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

Jun2814 05:03 PM
marcus

63 
61,584 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Jul1412 08:32 AM
ZapperZ

1 
25,549 
how the decay of proton emerge from GUT Modles, did the group SO(10) contains gravity, or only the strong, weak and...

Apr812 05:47 PM
mwalmasri

0 
1,296 
Well, not new insights, but at least new paper and a new face:
http://arxiv.org/abs/1204.0328 Particle Physics from...

Apr712 08:45 AM
arivero

4 
2,044 
Which and why do you believe will turn out to be more 'fundamental' (in the sense that one will prove to be the...

Apr612 02:15 AM
Demystifier

3 
1,735 
Which talks' input will contribute most to future research in Loopandallied quantum gravity?
Since the poll is...

Apr512 09:32 PM
marcus

13 
3,166 
Carlip has argued that the dimensional reduction in many apprroaches to quantum gravity is related to the BKL limit...

Apr512 05:00 PM
marcus

2 
2,099 
i need what we mean by BL extension of the Standard Model ?

Apr512 01:51 PM
arivero

1 
1,144 
Hi all,
:shy:
Could anyone explain in very simple language, for lower UGrad standard, what spin foams and spin...

Apr412 02:29 PM
marcus

19 
3,726 
I am confused about what area is being minimised in the nambu goto action..the one in the target space or the one in...

Apr412 10:17 AM
tom.stoer

2 
1,558 
It is supposed that the smallest posible black hole (BH) has mass of Planck's mass.
But obviously one nucleon (or...

Apr412 08:22 AM
mfb

8 
2,228 
Daniel Schoch, "Gods as Topological Invariants",
arXiv:1203.6902
Abstract: We show that the number of gods in a...

Apr412 02:50 AM
tom.stoer

4 
1,756 
Please teach me this:
Does ''Higgs sector'' mean there are many Higgs particle types?Does custodial SU(2) symmetry...

Apr312 11:19 AM
mfb

4 
3,312 
http://lanl.arxiv.org/abs/1203.5719
Abstract:
We study a selfconsistent solution of the semiclassical Einstein...

Apr212 10:41 AM
Demystifier

9 
2,441 
In the thing I've read about string theory,nothing is mentioned about why do they vibrate.
Can we tell one reason is...

Apr212 03:18 AM
tom.stoer

5 
3,026 
In this forum, "Beyond the Standard Model", most of the discussion is about quantum gravity. But technically, even...

Apr212 02:06 AM
mitchell porter

0 
1,231 
Kisielowski Lewandowski Puchta have made a significant advance in calculating the transition amplitudes between...

Mar3112 02:09 PM
marcus

1 
1,339 
Gday All
First time post here.
I am trying to construct an animation of electron and hole flow through a conductor....

Mar3012 09:06 PM
spycatcher

3 
1,960 
http://www.physicsforums.com/blog.php?b=3873
What do you think? :tongue2:
Can you shed some light on that mess? Or...

Mar2812 12:55 PM
ZapperZ

1 
1,450 
I think this is the right forum for this.. are there any physical reasons to assume the evolution of a quantum system...

Mar2612 04:07 PM
naffin

25 
5,238 
well,
from GR or LQG as well, gravity is not force but geometry right?
When einstein knew gravity is geometry and...

Mar2412 02:00 AM
tom.stoer

1 
1,188 
Classical Time Crystals
Alfred Shapere and Frank Wilczek
We consider the possibility that classical dynamical...

Mar2412 01:08 AM
marcus

1 
1,438 
I believe in LQG where the theory itself regularises itself (quantised volumes).....string theory is supposed to ...

Mar2312 02:53 PM
Mark M

4 
1,779 
Hi All,
:smile:
1. Is it a property of all quantum gravity theories?
2. Do all string theorists and not just...

Mar2312 10:44 AM
genneth

5 
1,899 
Did any of you, read this new paper by Olaf Dreyer ?..
Can someone elaborate a little, what this paper is about....

Mar2012 07:11 PM
John232

6 
1,832 
Hi all,
what is the meaning/difference between perturbative and non perturbative vaccum.

Mar2012 09:51 AM
Naty1

16 
2,542 
There is an issue with the new paper by Bonzom and Smerlak on cellular quantization of geometry, which surfaces in an...

Mar1812 03:08 PM
marcus

3 
1,577 
Hi all,
Can anyone advise me on the following....I'm trying to get a more intuitive feel to classical strings and...

Mar1812 11:06 AM
Illuminatum

0 
1,115 
Can someone, please, explain to me (in layman's terms, ) the theory behind early cosmological phase transitions and...

Mar1712 10:33 AM
Naty1

3 
1,593 
Point is, Huerta and Baez, building upon the shoulders of Mtheoretists, show us that susy is more relevant that just...

Mar1512 12:19 PM
arivero

7 
1,965 
Hello everyone,
Usually, I think a lot about topics like, what's beyond our observable universe?, or could there be...

Mar1512 10:35 AM
math_way

8 
1,677 
Wouldn't Godel's incompleteness theorem imply that we could never have a theory of everything?

Mar1512 01:02 AM
lugita15

19 
4,553 
According to wikipedia:
"In physics, selforganized criticality (SOC) is a property of (classes of) dynamical...

Mar1412 11:15 PM
MTd2

8 
1,900 
I have been tardy in realizing the interest/significance of some 2011 and 2012 papers coauthored by Valentin Bonzom...

Mar1412 06:45 PM
marcus

1 
1,775 
In a Brane world model of two branes
could both branes to have positive sign ?
when the system of two positive...

Mar1412 03:21 PM
alejandrito29

0 
1,458 
It's often been hoped that gravity is topological, eg. Witten, Xu, Gu & Wen, Rovelli.
Heckman & Verlinde make a new...

Mar1412 02:06 PM
Blackforest

2 
2,073 
So far as I understand it, mass/energy causes gravity, and gravity results in time dilation. Does anyone know of a...

Mar1412 10:47 AM
lfighter

5 
1,412 
3 generation is required for anomaly cancellation, then the 4th generation seems redundant. But there are still papers...

Mar1312 02:11 AM
tom.stoer

3 
1,570 
any one universe is infinite.
So as there are multiple (parallel right?) universes, how do multiple infinities co...

Mar1112 04:21 PM
mathman

1 
1,315 
Hi all,
just like the atomic world is unobservable to our normal optical observation,
can it not be that there can...

Mar1112 11:13 AM
atyy

2 
1,555 
is it not possible to use satellites to use laser beams to accelerate particles like the ones used in hypothetical...

Mar1112 09:48 AM
dpa

0 
1,016 
Hello everybody,
I am currently studying QFT on curved spacetime and I got puzzled about the question:
Are Unruh...

Mar1012 10:41 AM
Naty1

4 
2,310 