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

Apr1214 02:54 PM
marcus

59 
45,889 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Jul1412 08:32 AM
ZapperZ

1 
22,264 
What is a current status of this problem?
Is it fair to say that no singleuniverse theories (LQG, for example)...

Nov2409 02:38 PM
Dmitry67

0 
1,432 
Just a thinking... is S1/Z2 the same orbifold than S2/S1? If so, what is, from the point of view of Mtheory...

Nov2409 12:56 PM
arivero

0 
823 
I heard today the sad news that one of the "grandfathers" of string, Hector Rubenstein, recently passed away.
He was...

Nov2209 08:58 PM
arivero

2 
2,147 
Is there anyone familiar with this paper "Yukawa Couplings Between (2,1) Forms.Nucl.Phys.B298:458,1988,P. Candelas." ?...

Nov2209 07:46 AM
johnstrass

0 
921 
I'm currently doing a third year project (undergraduate) on supersymmetry, and am slightly confused as to just how the...

Nov2209 02:23 AM
ansgar

3 
3,852 
Hi,
Now that my book is finished, I’ve been toying with an idea for an animation I’m thinking of doing. One of the...

Nov2109 07:09 PM
rrw4rusty

2 
3,634 
Can anyone explaine to me why there is exacly 11 dimensions :bugeye: , why not 13 or 7? I have searched a lot but I...

Nov2009 09:02 PM
SimonA

60 
35,637 
Hi,
My latest animation project has shown how big (or small) subatomic particles and strings are in relationship to...

Nov2009 08:19 PM
rrw4rusty

0 
721 
I have recently heard of a theory that states that faster than light time travel is possible by disrupting the fabric...

Nov2009 01:53 PM
Lamented_Soul

11 
2,754 
Atyy spotted this paper yesterday
http://arxiv.org/abs/0911.3793
GravityYangMillsHiggs unification by enlarging...

Nov2009 10:54 AM
atyy

1 
1,481 
So Thieman and co are still working on the Master Constraint program for canonical, nonSF, LQG?
I thought that...

Nov2009 12:20 AM
tom.stoer

3 
1,064 
I tried to understand Connes' approach several times but eventually I got stuck all the time. Does anybody know an...

Nov2009 12:02 AM
tom.stoer

4 
1,236 
Hi there,
Can I ask
(i) Is Lorentz covariance the same thing as Lorentz invariance? They seem to appear...

Nov1909 02:32 PM
Ben Niehoff

1 
984 
Does anyone know?

Nov1809 11:38 AM
MTd2

10 
1,130 
Does anyone know?

Nov1809 05:56 AM
MTd2

31 
2,203 
Say I sit at some point P in a CalabiYau manifold. Are there geodesics which start from P and return to P?
Are...

Nov1809 02:56 AM
apeiron

9 
1,344 
Loop Quantum Cosmology has so far deal mainly with highly uniform models like what is normally studied in classical...

Nov1609 07:31 PM
marcus

2 
1,500 
Hi, I have a question on the gauge formulation of gravity and supergravity.
The question that I have first...

Nov1509 07:07 AM
Ygor

0 
1,097 
Assuming string theory is on the right track, would the electromagnetic field of some radio station antenna be given...

Nov1409 05:42 PM
Spinnor

0 
903 
The following is either the most important paper so far in the 21st century, or a big mistake.
hepph/0607198
...

Nov1409 05:22 AM
BigFairy

36 
4,710 
I don't know if String Theory solves all of our problems, or whether it is nothing more than a mathematical model for...

Nov1409 12:28 AM
mjacobsca

0 
871 
Hi!
When quantum mechanics was established it allowed us to do things that we could not do before.
What would...

Nov1309 03:07 PM
rootofunity

15 
1,807 
Hi there,
How is the lightcone gauge useful for a quantum relativistic particle and for a quantum relativistic...

Nov1309 12:30 AM
tom.stoer

1 
1,089 
I'm about to finish the second semester of the second year of a physics BS (out of 5 years). Next semester I will be...

Nov1209 09:46 AM
fluidistic

0 
861 
http://pirsa.org/C09026
You can consider Petr Horava talk as both the last talk of Asymptotic safety conference or...

Nov1009 10:33 PM
MTd2

8 
2,909 
For me the most exciting talk, with the most new content, was by Vincent Rivasseau.
He is at Orsay. That means the...

Nov909 10:31 PM
atyy

3 
1,388 
I am not talking about superstrings, but the idea of supersymmetry itself.
Let me say what annoys me. I will put...

Nov909 02:41 PM
MTd2

13 
1,348 
First of all, who discovered the enhancement of symmetry in compactified theories, when the radius of the compact...

Nov909 03:48 AM
arivero

0 
891 
We already have videos for 5 of the talks.
Steven Weinberg
http://pirsa.org/09110039/
Martin Reuter
...

Nov809 03:33 PM
atyy

21 
3,009 
What is the best review article, published in a peerreviewed journal, introducing string theory?

Nov609 08:50 AM
Demystifier

11 
4,183 
I know you guys won't like this here, but I wrote it when I had the illusion of understanding things. It's not such a...

Nov509 06:55 PM
SimonA

0 
832 
I took a look at the back of a book titled "The Black Hole War" by Leonard Susskind. The last sentence of the...

Nov509 05:57 PM
SimonA

11 
3,100 
Dear Marcus,
You know everybody in the particle and QG fields and their reputations.
Could you name several...

Nov509 08:28 AM
Bob_for_short

37 
4,465 
I have watched numerous shows about physics and I am curious if I understand gravities apparent weakness due to 11...

Nov509 03:59 AM
mcpacker

5 
1,476 
Have loop quantum theorists looked forward to how one might fit the standard model into loop quantum gravity?
Thank...

Nov309 12:22 PM
marcus

1 
1,262 
So whose quantum gravity theory will crashandburn if this is correct?
...

Nov209 12:46 AM
tom.stoer

17 
2,875 
I have done some studying on the membrane theory or string theory. I understand why energy can have no mass, because...

Nov109 11:16 PM
MaxwellsDemon

16 
3,372 
Ok sorry this should be put with Zapper post below

Nov109 04:44 PM
Rebel

0 
1,087 
the conventional HEPview is that low energy SM represents a "broken" symmetry from a larger symmetry that is realized...

Oct3009 04:39 PM
ensabah6

0 
954 
I am interested if you know somebody who did research, a theory beyond the Planck length, equal to 1.616252(81)×10−35...

Oct3009 03:14 AM
alexander11

27 
6,549 