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

Jul1412 08:32 AM
ZapperZ

1 
25,794 
This sticky is for announcements of pertinent scientific events, such as conferences, seminars, or public talks. This...

Y 12:49 AM
marcus

64 
62,930 
can string theory ever be proven wrong? will or do we have the equipment to find out?

Sep511 02:13 PM
yoda jedi

51 
17,805 
For those who are interested in QG, but find it a bit daunting , here is a nice read:
...

Sep311 12:43 PM
marcus

6 
17,831 
After the resuscitation of triality in Baez's commentary of Garrett Lisi work, it seems worthwhile to open a separate...

Sep2011 08:03 AM
arivero

14 
3,982 
Quantum mechanics does not take gravity into account at all. So when the energy levels of the hydrogen atom are...

Sep1611 01:11 PM
muppet

10 
4,253 
Is Ads/CFT correspondance the same as gauge /gravity duality?

Sep2011 05:17 AM
Polyrhythmic

4 
2,039 
Hi,
Can someone please tell me if current versions of string theory assume (or perhaps result in) a conservation of...

Sep111 04:06 AM
Demystifier

11 
3,411 
Or do we have no idea?

Sep1511 01:46 PM
ZapperZ

19 
5,485 
What is a nonunitary CFT?
Why are Euclidean CFTs allowed to be nonunitary?
I assume the opposite of Euclidean...

Sep611 09:30 PM
mitchell porter

7 
3,667 
I am not quite sure wheather this is the appropriate section. (since the question is about an experiment).
I...

Aug2811 01:43 PM
yoda jedi

6 
2,495 
Hi,
I have a question about the static gauge in string theory, in which one sets
\tau = X^0
I understand...

Aug2511 09:27 PM
crackjack

3 
2,807 
Interesting posts from Georg von Hippel at http://latticeqcd.blogspot.com/
Monday, July 11, 2011
Lattice 2011, Day...

Aug2911 10:11 PM
atyy

1 
2,304 
Hi,
I am interested in grand unification with extra dimensions. Especially the case when
extra dimensions are...

Aug2411 08:50 AM
timb00

4 
2,416 
If spacetime is composed of tiny quantum "grains," the gammaray photons' polarization should change from random...

Aug2711 09:02 AM
atyy

11 
5,042 
Hello,
like I said in the topic title I am interested in what mathematics is needed for string theory to be...

Aug3011 06:10 AM
haushofer

13 
4,739 
If the Higgs is not discovered with the present generation of machines then would that really be an important...

Sep611 08:44 PM
Fineliner

3 
2,597 
I have formulated an equation for time .
Equation is Time=mass*gravitational const/(speed of light)3
If this is...

Aug2911 07:43 PM
dhillonv10

2 
1,634 
arXiv:1108.6005 (crosslist from grqc)
No quantum gravity signature from the farthest quasars
Fabrizio...

Sep411 03:16 AM
tom.stoer

13 
3,216 
In recent months, the possibility of a dS/CFT correspondence, analogous to the famous AdS/CFT correspondence, was...

Sep1111 05:29 AM
mitchell porter

5 
3,295 
Researchers failed to find evidence of socalled “supersymmetric” particles, which many physicists had hoped would...

Aug3111 02:16 AM
czes

4 
2,284 
Here are video lectures I found just today, here's the syllabus:...

Aug3011 09:49 AM
MathematicalPhysicist

0 
2,064 
Im just starting to learn about super symmetry and I have a question. If super symmetry says ever boson has a fermion...

Aug3011 11:02 AM
arivero

1 
1,718 
In polyakov action , 2 terms can be added tto the action ,a cosmological term and gauss bonnet term . Can someone...

Sep211 04:48 PM
med17k

0 
1,274 
When I look for it, the best I can come up with are things related to making calculations simpler. But I would like...

Sep211 11:10 PM
atyy

5 
2,107 
http://zomobo.com/play.php?id=NhNyhqyvj6Q
I found out about this clever short animated movie from twitter:...

Sep211 11:21 AM
marcus

0 
1,415 
This may seem like a naive question to some people.
I had always heard that Lqg can easily incorporate...

Sep311 02:53 AM
tom.stoer

3 
2,069 
Is anybody here familiar with Asselmeyer's work on exotic smoothness and quantum gravity?

Sep1311 02:10 PM
tom.stoer

20 
3,859 
Today one tries to find indications for quantum gravity indirectly via lowenergy effects induced by "foamy" or...

Sep511 01:23 AM
tom.stoer

0 
1,022 
Is there any good arguments or reasons for why it seems the general consensus is that the linear Schroedinger...

Sep711 09:42 PM
Fyzix

2 
1,885 
I am a physician not a physicist, but I read Brian Green, Susskind, Thorne, Gamow, etc. I recently learned of the Blue...

Sep611 08:28 PM
DrZforLife

0 
1,409 
Recent searching of the light from the quasars indicate lack of the quantum fluctuation of the spacetime. ...

Sep711 10:20 AM
czes

2 
1,829 
http://arxiv.org/abs/1109.1290
Linking covariant and canonical LQG: new solutions to the Euclidean Scalar...

Sep811 01:57 AM
tom.stoer

0 
1,143 
Rhody raised this question. Garrett tweeted that he had talked with 't Hooft about unification and that 't Hooft likes...

Sep2011 08:29 AM
lpetrich

15 
3,305 
The 2nd law and observed expansion implies that the initial condition of the big bang had zero entropy, which implies...

Sep911 06:36 AM
gruff

0 
1,258 
http://arxiv.org/abs/1108.4389
Gauge Theories Labelled by ThreeManifolds
Tudor Dimofte, Davide Gaiotto, Sergei...

Sep1211 04:16 AM
mitchell porter

1 
1,574 
I heard in a conference that gravity forbids to construct local gauge invariants like Tr\frac14...

Sep1111 09:10 AM
atyy

1 
1,678 
Hi all,
I'm very curious about the current attempts to discover a theory of everything, and therefore naturally...

Sep1311 03:05 AM
haushofer

2 
1,711 
Why does Banks liken holographic spacetime to takeaway :confused:
Is dS/CFT then the restaurant at the end of the...

Sep1411 08:39 AM
czes

2 
1,387 
Hi,
I have a fairly simple question, in particular for the NambuGoto string,
S =  T \int d^2 \sigma...

Sep1811 03:31 AM
haushofer

10 
2,414 
If a point particle is a string viewed end on in three dimensions, or is a zero brane, isn't this merely a...

Sep2011 02:53 AM
mitchell porter

3 
1,922 
what means simetry Z2 in brane world??
why in randall sundrum model
ds^2 = A(y) dx^udx^v + dy^2
and A(y) =...

Sep1711 07:07 PM
alejandrito29

0 
1,765 