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

Aug2014 11:17 AM
marcus

68 
66,553 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Jul1412 08:32 AM
ZapperZ

1 
26,579 
Spin networks describing BH have a central node with label taken from an intertwiner Hilbertspace of high dimension...

Jul2710 07:00 PM
atyy

4 
2,166 
In analog models of gravity, such as acoustic metric theory, the motion of "matter" is influenced by the metric....

Jul2710 05:43 PM
Argonaught

2 
1,175 
Thus far Tevatron and possibly LHC has found no evidence of SUSY, and DM searches thus far null and void. Steinhardt...

Jul2610 07:45 AM
ensabah6

8 
7,963 
Would it make sense to think of excitations of a node as it they were made of particles of spin occupying states just...

Jul2610 06:45 AM
Fra

17 
3,244 
What can we learn, if anything, from how the organizers of the ICHEP chose to represent the growing research activity...

Jul2510 10:39 PM
marcus

8 
1,938 
I do not think that the following was presented as a live video.
...

Jul2510 05:35 PM
jal

1 
1,071 
regarding the problem of time in QG,
Is time absolute or dynamical in LQG?
string theory?
How does LQG and...

Jul2510 05:16 PM
ensabah6

7 
1,700 
I have only taken a few college physics courses, and I have watched some videos about string theory. I would like to...

Jul2510 01:41 AM
rai linga

13 
6,315 
LQG research is having what looks like a "heyday". A rush of papers that fit the various pieces of the puzzle...

Jul2410 06:43 PM
marcus

2 
1,439 
Hey there PF, as you can see I am newly registered here, but I have been floating around for a little while now...

Jul2410 05:45 PM
Baraccus

6 
1,256 
http://arxiv.org/abs/1006.0199
From twistors to twisted geometries
Laurent Freidel, Simone Speziale
9 pages...

Jul2310 06:15 PM
MTd2

3 
1,489 
Hi,
I have a short question about gauge theories and constraints. Imagine I have a symmetry algebra, and I gauge...

Jul2310 04:59 PM
torquil

1 
1,103 
Does anyone know where I can find the lagrangian for this?
From memory I believe it looks something like
S =...

Jul2310 11:53 AM
jdstokes

3 
1,126 
In classical general relativity it is known that angle of deflection is proportional to radius1 from the center of...

Jul2310 10:38 AM
exponent137

1 
835 
I don't know if it is the correct subforum, if I choose wrong then feel free to move the thread.
I was listening...

Jul2310 06:54 AM
xepma

3 
1,805 
The question I want to ask is pretty much in the title: Why is string theory becoming less of an excitement amongst...

Jul2210 10:07 AM
MTd2

50 
6,911 
Here is a new LQG resource site.
http://sites.google.com/site/quantumgravitytheory/
I hope it will be useful.

Jul2110 11:00 PM
SuperStringboy

2 
1,092 
Hi,
I read (e.g. in these lecture notes http://web.mit.edu/~mcgreevy/www/fall07/psets/pset04.pdf page 4) that the...

Jul2110 05:23 PM
GargleBlast42

0 
1,559 
Could the correspondence be proven along the lines suggested by Laurent Freidelone of the leaders in LQG research?...

Jul2110 12:17 PM
marcus

2 
1,526 
I've read that the discovery of gravitational waves will further support the big bang theory at the expense of...

Jul2110 07:29 AM
Naty1

5 
3,348 
if in General Relativity the main issue is that 'space is curved' what is the equivalence of it in Quantum mechanics...

Jul2010 02:56 PM
George Jones

1 
931 
Has it ever been demonstrated convincingly that supergravity gives you GR in the continuum limit (as opposed to just...

Jul1910 11:17 PM
Haelfix

3 
1,443 
The neutralino is the lightest supersymmetric stable particle, and is a good dark matter candidate. Some theories like...

Jul1910 07:48 PM
Haelfix

12 
2,885 
I’ve been starting to look at how LQG works, and if I’ve understood it correctly, just thinking about the kinematics,...

Jul1910 08:27 AM
atyy

9 
1,205 
Hi PF members
IN Branes theory There are extreme Branes or Bound Branes ?

Jul1910 06:43 AM
big_bounce

0 
691 
It is well known to mathematicians that the study of topology in 4dimensions is more difficult than in higher...

Jul1810 02:33 AM
BruceG

3 
1,744 
A hyperspace (faster then c) engine is being worked on by the U.S. It would work by going into another dimension based...

Jul1610 10:44 AM
Dr_Zinj

54 
34,882 
wikipedia says
http://en.wikipedia.org/wiki/Group_field_theory
Overview
Group field theory is a theory of...

Jul1410 12:49 AM
atyy

3 
1,631 
These values are due quantization of space time with 4 or more dimensions. But there is a catch here. There is no...

Jul1310 12:05 PM
MTd2

18 
2,337 
Can we learn anything about the status of QG phenomenology by checking out the abstracts for the July talks?
Bee...

Jul1210 10:51 AM
marcus

3 
1,897 
My impression was that much of the 2009 interest in Horava gravity had waned. A number of problems with it were...

Jul1110 07:29 PM
marcus

0 
1,349 
A view of reality emerging from current LQG research (like 1004.1780) is somewhat analogous to the "seething vacuum"...

Jul1110 06:57 PM
marcus

14 
2,352 
http://arxiv.org/abs/1007.1317
Black holes in an asymptotically safe gravity theory with higher derivatives
YiFu...

Jul1110 05:02 PM
Finbar

19 
2,719 
Has these results been extended to nonextremel BH?
Do they work when the cc is +, (deSitter) and where SUSY is...

Jul810 01:56 PM
Ben Niehoff

1 
1,421 
I was just reading Forbes' list of the world's most influential thinkers, and the profile on Ed Witten mentioned how...

Jul810 10:53 AM
atyy

11 
3,086 
If TeV scale supersymmetry turns out to be true, with Rparity conservation it has been argued the lightest...

Jul710 05:57 PM
hamster143

2 
1,092 
Of these fifteen candidates, please indicate the paper or papers which you think will contribute most significantly to...

Jul610 10:42 PM
atyy

20 
4,819 
Based on Maxwell's equations, a physicist suggests that there should be a way to have a transformer to stepup or...

Jul610 01:51 PM
Naty1

4 
1,410 
I have read the papers of Verlinde, Jacobson, Beckenstein, Smoot and many other. They use the Unruh vacuum. It seems...

Jul510 03:36 AM
czes

29 
3,119 
Hi,
this is not based on detailed work but just an idea which arised comparing causal dynamical triangulations and...

Jul210 10:24 AM
tom.stoer

6 
1,588 