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

Apr1214 02:54 PM
marcus

59 
46,131 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Jul1412 08:32 AM
ZapperZ

1 
22,325 
I am confused about the definition of ground state and its characteristics. For a field in spacetime do we mean the...

May2410 02:18 AM
tom.stoer

1 
915 
I remember an article on String Theory on either Popular Science or Scientific America, and it had this equation:
...

May2310 03:39 PM
Ben Niehoff

10 
1,750 
I got some spare time to glance at arxiv:1004.0464v1
Section 9.2 is awesome. It tells us that the discrete algebras...

May2210 05:04 PM
arivero

2 
1,543 
Friends:
I have studied extensively John Moffats work on MOG, mostly in its newest form of SVTG or scalar vector...

May2210 03:16 PM
emc2cracker

0 
1,012 
If, according to Einstein, that spacetime is a "fabric", could there be waves in this "fabric"?

May2110 09:39 PM
brainstorm

6 
1,281 
http://arxiv.org/abs/1004.1780
A new look at loop quantum gravity
Carlo Rovelli
15 pages, 5 figures
(Submitted on...

May2010 11:37 PM
marcus

14 
4,058 
Hello, I am intrested in finding out about string theory. I have done reasearch on the internet but that is the...

May2010 07:44 AM
bapowell

3 
1,190 
Greetings. My question comes in two parts.
Part one  In most "lowlevel  made for t.v." explanations of the...

May1910 03:07 PM
Noja888

8 
2,730 
http://pirsa.org/10050002/
Deformations of General Relativity
Kirill Krasnov
20100505
"I will describe a very...

May1810 07:56 PM
Finbar

8 
1,698 
From what I've read earlier, the definition of a BPS soliton is a soliton satisfying a Bogomolny bound (mass bounded...

May1810 06:38 PM
suprised

1 
1,089 
http://pirsa.org/10050022/
The Emergence of Gravity
Erik Verlinde
12/05/2010
"Theoretical insights originated from...

May1810 02:39 AM
Fra

6 
5,588 
The observed expansion of the Universe is an example of the Holographic Principle. The galaxies escape from us not...

May1810 01:05 AM
czes

1 
1,338 
IMHO this is an elegant 4page gem. Check it out.
http://arxiv.org/abs/1005.2985
Thermal time and the...

May1810 12:39 AM
marcus

1 
3,590 
Is string theory the replacement of the zeroth dimension? Or could it be thought of as such?

May1710 02:14 PM
bradley613

6 
1,501 
It's possible someone else slipped this into arxiv, as an April foolery, pretending it was by Smoot. You have to...

May1710 12:38 PM
marcus

18 
3,060 
I'm looking at this thread, http://www.physicsforums.com/showthread.php?t=403472
Dark Matter, On the Ropes?
...

May1710 12:01 PM
ensabah6

4 
1,833 
This might sound crazy , but could a magnetic field exchange gravitons with something
else , or can a magnetic...

May1610 12:10 AM
cragar

3 
1,134 
Sometimes I wonder if LQG is as much of a "failure" as string theory, with string theory inability to dimensionally...

May1410 03:40 PM
fh

2 
1,204 
http://www.nature.com/news/2007/071220/full/news.2007.389.html
this just came out in Nature News, comment?
To...

May1410 02:36 PM
SdogV

19 
3,771 
Henderson gives a good talk. He's been working with Abhay Ashtekar on reformulating loop cosmology as a spinfoamlike...

May1310 11:08 PM
marcus

0 
878 
Verlinde has proposed to express gravity as a thermodynamic system, whereas Connes shows with a purely geometric...

May1310 05:40 AM
Fra

8 
1,952 
Since it is the case in classical physics, I had always thought that objects with different mass acted the exact same...

May1210 10:17 PM
LukeD

5 
1,284 
I would like your comments on whether a model of EPR entanglement based on superstring theory makes any sense.
...

May1210 08:01 PM
Noja888

13 
4,531 
Hi everyone,
to give a motivation for studying specific models of noncommutative geometry, I would like to start...

May1010 08:38 AM
Orbb

2 
879 
Hello,
Could somebody please point me out introductory online book/paper with which I can start understanding gauge...

May910 01:51 AM
tom.stoer

2 
2,172 
The workshop involved some top people including Mathilde Marcolli (longtime coauthor with Alain Connes), Jerzy...

May710 09:25 AM
MTd2

4 
1,787 
http://arxiv.org/abs/1004.2260
The new vertices and canonical quantization
Sergei Alexandrov
(Submitted on 13...

May610 01:48 PM
MTd2

27 
3,612 
are null to 90%
If, as in searches for proton decay, the results continue to be null for experiments in the next...

May510 10:52 PM
nicksauce

1 
1,214 
Like phonons?
Even if SF is a random lattice, there might be modes emerging from some space of phase space.
Look...

May510 06:01 PM
tom.stoer

9 
1,779 
When people refer to the notorious "10^500" solutions of string theory, they are talking about possible different...

May410 05:50 PM
petergreat

0 
1,334 
If there is a black hole in the 4th dimension, how will it looks like in the observer in 3rd dimension?

May410 04:58 PM
??????????

3 
5,622 
Hello everyone,
I have been interested by the String Theory and the MTheory for quite a few years now, I read the...

May410 07:10 AM
julz

7 
1,617 
Hi,
has anybody studied the papers from Eyo Eyo Ita III?
E.g. recently
http://arxiv.org/abs/0805.4004v3...

May310 07:12 PM
MTd2

12 
3,140 
Is there a temperature related to the cosmological constant?
As I understand it, the cosmological constant is...

May310 03:23 PM
mathman

3 
1,216 
I'm just trying to get a few things straight as I delve into the world of quantum physics and string theory. First of...

May310 12:23 PM
Fra

4 
2,303 
How does LQG work? I know there are gravitons in it but how do they interact with spacetime?
Why is it a theory of...

May210 11:51 PM
tom.stoer

14 
1,948 
I am reading Zwiebach's 'a first course in string theory' and I have a question. As an example of a solution to the...

May210 11:15 AM
benbenny

1 
1,633 
I missed this point when looking at KK theories. If the D=11 graviton has 44 components, and the D=4 graviton has 2...

May210 07:28 AM
arivero

0 
663 
http://arxiv.org/abs/1004.4866
Unification of gravity, gauge fields, and Higgs bosons
A. Garrett Lisi, Lee...

Apr2910 11:48 PM
MTd2

11 
3,194 
http://arxiv.org/abs/1004.4866
Unification of gravity, gauge fields, and Higgs bosons
A. Garrett Lisi, Lee Smolin,...

Apr2710 07:20 PM
marcus

0 
1,503 