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

Sep1514 12:03 AM
marcus

72 
67,903 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Jul1412 08:32 AM
ZapperZ

1 
26,925 
we sway into scifiction which i want to be realistic:
How is it inside Subspace or Hyperspace or a cosmic string...

Jan3110 02:14 PM
Naty1

1 
1,371 
Hi!
That's my first thread and I apologize for my bad English, but there's a question in my mind that makes me...

Jan3110 08:00 AM
Tack

5 
1,754 
Can every QFT/CFT be interpreted at least approximately as a theory of gravity? If not, is it known which QFT/CFTs...

Jan3010 12:31 PM
Physics Monkey

7 
1,618 
I know the main points of string theory, but can someone tell me where the evidence is that it could be true?

Jan3010 08:42 AM
arivero

29 
3,130 
Hi everybody,
I would like to chat about the physics of loop quantum cosmology. Let me list a few broad topics I'm...

Jan2910 02:30 PM
marcus

19 
2,796 
In a spacetime with a black hole, where is the horizon in the CFT?
Also, if a black hole spacetime corresponds to a...

Jan2910 09:54 AM
Physics Monkey

4 
1,880 
I try to check the calculation that Kaluza and Klein originally did. It is in the first pages of Pope's lecture notes:...

Jan2910 04:56 AM
DailyMather

1 
2,290 
Does the theory say that an electron is a single vibrating string? How many parameters are needed to describe that...

Jan2810 11:36 AM
bapowell

1 
938 
In string theory, a solution involving flat 10D space seems like a valid solution. The Universe could be described by...

Jan2610 04:35 PM
arivero

2 
2,138 
It could be worthwhile to head a thread with some explanation about why D=11 is predictive, or perhaps to debate if it...

Jan2610 10:51 AM
arivero

9 
2,607 
These are posts from the bibliography thread (which has enough to do just listing the new papers, without discussing...

Jan2610 02:50 AM
czes

12 
1,871 
The most recent version of the theorem, as stated by Nikonorov in 2004
Let G a connected compact semisimple Lie...

Jan2310 10:48 AM
arivero

2 
1,639 
Hello all,
I'm just wondering, have physicists come up with an accepted theory for quantum gravity?

Jan2310 02:25 AM
tom.stoer

4 
1,346 
Hello everybody
I noticed here are people knowing Loop Quantum Gravity. I am not a professional physicist but I like...

Jan2210 11:18 AM
czes

12 
2,147 
I already tried this some month ago:
Is there a list (paper, website, ...) of SUGRA theories containing the...

Jan2210 07:39 AM
arivero

21 
2,350 
In general relativity we assume that connection is torsion free. However from a purely geometrical viewpoint, the...

Jan2210 01:10 AM
tom.stoer

5 
1,864 
what problems are solved by the theory of 11 different dimensions instead of just 14 proposed in the m theory and...

Jan2210 12:23 AM
clm321

10 
1,687 
Before I go and ask questions that many of you might be able to answer very easily, I'm letting everyone know that I...

Jan2110 01:40 PM
arivero

7 
1,467 
If we start with minkowski spacetime in 4 dimensions and then add several curled up spatial dimensions attached at...

Jan2110 08:34 AM
arivero

2 
959 
In string theory, what are the fundemental properties of a string?
Is the tension in the string a constant at all...

Jan2110 08:15 AM
arivero

5 
1,600 
Hi there,
I 've recently looked at how the NambuGoto action of an open string can be derived from the proper area...

Jan1910 04:07 PM
tom.stoer

2 
1,838 
i don't know much about strings and branes, but i'm under the impression with branes there could be other universes...

Jan1710 07:21 PM
matt010nj

20 
5,553 
I thought I started a thread on this topic, but than I could not find it when I looked later, so here goes again. I...

Jan1710 04:47 PM
Finbar

1 
1,039 
Can someone please explain the holographic principle to me?
I'm decent in my physics and math, so you don't need...

Jan1610 10:17 AM
Finbar

16 
3,748 
Ilja Schmelzer, the author of
http://arxiv.org/grqc/0205035
just introduced himself in one of the Philosophy...

Jan1510 09:33 AM
Vanadium 50

21 
4,294 
Hello all.
I am currently reading 'The Elegant Universe' and I'm puzzled by one key thing that is really starting...

Jan1510 03:35 AM
Fra

6 
1,671 
To be more specific I mean the 3 familiar spacial dimensions not extra ones(unless I guess they are large enough for...

Jan1410 04:03 AM
arivero

5 
2,022 
In this text is explained why our universe exists and why there are nature’s laws.
The explanation is given in two...

Jan1310 11:39 AM
pbrane

1 
1,296 
Has anybody studied this paper?
http://arxiv.org/abs/0909.0212v4
Comprehensive Solution to the Cosmological...

Jan1310 11:31 AM
pbrane

6 
2,495 
The logic of spin2 gravitons is that GR predicts gravitational waves, and in QM, all waves are also particles.
...

Jan1210 02:43 AM
arivero

21 
3,889 
In the news there is a lot of "past 10 years", from Bush v.s Gore and 911, to Iraq and electing first Black...

Jan810 12:21 AM
marcus

1 
1,092 
Since there are several people here who intently follow the developements of LQG, I was wondering if someone could...

Jan710 11:25 PM
marcus

12 
2,454 
Three new papers appeared this week which strongly reinforce the Loop program.
1. The Ashtekar Sloan paper shows...

Jan710 10:34 PM
ensabah6

13 
2,146 
If I'm correct in thinking the universe is made up of one dimensional strings: a) what do the stings in the normal 3...

Jan710 02:45 PM
Pjpic

0 
1,053 
Strings live in 9+1 world, M, 10+1
one line of criticism is string theory is unable to account for the number of...

Jan710 10:07 AM
arivero

20 
2,784 
It is my understanding that in string theory, loop quantum gravity, the 'asymptotic safety' approach, and in...

Jan610 04:21 AM
tom.stoer

5 
2,708 
We will get a chance to gauge the progress in LQGhow far along they are in dealing with the main outstanding...

Jan610 04:15 AM
tom.stoer

5 
1,751 
I've heard a lot about AdS/CFT lately as an approach to solve strongly coupled field theories such as QCD and...

Jan610 04:04 AM
tom.stoer

5 
2,340 
Can anyone help me with explaining what is Brane Tension (t_3)
I'm reading an article on cosmology, and I need to...

Jan510 05:53 AM
Chalnoth

3 
1,934 
what odds do you guys give the L8 theory of everything being correctly proven at the LHC?

Jan410 02:21 PM
cary cato

0 
1,215 