
5,049 
I chanced upon an argument in Misner, Thorne and Wheeler to the effect that the energy/momentum of the gravitational...

Jul2111 12:52 AM
tom.stoer

12 
2,775 
Could however the quantum gravity works itself be the solution to the measurement problem?
I'm not talking about...

Jul2311 11:34 PM
dhillonv10

6 
1,799 
Hi PF
I was wondering about the problem of quantum gravity, and maybe the reason why we struggle so much with a...

Jul2111 12:25 PM
dhillonv10

1 
1,495 
I tried to ask Tommaso Dorigo and he doesn't know how to answer. So, it is something very nonconventional and so it...

Jul2511 07:04 PM
MTd2

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2,608 
Are there any theories of quantum gravity that don't incorporate gravitons?

Jul2411 03:31 PM
Finbar

13 
2,751 
I was reading the Scientific American latest edition and it was claimed that everything within the boundary of a...

Aug1011 08:14 AM
geordief

8 
3,325 
Hi,
There is clearly an analogous relationship between YangMills theories and LQG, for example the covariant...

Jul2611 12:00 PM
marcus

11 
2,708 
It now looks like the Immirzi parameter has a critical value which is determined numbertheoretically, not by the...

Jul2711 10:23 PM
atyy

4 
1,983 
In http://arxiv.org/abs/1010.1939, Eq 26 & 27, Rovelli used 2 limits to define the current spin foam models. But he...

Aug1211 10:30 AM
marcus

20 
4,525 
Anyone have any thoughts on BFL Ward's work? He claims to have found a perturbatively renormalizable QG theory by...

Jul2911 03:24 PM
marcus

4 
2,309 
Hi, I am looking for parts IV and V of the series of articles called "Momentum Maps and Classical Fields", these parts...

Jul3011 10:20 PM
garrett

4 
1,733 
E_p = \sqrt{\frac{\hbar c^5}{G}}
But in many theories, like QEG, the G runs to infinity. So, actually, it should...

Aug611 01:25 AM
MTd2

16 
3,395 
arXiv:1108.0079
Gravitational wave generation in loop quantum cosmology
Paulo M. Sá, Alfredo B. Henriques
...

Aug211 07:51 AM
wolram

0 
1,399 
I was reading a gauge field theory book and was told to refer to Quigg's Gauge Theories of the Strong, Weak, and...

Aug311 10:06 AM
qaok

1 
1,801 
Sorry if this has already been discussed, i couldn't find any thing.
arXiv:1108.0893 (crosslist from grqc)
...

Aug611 01:33 PM
marcus

2 
2,303 
I am currently trying to read through Garret Lisi's paper, An Exceptionally Simple Theory of Everything, and am having...

Aug411 05:05 PM
Ben Niehoff

1 
1,944 
http://arxiv.org/abs/1108.0868
A critical look at strings
Authors: Carlo Rovelli
(Submitted on 3 Aug 2011)...

Aug1511 12:25 AM
Fra

44 
9,219 
I know that in general the arrow of time does not itself reverse but is it possible for there to exist 'observers' in...

Aug811 02:16 AM
Fra

7 
2,945 
If the Ghosh Perez result (http://arxiv.org/abs/1107.1320 ) on BH entropy is sustained the Immirzi gamma is free to be...

Aug2311 06:57 AM
Physics Monkey

5 
2,685 
As John Bell showed us a particle is not in a spin state until we measure it. So would a Graviton always be in a...

Aug911 02:01 PM
Vanadium 50

4 
2,195 
Hi PF
I was wondering, if Hawking radiation could have a different source than blackbody radiation. I was...

Aug1311 05:42 AM
mitchell porter

6 
3,147 
That is the title of a 2002 paper by Balachandran Sathiapalan, who has been writing on this topic for 20 years.
I...

Aug1311 11:48 PM
mitchell porter

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2,698 
Hello, this question will essentially concern quantum field theory in curved spacetime, and it has two parts to it.
...

Aug1511 11:23 PM
femtofranco

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3,350 
Hi guys i'm new here. I've got a lot of spare time at the moment so i was thinking of delving into physics a bit more....

Aug1911 01:45 AM
jtbell

6 
3,183 
Hi,
I was wondering if anyone who really understands black hole complementarity can answer some questions for me.
...

Aug1911 04:39 AM
Fra

9 
2,645 
Hello, I am reading up on QFT in curved spacetimes, and am aware that states of QFT's in such spacetimes, have, in...

Aug1811 12:17 PM
femtofranco

3 
2,690 
I know that the physical meaning of SU3 and SU2  you can change the places of the quarks or/and leptons and you will...

Aug2011 02:37 AM
lpetrich

2 
1,745 
Hi,
I've developed a game, or some may say tool, that aids in the conceptualization and visualization of movement...

Aug2011 07:35 PM
indydev

0 
1,926 
Someone can helpme finding the number of degree of freedom for supergravity n=8?

Aug2211 09:15 AM
kdbnlin78

1 
1,787 
An impressive series of papers was just posted by Diana Kaminski
http://www.math.unihamburg.de/home/kaminski/
We...

Aug2411 05:27 AM
francesca

4 
2,515 