Videos from Planck Scale conference now online

In summary, Gustav Holst's music The Planets features Jupiter as a bringer of jollity. However, the background independence of music is due to the arrangement of notes in melody and harmony.
  • #1
marcus
Science Advisor
Gold Member
Dearly Missed
24,775
792
http://www.ift.uni.wroc.pl/~planckscale/movie/

The first one I intend to watch is Steve Carlip's
He is talking about similarities that have emerged among different approaches to QG.
In particular evidence for reduction of dimensionality as you zoom in (inspect the spacetime geometry at smaller and smaller scale.)

Oh! Carlip's talk was on day 1 and they say they still have some technical problem with day 1, so far the videos from day 2 thru 5 are the only ones available.
 
Physics news on Phys.org
  • #2
Did you attended the conferences? I guess I read it before from you in another post. It's nice they put the videos... I was in the workshop in Valencia (my first time) and Barbero told they would put the videos in the same page, but I don't see them anywhere.
 
  • #3
Rebel said:
Did you attended the conferences? I guess I read it before from you in another post. It's nice they put the videos... I was in the workshop in Valencia (my first time) and Barbero told they would put the videos in the same page, but I don't see them anywhere.

Regret to say I did not attend. But the videos are great! I have now watched many of the presentations and also one of the two discussion sessions: the Tuesday one chaired by Hermann Nicolai.

I was interested to hear that you went to the Valencia workshop on LQG+Black Holes. Did any talk or talks stand out for you there?
 
  • #4
Why is Jupiter beyond the Planck scale? :confused:
 
  • #5
atyy said:
Why is Jupiter beyond the Planck scale? :confused:

You could be referring to the graphic header on the home page of the conference. A uniform grid of hexagons superimposed over a complex irregular natural background. Does anyone have any ideas of how to explain that graphic?
 
  • #6
marcus said:
You could be referring to the graphic header on the home page of the conference. A uniform grid of hexagons superimposed over a complex irregular natural background. Does anyone have any ideas of how to explain that graphic?

I was being facetious :biggrin: and talking about the musical header:

http://www.ift.uni.wroc.pl/~planckscale/movie/index2.html



The bringer of jollity :smile:
 
Last edited by a moderator:
  • #7
atyy said:
I was being facetious :biggrin:
By Jove! So that was the "Jupiter the bringer of jollity" section of Gustav Holst' music, The Planets.
I suppose the connecting idea is "space". The conference was about space (space under a microscope) and The Planets is categorized by many people along with Strauss Zarathustra 2001 segment as space music. To me it was a mismatch. Assuming they wanted classical music to begin and end each recorded lecture, can you think of something you'd have liked better?
 
Last edited:
  • #8
marcus said:
I was interested to hear that you went to the Valencia workshop on LQG+Black Holes. Did any talk or talks stand out for you there?

I also regret that I did not presented anything, but I'm also ethusiast about LQG and hope in the near future would be giving any modest aportation.
 
Last edited:
  • #9
marcus said:
By Jove! So that was the "Jupiter the bringer of jollity" section of Gustav Holst' music, The Planets.
I suppose the connecting idea is "space". The conference was about space (space under a microscope) and The Planets is categorized by many people along with Strauss Zarathustra 2001 segment as space music. To me it was a mismatch. Assuming they wanted classical music to begin and end each recorded lecture, can you think of something you'd have liked better?

I initially thought it wasn't suitable, but changed my mind after the extraordinary background at end of Jupiter (, 7:18-7:34) reminded me of Wen's pictorial depiction of long-range entanglement (http://pirsa.org/index.php?p=speaker&name=Xiao-Gang_Wen, 57:43).

Then I wondered whether music is background dependent or not. The standard notation has a fixed metrical (in the musical sense) background, and this is maintained in some performances, even with rubato, eg. Mozart's "I am always strictly in time. They all wonder at that. They cannot understand how I keep the left hand independent in the tempo rubato of an adagio, for with them the left hand always follows the right." However, I wondered whether this was true in performance across the entire section of the famous Jupiter tune (3:08-4:57) - I imagine that little segments might be well approximated by a "cartesian" metric, but not large segments. Of course, this only means that the spacetime is not flat, but curved - the background independence comes by the fact that it is the particular arrangement of notes in melody and harmony that determines the appropriate rubato.

