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Jul1412 08:32 AM
ZapperZ

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26,592 
This sticky is for announcements of pertinent scientific events, such as conferences, seminars, or public talks. This...

Aug2014 11:17 AM
marcus

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66,594 
In his review talk at loops 13 entitled "Loop Quantum Cosmology: A Eulogy" Martin Bojowald has declared that loop...

Aug2113 02:14 AM
mitchell porter

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5,988 
As I understand, complementarity approach claims that there are 2 different stories, for an infalling observer and an...

Aug2113 03:13 AM
Dmitry67

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In post #549 here I answered:
And then I was surprised by the comment of Tom, asking how the pairing was done....

Aug2113 03:32 AM
mitchell porter

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80,997 
Hi all,
I was thinking about the Holographic Universe theory today and wondered...
...If the universe was a...

Aug2213 11:34 AM
ibzy

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1,215 
This thread is in part belated appreciation of J.S.Engle's seemingly orderly systematic way of doing research, and...

Aug2313 12:13 AM
marcus

0 
882 
... due to whatever. What has the effort provided besides showing that the universe doesn't work a certain way?...

Aug2313 05:52 AM
Beer w/Straw

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2,145 
hi
quantum gravity has many problems, I find up to now.
I think this problems are conceptual and mathematical
is it...

Aug2413 04:41 AM
QGravity

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1,317 
This was just posted
http://arxiv.org/abs/1308.2206
Energetic Causal Sets
Marina Cortęs, Lee Smolin
(Submitted...

Aug2413 06:57 PM
audioloop

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3,651 
I may have poorly titled this post, since the lecture I'm talking about isn't just about tachyons, really. What I'm...

Aug2613 06:05 AM
trimok

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1,218 
This seems to be the most interesting development in QG currently. I want to know what you think might present serious...

Aug2613 07:44 PM
marcus

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2,996 
In the context of the recent Fuzz or Fire workshop,
http://online.kitp.ucsb.edu/online/fuzzorfire_m13/
I would...

Aug2613 07:53 PM
atyy

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1,013 
Black holes have an entropy, but they evaporate. At the end of the evaporation, the entropy is greater than the...

Aug2713 12:40 AM
Chronos

5 
1,249 
Hi all,
What is the Hamiltonian or main equation, that if you solve it, parallel universes are predicted?
For...

Aug2713 09:42 PM
julian

6 
1,717 
Why string field theory doesn't explane a black singularity but its called the theory of everything?
It just...

Aug2913 02:24 AM
SteamKing

5 
1,308 
Are the strings in MTheory impermanent, do they decay for example?(I am not a physicist, curious from a philosophical...

Aug3013 02:20 PM
WillyB

4 
1,225 
Hi all,
This is an entirely new question, separate from the post I just asked. I am just learning about parallel...

Aug3113 11:25 PM
MathematicalPhysicist

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1,984 
Chris Duston's talk on this starts at minute 43 of this video: http://pirsa.org/13070085
If you download the slides...

Sep213 05:42 PM
marcus

8 
1,479 
"Gauge" is normally understood as "mathematically redundant"
Why are gauge theories so prevalent? Why do they...

Sep313 07:57 PM
arivero

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13,590 
We have had several threads that discuss the 2009 prediction of the Higgs boson mass by Shaposhnikov and Wetterich,...

Sep413 04:37 AM
mitchell porter

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1,807 
Hey everybody, I have a few questions about membranes in string theory, so here it goes. What is meant by the membrane...

Sep1013 08:23 PM
Chronos

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1,070 
Hi, sorry for the quite long text. Thanks in advance for any help!
I am a little confused about the different...

Sep1013 08:50 PM
Physics Monkey

6 
1,882 
Hi, I don't know any physics, but I wondered if I could get a physicist to indulge me by telling me the most obvious...

Sep1613 08:33 PM
julian

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1,727 
This was just posted on arxiv. It seems to be of general interest so here's a thread in case anyone wants to discuss...

Sep1813 04:11 PM
marcus

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3,378 
Bee Hossenfelder has proposed a new approach to QG phenomenology, involving new ways to look for signs that spacetime...

Sep1913 01:49 AM
Paulibus

22 
5,141 
Hello,
Can anybody please explain what is super symmetry and what is special unitary group?
I read Wikipedia but...

Sep1913 05:57 AM
shounakbhatta

2 
1,146 
If it's okay to post this, here's a video about string theory. You can't really learn any physics from it, but it's...

Sep1913 09:49 AM
Greg Bernhardt

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1,362 
The new geometric version of quantum field theory could also facilitate the search for a theory of quantum gravity...

Sep1913 03:01 PM
korialstasz

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1,951 
According to string theory there are an extra 7 spatial dimensions curled up at every point in space. They are so...

Sep2113 09:43 AM
bapowell

2 
1,227 
Hi,
Unfortunately I am not actively involved in physics anymore since high school, but still very interested in the...

Sep2313 09:04 PM
Trenton

6 
2,734 
Hi there!
Smatrix is Path Integral with Vertex Operators inserted. I know how to compute ShapiroVirasoro...

Sep2413 05:47 AM
Korybut

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2,154 
Nice posting by Bee Hossenfelder on her Blog !..
...

Sep2413 05:49 PM
atyy

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1,429 
It has be mentioned the real singlet extension of the Standard Model by Chamseddine and Connes. But I favour a pair of...

Sep2513 02:20 PM
nicoo

4 
3,761 
Hi,
I am looking to find the invariants of products of fields under SU(5) and other possible gauge groups (but lets...

Sep2613 01:14 PM
fzero

3 
2,206 
Frank Wilczek and Larry Krauss point out (what is perhaps obvious but nevertheless important) that the universe acts...

Sep2613 08:29 PM
marcus

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1,595 
I tried to verify that the SYM lagrangian is invariant under SUSY transformation, but it turned out there is a term...

Sep2713 04:28 PM
Jim Kata

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3,659 
In West's book "Introduction to Strings and Branes", page 2, I don't understand why the auxiliary field e transformed...

Sep2913 03:20 PM
Korybut

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1,135 
Of the eighteen candidates, please choose the one(s) you think will prove most significant for future research in...

Sep2913 09:10 PM
marcus

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5,070 
Which do you think are the main quantum geometry (QG) lines recently appearing to rival Loop? Do any look especially...

Sep2913 10:38 PM
vasudevshyam

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4,072 
The fuss over "firewalls" is basically a challenge to the assumption that watching a black hole form and evaporate,...

Sep3013 07:41 PM
marcus

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I take it strings are too small to have "connectors" on their ends, there is no glue etc. so how could strings combine...

Oct113 11:15 PM
Chalnoth

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6,309 