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

Aug2014 11:17 AM
marcus

68 
67,083 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Jul1412 08:32 AM
ZapperZ

1 
26,706 
I just logged this on the biblio thread. This is in case there are questions, or things people want to discuss....

T 07:42 PM
marcus

132 
25,358 
In the "perche i nostri discorsi" thread, selfAdjoint gave a concise sketch of the direction that Carlo Rovelli sees...

T 07:29 PM
marcus

2,239 
550,757 
String effective action:
S=\frac{1}{2\lambda_{\text{s}}^{d1}}\int d^{d+1}x\sqrt{g}e^{\phi}\left+S_m
where
...

T 10:18 AM
Greg Bernhardt

1 
255 
Here's an idea that I came up with.
I've heard over and over again that there is no test yet available to confirm...

T 02:52 AM
haushofer

2 
217 
Of the twenty candidates, indicate the ones you think will prove most significant for future Loopandallied QG...

Y 10:29 PM
marcus

16 
5,521 
I think Markopoulou and Oriti have been sniffing this out a long time. Note that Wen has heuristically linked tensor...

Aug2914 04:39 PM
friend

218 
122,527 
It is frequently stated in the literature that the first attempt to unify gravitation and electromagnetism through a...

Aug2814 10:38 AM
atyy

1 
253 
Why is it such a big deal? According to the "modern" (Wilsonian) viewpoint, nonrenormalizability is not such a...

Aug2814 07:34 AM
haushofer

3 
385 
Dear PFer's,
I just finished reading the first chapter of Lee Smolin's famous "The Trouble with Physics". The first...

Aug2814 02:08 AM
haushofer

6 
545 
Does the LiebRobinson bound actually proved the speed of light from the assumptions of quantum theory. If it did,...

Aug2714 06:17 PM
friend

2 
159 
It was reported in December of 2013 here
http://phys.org/news/201312credencetheoryuniversehologram.html#nRlv
...

Aug2714 04:10 PM
atyy

1 
270 
I would like to interest the PF community in a collective activity based on some topics we have discussed from time to...

Aug2714 11:59 AM
arivero

10 
399 
Hello,
Can anybody please explain me how magnetic monopoles, fine structure constant and string theory are related...

Aug2714 06:12 AM
shounakbhatta

6 
504 
Hello,
I want to have a basic understanding. When we speak 10 dimension in String Theory, do we mention:
(a) The...

Aug2714 12:52 AM
shounakbhatta

3 
375 
While reading about von Mises distributions I wondered if the distribution of clusters such as galaxies could be...

Aug2614 11:38 AM
phinds

2 
193 
Hello,
I am trying to understand the concept of symmetries, SU(2), SU(3), unitary group, orthogonal group...

Aug2614 01:25 AM
VRT

11 
384 
I watched a lecture by Polchinski on youtube where he discussed firewalls that exist around blackholes. He said...

Aug2414 08:54 PM
marcus

4 
505 
This is a question currently pondered by many Quantum physicists and theoretical physicists.
I was just wondering...

Aug2414 12:46 PM
DaleSpam

1 
362 
If we assume that multiverse exists; it means that scientists goal are to prove this theory...but they are not...

Aug2314 03:15 PM
ChrisVer

15 
442 
Do different observers, say, inertial and accelerated, moving thru the same point in space, agree on the entropy of...

Aug2214 07:17 PM
atyy

3 
389 
Hello,
Is string theory or M theory wrong ? Isn't it the theory of everything ? Should we continue our research to...

Aug2214 06:16 PM
arivero

48 
9,745 
Why did Verlinde in his paper suggest that information is a central concept in the emergence of gravity? I mean why...

Aug2214 01:27 PM
friend

23 
4,311 
I remember reading some stuff online (it *seemed* legit) about how some physicists were getting finite answers to...

Aug2114 09:24 PM
Simon Bridge

5 
419 
While looking back at some gradings for exceptional Lie algebras, I rediscovered an old jewel of a paper...

Aug2114 05:57 AM
nuclearhead

48 
9,753 
If there were only one rotating massive body and a detector in the universe, would the detector be able to detect that...

Aug2114 02:58 AM
MathematicalPhysicist

3 
312 
Common sense really. Space is full of CBR (not to mention other radiation and matter). They keep being fed. The...

Aug2014 11:50 AM
marcus

6 
496 
I see there are new BH theories: "Planck stars" and "no Hawking radiation but a bounce in slow motion"
What's about...

Aug2014 11:42 AM
marcus

1 
333 
In case anyone is interested in DQ I came across this, which is moderately accessible in parts....

Aug2014 08:22 AM
kith

2 
346 
Is there a conncetion between Fritz john's ultrahyperbolic pde, which is the equation:
u_{tt}+u_{\tau \tau} =...

Aug2014 01:59 AM
MathematicalPhysicist

1 
336 
Hi,
While reading "Superspace: One Thousand and One Lessons in Supersymmetry" by Gates et al. I came across the...

Aug1914 08:11 AM
lpetrich

19 
1,254 
I'm watching a lecture by Edward Witten here: https://www.youtube.com/watch?v=Op8ZXIzlAwY
In it, he mentions that...

Aug1914 05:58 AM
tom.stoer

4 
468 
I've thought about this a lot and have tried to find the answer but have been unsuccessful. In the event of the big...

Aug1814 11:42 PM
porcupine137

7 
857 
Hi, I've been looking for a string theory review for a beginner graduate student. However, there is a vast number of...

Aug1814 07:26 AM
Demystifier

7 
485 
Hello,
How is it perceived the "Mathematical universe hypothesis" from Max Tegmark, in the scientific community ? ...

Aug1714 07:48 PM
MathematicalPhysicist

25 
977 
In its broadest sense, quantum entanglement means that two 'particles' separated by distance, and moving away from one...

Aug1714 07:38 PM
Greg Bernhardt

1 
309 
In a communication channel there is the timebandwidth product limiting the amount of information that can pass...

Aug1714 05:37 PM
atyy

8 
1,165 
Please note that I neither hypothesize the existence of such particle, nor know any evidence of it. This is purely a...

Aug1514 07:44 PM
arivero

4 
443 
Hi all,
I wonder if I study new Higgs scalars, How the data of the LHC for searching for heavier scalars
in h>...

Aug1514 01:04 PM
ohwilleke

4 
587 
In the standard model, electric charge isn't fundamental, it's a combination of "hypercharge" and what could be called...

Aug1414 03:38 PM
ohwilleke

3 
997 
I found a few curious arxiv papers by Alexandre Deur (via Twitter).
Deur works in QCD. He explains QCD strings...

Aug1414 03:08 PM
ohwilleke

3 
1,196 