So I looked up "differential geometry and music" and found http://books.google.com/books?id=6I9U9-Rls8oC&source=gbs_navlinks_s - which made me now want to understand what Chris Isham is up to nowadays http://arxiv.org/abs/0803.0417 :smile:
 
Last edited by a moderator:
  • #10
The Day One talks are now available.
Of particular interest, I thought, were those of Steve Carlip and Hermann Nicolai. Also Renate Loll, Fotini Markopoulou, Martin Bojowald.
 
  • #11
Hermann Nicolai's talk was very interesting.
http://www.ift.uni.wroc.pl/~planckscale/movie/
It covered work on a possible way of extending the Standard Model all the way to Planck scale with a minimum of complications---stressing econony. Work with Kris Meissner, one of the two people who organized the conference.

http://arxiv.org/abs/0710.2840
Effective Action, Conformal Anomaly and the Issue of Quadratic Divergences
Krzysztof A. Meissner, Hermann Nicolai
17 pages
(Submitted on 15 Oct 2007)
"For massless phi4 theory, we explicitly compute the lowest order non-local contributions to the one-loop effective action required for the determination of the trace anomaly. Imposing exact conformal invariance of the local part of the effective action, we argue that the issue of quadratic divergences does not arise in a theory where exact conformal symmetry is only broken by quantum effects. Conformal symmetry can thus replace low energy supersymmetry as a possible guide towards stabilizing the weak scale and solving the hierarchy problem, if (i) there are no intermediate scales between the weak scale and the Planck scale, and (ii) the running couplings exhibit neither Landau poles nor instabilities over this whole range of energies."

http://arxiv.org/abs/0803.2814
Neutrinos, Axions and Conformal Symmetry
Krzysztof A. Meissner, Hermann Nicolai
10 pages, 2 figures, Eur.Phys.J.C57:493-498,2008
(Submitted on 19 Mar 2008)
"We demonstrate that radiative breaking of conformal symmetry (and simultaneously electroweak symmetry) in the Standard Model with right-chiral neutrinos and a minimally enlarged scalar sector induces spontaneous breaking of lepton number symmetry, which naturally gives rise to an axion-like particle with some unusual features. The couplings of this 'axion' to Standard Model particles, in particular photons and gluons, are entirely determined (and computable) via the conformal anomaly, and their smallness turns out to be directly related to the smallness of the masses of light neutrinos."

http://arxiv.org/abs/0809.1338
Renormalization Group and Effective Potential in Classically Conformal Theories
Krzysztof A. Meissner, Hermann Nicolai
17 pages, 2 figures
(Submitted on 8 Sep 2008)
"We derive a general formula for the RG improved effective (Coleman-Weinberg) potential for classically conformal models, applying it to several examples of physical interest, and in particular a model of QCD coupled via quarks to a colorless scalar field. The closed form expressions allow us to discuss the range of validity of the effective potential as well as the issue of 'large logarithms' in a way different from previous such analyses. Remarkably, in all examples considered, convexity of the effective potential is restored by the RG improvement, or otherwise the potential becomes unstable. In the former case, symmetry breaking becomes unavoidable due to the appearance of an infrared barrier LambdaIR, which hints at a so far unsuspected link between LambdaQCD and the scale of electroweak symmetry breaking."

http://arxiv.org/abs/0907.3298
Conformal invariance from non-conformal gravity
Krzysztof A. Meissner, Hermann Nicolai
(Submitted on 20 Jul 2009)
"We discuss the conditions under which classically conformally invariant models in four dimensions can arise out of non-conformal (Einstein) gravity. As an 'existence proof' that this is indeed possible we show how to derive N=4 super Yang Mills theory with any compact gauge group G from non-conformal gauged N=4 supergravity as a special flat space limit. We stress the role that the anticipated UV finiteness of the (so far unknown) underlying theory of quantum gravity would have to play in such a scheme, as well as the fact that the masses of elementary particles would have to arise via quantum gravitational effects which mimic the conformal anomalies of standard (flat space) UV divergent quantum field theory."

Suppose you wanted to choose three talks that could serve to "triangulate" the current main direction of the effort to formulate Planckscale models of geometry and matter. To extend both the Standard Model and General Relativity to high energy density/small scale. What recent lectures would you choose?

