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Recent posts

Dmitry Podolsky

304. Science in Watchmen. How Ozymandias prevented Dr. Manhattan from seeing the future

If you have already seen “Wathchmen” (and/or have read the Moore’s graphic novel), recall that one of the main pillars of the storyline is the fact that Adrian Veidt (Ozymandias) used generators of tachyons located in his playboy hideout in Antarctica to prevent Dr. Manhattan from seeing the future and being able to affect Veidt’s [...]

HEP-TH/PH March 13, 2009 8 Comments
Dmitry Podolsky

303. Video of the day: Susskind’s lecture on general relativity 6

Just released… Previous lectures from the course can be found here. In this lecture (almost 2 hours!), Susskind discusses geodesics, parallel transport and curvature tensor.

ASTRO March 13, 2009 4 Comments
Pau Figueras

302. Dynamical black holes & expanding plasmas

Pau Figueras, research associate at the Department of Mathematical Sciences in Durham University, works on black hole solutions (and their relatives) in string theory. Dmitry. The AdS/CFT correspondence has over the years played an invaluable role in providing insight into the dynamics of strongly coupled gauge theories. An important application of the correspondence has been [...]

HEP-TH/PH March 12, 2009 1 Comment
Domenico Orlando

301. Relating field theories via stochastic quantization

Domenico Orlando, a full-time member of IPMU (Japan), is known for his works on many aspects of string theory such as string theory on curved backgrounds, quantum crystals and exact solutions in string theory. Dmitry. First of all I would like to thank Dmitry for inviting me to write about Stochastic Quantization in connection with [...]

ASTRO, HEP-TH/PH March 11, 2009 4 Comments
Dmitry Podolsky

300. Event horizon of Sgr A*

Dear friends, I am really sorry for leaving you without a physics post (the video clearly cannot be counted ) – the reason was my faulty internet connection. The post that you will see below was almost ready but I wanted to make a short last check before it gets posted, and that’s when my [...]

ASTRO March 11, 2009 10 Comments
Dmitry Podolsky

299. Video of the day: Why gravity is weak

It seems I did not post those for quite a long time… Another promo video about string theory – enjoy

HEP-TH/PH March 10, 2009 1 Comment
Antonio Garrido

298. Do all spherical viruses have icosahedral symmetry?

This is a guest post by Eric Lewin Altshuler (UMDNJ, Newark) and Antonio Perez-Garrido (U. of Cartagena). Dmitry. More than half a century ago Crick and Watson (Nature, 177, 473-475 (1956)) had the ingenious insight that viral capsids must be made of multiple units of the same small number of proteins, lest the viral genome [...]

APPLIED, COND-MAT March 9, 2009 1 Comment
George Koutsoumbas

297. Exact gravity dual of a gapless superconductor

This is a guest post by George Koutsoumbas from the National Technical University of Athens. Dmitry. I would like to thank Dmitry for the invitation to write a blog entry on my recent work with E.Papantonopoulos and G. Siopsis entitled “Exact Gravity Dual of a Gapless Superconductor”, arXiv:0902.0733 [hep-th]. The AdS/CFT correspondence has become a [...]

COND-MAT, HEP-TH/PH March 8, 2009 8 Comments
Renata Jora

296. Global aspects of the scalar meson puzzle

This is a guest post by Renata Jora from INFN. Dmitry. I would like to thank Dmitry for inviting me to write this post about our paper (A. Fariborz, R. Jora and J. Schechter) “Global aspects of the scalar meson puzzle”, arXiv:0902.2825. I will start with a few historical facts. It was first noticed that [...]

HEP-TH/PH March 7, 2009 9 Comments
Stefano Camera

295. Weak lensing signal in Unified Dark Matter models

This is a guest post by Stefano Camera (INFN and U. of Torino) about the work he has done in collaboration with D. Bertacca, A. Diaferio, N. Bartolo and S. Matarrese. Dmitry. A particular description of DE is suggested by the Unified Dark Matter (UDM) models. While most of the models of DE rely on [...]

ASTRO, HEP-TH/PH March 6, 2009 1 Comment
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  • James Ph. Kotsybar: SAGITTARIUS A* -- James Ph. Kotsybar Mysteriously cloaked, obscure despite Interior illuminating glare, Long ...
  • cad: The presentation can be found in several formats at http://pirsa.org/08110051/...
  • James Ph. Kotsybar: COMMENTS FOR THIS ENTRY ARE CLOSED -- James Ph. Kotsybar When the general public hears about A breakthrough in...
  • James Ph. Kotsybar: FEARFUL SYMMETRY (from Songs Of Experiments) -- James Ph. Kotsybar Beyond notice, out of sight in dimensions c...
  • James Ph. Kotsybar: OFF THE SCALE -- James Ph. Kotsybar The young lady known simply as Bright, who could travel at speeds f...
  • James Ph. Kotsybar: COSMIC PREDICTION -- James Ph. Kotsybar Betelgeuse is gonna blow! It?s just a matter of time It?s only ten...
  • Leo: Ok I have a question: if a black hole is supermassive, say 100 billion solar mass, let's suppose Alice fells int...
  • James Ph. Kotsybar: HIGHER DIMENSIONS -- James Ph. Kotsybar From point to line to plane to sphere there?s only three dimensi...
  • superkuh: I am glad you are back! No more disapointing weekly refreshings of that monkey....
  • Dmitry: Thank you James, beautiful and inspiring as usual :)...
  • Dmitry: Yes, renormalization group should still be applicable, but crit. exponents have to be different. By the way, if we ...
  • James Ph. Kotsybar: UNIQUE PARAMETERS -- James Ph. Kotsybar There is only one answer to creation. Though we don?t nearly understan...
  • Ariel Amir: Very interesting, thanks. It indeed seems to be very close to what we discuss here. I wonder whether the distributi...
  • Dmitry: Hi Ariel, thanks for the explanation! Let me now discuss a bit the application I had in mind. It has to do w...
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