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

Apr1214 02:54 PM
marcus

59 
45,938 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Jul1412 08:32 AM
ZapperZ

1 
22,279 
Hi everybody,
I have been looking over a number of papers by Alexey Kryukov and I have some questions. I have been...

Jul2011 03:03 AM
Demystifier

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Backgroundindependence is the requirement that the theory be formulated based only on a bare differentiable manifold...

Jan1213 12:06 PM
fzero

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http://science.uniserve.edu.au/school/curric/stage6/phys/space/relativ.html
There are many, many sites on the web...

Nov2103 12:16 PM
marcus

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1,924 
http://www.phys.psu.edu/people/display/index.html?person_id=417
Last year Martin Bojowald was a postdoc at the...

Jan206 03:09 PM
marcus

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I'm reading this:
==quote==
Einstein's theory of gravity, General Relativity, and our theory which governs the...

Jan2411 12:28 AM
tom.stoer

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By 'equivalence', I mean of the computational kind  i.e. in the same way any universal computer can emulate any...

Oct610 11:26 AM
S.Daedalus

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http://pirsa.org/12050061
Conformal Gravity and Black Hole Complementarity
Speaker(s): Gerard t'Hooft
Date:...

May1412 01:07 PM
marcus

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Dear PF,
Could you please advise me good detailed reference on Grand Unified Theories... especially I want to see...

May1512 02:06 AM
GeraldHoward

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1,920 
If you want some background on this question (i.e. why I'm asking), let me know.
But either way, this is a basic...

Dec1408 09:26 PM
BenTheMan

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1,919 
http://golem.ph.utexas.edu/category/
with Urs Schreiber and David Corfield
described as "focused on the...

Aug1706 04:18 PM
Kalimaa23

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1,917 
Simple question: is AAAD (= ActionAtADistance) QED standard / mainstream physics  or beyond standard?
...

Nov2711 04:19 PM
qsa

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1,917 
When reading about string theory, the introductory notion seems to be that the tension in a string is what accounts...

Sep2104 03:38 AM
Curious6

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1,916 
What mathematically speaking is a spinor? Why isn't it a tensor? I didn't find the mathworld defintion very useful at...

Dec104 07:55 PM
jcsd

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1,915 
What is Black Hole Complementarity?

Sep1705 04:53 PM
hellfire

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1,914 
This is a longawaited paper.
http://www.arxiv.org/abs/grqc/0509075
Quantum geometry and the Schwarzschild...

Sep2405 08:31 PM
marcus

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1,913 
What is the space resulting from the identification (x,y) ~ (x+2piR, y+2piR)? How is it different from the space...

Aug1007 05:53 PM
ehrenfest

10 
1,913 
http://arxiv.org/abs/quantph/0505187
Quantum Physics from A to Z
Authors: M. Arndt, M. Aspelmeyer, H. J....

May2605 09:14 PM
marcus

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1,912 
It seems many people in Science have gravitated towards some form of a multiverse. Whether it's a Cyclical Universe or...

Jan914 10:50 PM
phinds

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1,912 
Alejandro recently submitted a post at SPS which engaged the active attention of Lubos Motl. So much so that unless...

Aug3004 02:31 PM
arivero

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I read up a few articles on him after someone told me to, and from what I can tell, it is really interesting. I heard...

Apr3006 11:59 AM
Alexander Demets

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1,911 
HOw can you compute a Gaussian functional integral?
i mean integral of the type e^{iS_{0}+i(J,\phi)}
if J=0...

Aug1107 01:59 PM
Klaus_Hoffmann

3 
1,911 
I am interested in a system of natural units that I see used more and more frequently in Quantum Gravity research...

Apr505 12:34 PM
marcus

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1,910 
Bee Hossenfelder had an interesting discussion of the term "emergent" back in mid 2008:...

Jan210 07:35 AM
Fra

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1,910 
Sorry if i repeat something already commented.
I have been a few time out of these forum.
I have recently...

Apr1504 09:06 AM
marcus

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1,909 
I was doing a thought experiment and came across something that I'm going to term the Planck Circle Problem for the...

Sep2906 12:28 PM
jal

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1,909 
I'm doing a theory project on Cosmological inflation, and I've been given an equation which involves T3 which is "the...

Feb1807 03:09 AM
Chronos

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Don't really want to go into much detail here :P, was just wondering during a crappy elctro/physics lesson today;
I...

Dec1708 11:51 AM
BenTheMan

1 
1,909 
Hi,
In Birrel and Davies ch4 they write:
\langle \psi:T_{ab}:\psi \rangle =\langle \psiT_{ab}\psi \rangle...

Apr1412 11:45 AM
LAHLH

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1,908 
While reading Lee Smolin's book "Three Roads to Quantum Gravity" in which he talks about the Bekenstein bound and a...

Jun1410 02:39 AM
czes

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I'm an engineer trying to get some understanding of string theory. I'm reading the Becker, Becker, & Schwarz book & am...

Nov211 03:10 PM
pbrane

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1,907 
Please have pity on a poor ignorant layperson struggling for understanding... and keep in mind that I am...

Apr1709 06:39 PM
apeiron

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1,906 
http://arxiv.org/pdf/grqc/0502110
Has any one a reason to believe that gravity is" quanta sizable", or
quantum in...

Mar1105 04:15 PM
wolram

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Hello!
I'm looking for some introductory articles on M and FTheory. Can anyone help me? I'm looking for articles...

Nov2810 07:53 PM
smoit

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1,903 
My understanding is that Fermi has results that show the mixing angle for neutrinos is not the same as the mixing...

Apr1812 02:51 AM
DrBenStill

1 
1,903 
It now looks like the Immirzi parameter has a critical value which is determined numbertheoretically, not by the...

Jul2711 10:23 PM
atyy

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Dave Mattingly has been a frequent collaborator with Ted Jacobson (his thesis advisor). You know of Jacobson if, for...

Jun1110 12:26 AM
Fra

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1,902 
Question above. Also, do you imagine time as a substance inside space, or, like a consequence of distance? How do you...

Feb610 03:31 PM
torquil

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Can any, qg or string theory reproduce dark matter ?

Jul2806 05:27 AM
mojocujo

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Canonical theories of gravities imply a foliation of spacetime into 3 hypersurfaces, each one labeled by time and...

Dec2712 10:25 AM
marcus

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I get the impression from the following material that LQG models have 'resolved'
the divergent big bang singularity...

Jan613 10:05 PM
julian

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