I think I would pick:

Steve Carlip ( 29 June at the Planck Scale conference)
Hermann Nicolai (also 29 June at the Planck Scale conference)
Steven Weinberg (7 July at Cern)

For Weinberg start at minute 58 of this talk: http://cdsweb.cern.ch/record/1188567/ or watch the first 58 minutes as well, for history and context.
The other two are at:
http://www.ift.uni.wroc.pl/~planckscale/movie/
 
Last edited:
  • #12
The same videos are also available through page with better usability:

http://www.ift.uni.wroc.pl/~rdurka/planckscale/index-video.php [Broken]

Ps. Theme song was chosen by IT guys by random... No special philosophy behind it :)
 
Last edited by a moderator:
  • #13
thesamer said:
The same videos are also available through page with better usability:

http://www.ift.uni.wroc.pl/~rdurka/planckscale/index-video.php [Broken]

...

Thanks to Remi Durka and/or Thesamer for posting the talks in a more convenient form.
At the main site there is a slight inconvenience that if, for example in day 3, if one stops a talk before the end, and wants to switch to another talk on the same day, then there will be some slowdown unless one closes the whole movies window and reopens it fresh. It is easy to cope with it if one just closes and reopens fresh.

I have a lot of respect for Kris Meissner and Jerzy Kowalski-Glikman for organizing this conference. It was a smart idea to put together guiding people from several approaches (Loop, String, GRenormalization, Triangulations, Meissner/Nicolai conformal SM extension, Graphity).

Do you know Meissner? Here is his homepage:
http://www.fuw.edu.pl/~meissner/home.html

He has one or more highly cited papers in Loop Quantum Gravity, and several in String, and also he is collaborating with Nicolai on this very interesting economical extension of the Standard Model to Planck scale. Here are his recent papers---"date > 2002" meaning from 2003 - 2009.
http://www.slac.stanford.edu/spires/find/hep/www?rawcmd=FIND+A+MEISSNER%2CK.+AND+DATE+%3E+2002&FORMAT=www&SEQUENCE=citecount%28d%29 [Broken]

Before 2003 his work was mainly in String. Multifaceted guy.
I am beginning to see an emigré community become increasingly prominent.
 
Last edited by a moderator:

1. What is the Planck Scale conference?

The Planck Scale conference is an annual conference that brings together scientists and researchers from various fields, including quantum mechanics, general relativity, and cosmology, to discuss and share their latest findings and theories related to the Planck scale - the smallest possible unit of measurement in the universe.

2. Why are videos from the Planck Scale conference important?

Videos from the Planck Scale conference provide a unique opportunity for those who were not able to attend the conference to access the latest research and discussions in the field. They also allow for a deeper understanding of complex topics and provide a platform for further discussions and collaborations.

3. How can I access the videos from the Planck Scale conference?

The videos from the Planck Scale conference are usually made available online on the conference's official website or on other platforms such as YouTube. They may also be shared by individual speakers or organizations involved in the conference.

4. Are the videos from the Planck Scale conference accessible to non-scientists?

While the topics discussed at the Planck Scale conference may be complex, the videos are typically designed to be accessible to a wider audience. The speakers often use simple language and visuals to explain their research, making it easier for non-scientists to understand and learn from the presentations.

5. Can I ask questions or participate in discussions after watching the videos from the Planck Scale conference?

Yes, many conferences provide opportunities for viewers to ask questions or participate in discussions after watching the videos. Some platforms may have a comment section or a designated Q&A session where viewers can interact with the speakers and other attendees. You can also reach out to the conference organizers or individual speakers through email or social media to continue the discussion.

Similar threads

  • Beyond the Standard Models
Replies
4
Views
3K
  • Beyond the Standard Models
2
Replies
58
Views
11K
Replies
40
Views
7K
Replies
2
Views
2K
  • Beyond the Standard Models
Replies
1
Views
2K
Replies
61
Views
14K
  • Beyond the Standard Models
Replies
27
Views
12K
Replies
5
Views
10K
  • Beyond the Standard Models
Replies
5
Views
3K
  • Beyond the Standard Models
Replies
1
Views
2K
Back
Top